If the noise lasts for more than a minute and completely disappears or dimishes after the engine is warm, the most likely cause is an exhaust manifold leak. The p0442PD simply means "pending". Cracked Cylinder Head: This does not happen frequently but can be the main cause of oil leakage in old cars. It won't cause drivability issues, and on a pre-OBDII car it probably won't even turn on the CEL. Which technician is correct?. With LPL EGR systems, there is a risk of introducing solid material into the turbocharger compressor and cylinder. I suspected the difference in exhaust back pressure was causing the change but i just could not find anything on the subject. When a vacuum leak occurs, this can affect the engine's fuel/air mixture and cause more issues with stalling, misfire, less power and acceleration, and a lower fuel efficiency. (Not JB Weld) VersaChem's exhaust manifold repair, or ThermoSteel, is said to be good to 2000 degrees. Probably the most common sign of an exhaust leak is increased engine noise. 4L motor I have an exhaust leak at the right manifold between the head and manifold. Effects include increased engine emissions, poor vehicle performance and damage to an engine's components. This damage is usually caused by accumulation of moisture in the exhaust, that leads to rusting and corrosion. You will need to look for an air leak to know it is your intake manifold gasket. If you're cleaning your engine bay, go ahead and put a plastic bag over your wrapped headers - the cleaning supplies won't do much to clean the exhaust wrap anyways. If they leak into the exhaust stream, the water ends up in the cylinder. Therefore, the exhaust is escaping before it can be metered by the oxygen sensor, and the sensor is getting a false reading. Of course, you won. The lower portion of a two-part intake manifold is often called the _____. There has been a leak detected in the evap system somewhere. The problem is the manifold bolts are failing/breaking which causes an exhaust leak which in turn causes the manifold to warp. Engine performance issues are another common symptom of a problem with an exhaust manifold gasket. For instance the check engine light can come on and show that side of the engine running lean, the computer will try to add extra fuel to correct that and that will damage the converter. A clogged catalytic converter or muffler is just one cause. My question is if I don't fix it immediately will I cause harm to the aluminum head. An exhaust leak can decrease fuel efficiency, causing your engine to work harder, and you to fill up your gas tank more frequently. Black soot marks where the manifold mates to the cylinder head are key indicators of an exhaust manifold gasket leak. gonna need help. Fortunately, the O2 sensor is still looking for oxygen in the exhaust. Can an exhaust leak pre turbo cause a stutter like affect or something similar? I think its a leak at one of the flanges pre turbo, it seems that once the exhaust heats up and expands at one of these flanges the leak stops and so does the stutter, its only on start up when the exhaust is cold, and there is no boost/vacuum leaks. While this is a fairly simple repair to perform, it does take some tools that not every may have. If the exhaust manifold has any issue with the heat shield or exhaust leaks the excess heat can cause damage to nearby electrical and plastic components. A leak on an exhaust manifold can be welded, or depending on the severity of the damage, result in having the unit replaced. Coolant leaks. The main reason exhaust wrap can cause premature rust is because it holds moisture. Once the damage is done the only fix is a valve job. In areas that do I/M240 loaded mode dyno emissions testing, or use an OBD II plug-in emissions check, problems with the evaporative emission control system (EVAP) can also cause. All of these can be signs of an intake manifold leak. An exhaust leak can cause serious pressure and turbulence issues especially pre-turbo. To inspect for an exhaust leak, have a helper start the engine and hold the idle at about 1500 rpm, listen for additional exhaust noises coming from the system including manifolds and head pipes. Even the smallest of leaks can cause the vehicle to vibrate, yet the bigger the leak the stronger the vibrations will be. If your Liberty has leaking exhaust, it can only be caused by some form of damage to the exhaust system itself. Use anti-seize. Sometimes coolant will leak out of the intake manifold gaskets and go right into the. (Under 2 psi is critical, as you can damage sensors or valves or create new leaks with higher psi. If ran long enough , a exhaust manifold leak can cause a burned valve due to the excessive heat build up on the cylinder head but its not very likely it would cause a cracked block. A cracked head may allow coolant to leak into one or more cylinders or into the combustion chamber of the engine. From me and about 3 other mechanics. I'm really not much of a mechanic. Replace exhaust manifold. Increased back pressure levels can cause increased emissions, increased fuel consumption, and can negatively affect engine performance. An exhaust leak can cause the vehicle to experience a reduction in power. an exhaust leak can cause a lean condition and will cause you to get worse fuel mileage as result I would start with the exhaust leak. Can an Exhaust Manifold leak cause engine damage? I have a 99 Ford Escort, and the exhaust is leaking from the manifold. Blue exhaust smoke. This sounds obvious, but better to check than end up with oil all over your engine compartment at best, or an engine fire at worst. The leak would have to be really big to allow enough cold air into the engine and damage a valve. 3 Causes of Coolant Leaks. catalytic converter efficiency below threshold bank 1 possible problems are engine coolant temp sensor or o2 sensor not reading properly or front and behind catalytic o2 sensors read similar-- ***** spark timing--damaged or leaking /exhaust manifold/catalytic conv/exhaust pipe. Exhaust Back Pressure. Having had an exhaust leak at the header (v6 Maxima) and having diagnosed several more, I'd say that a header leak has a distinctive sound - not like the sound of a leak at the bottom of the header or otherwise down the pipe, but pre-catalytic converter or muffler. The only way an exhaust leak can cause a rough idle is if the leak was in a place where it could enter the air intake system. This appears as the least serious of the problems addressed. Engine temperature stays constant at 175 F. also seafoam will cause it to leak from the cracks, not a bad idea to seafoam it anyway, you will see every crack for sure lol, also to determine if it is the header leaking or a lifter just open the throttle slowly by hand and listen to the ticking, if it goes away when you open the throttle (usually 1000-2000 rpms will do) then it is a lifter. If this balance is offset it will trigger the engine light. Causes here may include a defective EGR valve, EGR vacuum solenoid or motor, plugged EGR ports in the manifold, over-advanced ignition timing or engine overheating. After a few days My beetle wouldn't idle and would die at every intersection. When you add after market exhaust to a bike, you risk creating an exhaust leak, either at a joint, where the header pipe meets the cylinder head, or at a poor. Over time the O-ring can lose its ability to seal the cooling system and coolant loss occurs. The broke off flush with the cylinder head. It's always a good idea to take a look at the gaskets and connections in the exhaust system before looking for a failing pipe, manifold, muffler, or catalytic converter. 4L LE5 Description: The most weakest part of any exhaust system is the Flex Section. This could be a leak at the exhaust manifold caused either by loose/broken exhaust studs or a cracked exhaust manifold. 1-liter engine has a notorious weakness, a failure mode that GM will not cover after the warranty expires. This can damage plastic components in the engine bay. Left untreated pre-ignition can severely damage an engine. To detect if this part is damaged or worn, you must pay close attention to the sound of the engine, if it sounds loud, there is possibly a fault, you must also pay attention to a strong smell of gas and strange colors in the smoke emitted by the tube Exhaust, both are causes of a faulty exhaust manifold. Don’t forget to ask the community (forum) for help. (Page 1 of 4). 4L V8 engine powered F-150 owners may hear a “ticking” sound coming from the engine that changes with engine RPM. Transverse engines Look carefully for leaks down the back, between the engine and the bulkhead - use a mirror if. When the studs rusts out, wears or breaks the space between the manifold and exhaust system increases causing an exhaust leak and increased noise. Recently driving I noticed a really bad rotten egg smell and major loss of power and some sputtering while driving. 0 LT Mercruiser exhaust manifold water leak There's isn't any water passages between the head and manifold, so I doubt it's the manifold gasket. Be-cause of this, the engine's exhaust system is where water gets back into the. Use GM part # 12346004, Teflon pipe sealant (for high heat), or Locktite 272 (hi heat) to lock the exhaust manifold bolts into the head. can this lead to poor engine performance due to too much air mixing with fuel or is this unrelated and just causes annoying sounds?. Plain English. Engine pistons create vacuum on their downward stroke which allows the air/fuel mixture to be delivered into the combustion chamber. Injectors ticking are not a problem and you can drive with confidence. The diverter valve switches air flow from the exhaust to the atmosphere when it senses deceleration. You should know that when we say exhaust, this does not mean you are dealing with only one auto part, but with several ones; it is an entire system of interconnected parts. Keep in mind that exhaust gas, especially carbon monoxide, can be deadly if it enters the interior of the car. A stock engine should not over heat but age and wear and tear can "de-stock" one over time. 0 liter 305 or 5. For a couple of years I've been hearing an exhaust leak when the truck engine is under load, but start the truck, crawl under it and look for a leak and no luck. As the boost increases so does the exhaust manifold pressure stressing the gaskets. That will not cause a misfire code or what is going on with your engine under a load. A friend of mine has a 1997 with the same engine. These leaks can be hazardous as hot exhaust gases escape and can damage other components in the engine compartment. I had the dealership replace the manifold gasket the first time at about 40,000 miles before it got to the point of leaking coolant into the oil. The symptoms are a "stumble" and what feels like an erratic loss of power when cruising around at partial throttle. Replacement is simple, but some engine dismantling may be necessary to reach them. There has been a leak detected in the evap system somewhere. You might experience a reduction in power from the engine if this occurs. Causes of Exhaust System Leaks. can this lead to poor engine performance due to too much air mixing with fuel or is this unrelated and just causes annoying sounds?. Oil leaking at the back of the engine may also cause the clutch to slip if the vehicle has a manual transmission. The reason being that the leak can cause other problems. If your exhaust manifold starts to leak, it can cause severe damage to your car. Exhaust Back Pressure. O2 in the exhaust is normal to an extent, in fact most manufacturers INJECT fresh O2 into the exhaust manifold to "cheat" emissions rating, making the engine appear to burn cleaner. Exhaust systems can be dangerous because exhaust contains carbon monoxide that could be deadly if it reaches the passenger area of your car. Over time, the constant expansion and contraction of the components (caused by constant heating and cooling in the engine), may cause the gasket to leak. So my local shop somehow figured out I have the common issue of an exhaust manifold leakthey never back down from anything but said they didn't want to fix it they heard heads snap off and it might need machined out? (So now I know they do get scared) So I called the dodge dealer and they said to bring it in on Monday. Putting off repairs for an oil leak could lead to bigger headaches later on, from serious engine damage to overheating on the side of the road. If the engine runs on reduced load without reduction of the cylinder oil consumption, a lot of the excessive cylinder oil can end up in the exhaust manifold, so that when the load is increased, the rise in temperature in the exhaust channel will ignite the cylinder oil. This damage is usually caused by accumulation of moisture in the exhaust, that leads to rusting and corrosion. Mercruiser applications from 120 - 260 hp. CAUTION Caution: In order to reduce the chance of personal injury and/or property damage, carefully observe the instructions that follow. If you need an exhaust manifold repair you can take care of this issue on your own! No special tools or mechanical ability what-so-ever! Just find the leak and fix it!. Code P0174 Common Diagnosis Mistakes. A damaged exhaust can sometimes cause burnt gasses to pass backward and re-enter the combustion chamber. com > Models > Jeep Cherokee & Comanche Forums > XJ Cherokee Technical Forum > Can exhaust manifold leak damage and your ecm will cause the engine to. Upon research on the web it looks like this could all be symptoms of a leaky intake manifold gasket but I did read somewhere that exhaust manifold leak could possibly cause similar problems. Kia Sportage Exhaust Manifold. A stock engine should not over heat but age and wear and tear can "de-stock" one over time. It sounds like I have a broken exhaust manifold stud at the rear of the drivers side. If the exhaust pressure pulses interfere with each other, the exhaust flow is slowed, causing a decrease in volumetric efficiency (and thus decrease in horsepower). Mitsubishi 4G63 & 4G64 Engine - Free download as PDF File (. It is doubtful that the exhaust or an exhaust leak is the fault. If you have a standard transmission, you will have to ensure that the nitrous is shut off when you lift the throttle to shift gears. There is likely a fault coming from your injectors or O2 sensor. With the engine idling, take your can and spray down the vacuum lines and listen for the engine’s idle to change. If the noise only lasts for a few seconds, the most likely cause is a valve lifter malfunction. If the down pipes and collector are one part, seal any leaks with muffler tape (available at auto parts stores). This can be hard to diagnose, but will normally start abruptly under acceleration as the turbo boost pressure increases. You'll notice one or more of the following symptoms. its odd how a leaking exhaust manifold can effect the VW engine so much. This service will be performed at no charge for parts or labor. These factors all depend on where the leak is located in the exhaust. The service manual of General Motors Powertrain is intended for use by professional, qualified technicians. Exhaust risers and exhaust manifolds can become plugged and cause overheating. If your Falcon has leaking exhaust, it can only be caused by some form of damage to the exhaust system itself. When they first come out of the engine, exhaust fumes are extremely hot, but cool gradually as they reach the tailpipe at the back of the vehicle. The second manifold is known as the intake manifold. If the down pipes and collector are one part, seal any leaks with muffler tape (available at auto parts stores). It can cause problems, depending on where the hole is at, but a lot of times they don't, but a hole too close to the O2 sensor can throw a catalyst efficiency code, or rich or lean code. If your head gasket is damaged enough to allow a leak, then the leaking water and pressure can erode the metal of your head and engine block at the leak point. When you add after market exhaust to a bike, you risk creating an exhaust leak, either at a joint, where the header pipe meets the cylinder head, or at a poor. There are several problems created with exhaust manifold cracks and leaks. Engine temperature stays constant at 175 F. Manifold vacuum: With the engine running at idle, transmission in park or neutral (emergency brake set), take a reading of the gauge. If this balance is offset it will trigger the engine light. That process will reduce efficiency between cycles. Any damages and even small exhaust leaks can cause these gases to flow into your car and impair your judgment while driving. If your exhaust manifold starts to leak, it can cause severe damage to your car. If the leak is between the cyl head and the manifold it can cause engine damage to your exhaust valvefurther downstream it becomes an anoyance and is not routed thru your cat converter so it. If the leak is post cat it COULD effect the mileage because the leak CAN cause turbulence in the exhaust and that will slow the velocity of the gases causing a reduction in exhaust scavenging that will increase backpressure and result in a loss of power that can attribute to worse mileage. The stainless steel exhaust riser used by Mercruiser in the early 1990's was a good example of a poorly designed gasket/joint. If for some reason this hanger is not used then the swinging action causes rapid failure of the exhaust pipe to exhaust manifold doughnut gasket. Air leaking ,into, your car—not out of it—can be a problem. piston rings, valves), a vacuum leak, or improper valve timing depending on the specific level, provided that the level is stead. If it's leaking internally, that would definitely cause a flooding condition and a misfire. All of these can be signs of an intake manifold leak. Failure to meet these conditions will likely result in an engine backfire (explosion in the intake manifold) and serious damage to the engine including the supercharger and intercooler. We've all seen it - a rusted muffler riddled with holes laying in the middle of the road. But you’d hear a leaking exhaust manifold; even a small leak sounds like a tic tic tic in the engine bay. this is why these must be checked often and fixed quickly. If not repaired quickly, these symptoms will result in additional damage to other vehicle components including exhaust, transmission, radiator and engine driveline accessories. Sometimes I use a sheet of paper to see if there is a sizeable exhaust leak coming out, since it should make the paper flap. My question is if I don't fix it immediately will I cause harm to the aluminum head. Oil leak at exhaust manifold While under my 02 WRX today doing some unrelated work, I gave it a once-over, looking for anything loose or leaking, and I found oil that appears to be leaking from where the passenger-side exhaust manifold meets the head. This damage is usually caused by accumulation of moisture in the exhaust, that leads to rusting and corrosion. but nothing would come up except an engine running lean due to the incorrect signal from the Oxygen sensor on a modern car. If your engine is leaking oil onto the head, change all the seals - they are not expensive. Engine Exhaust System Problems of Nissan Altima - part 1 Nissan Altima owners have reported 189 problems related to engine exhaust system (under the engine and engine cooling category). Exhaust leak. Since the engine manifold is an essential part in transferring exhaust gasses from the cylinders to the exhaust pipe, any damage to this car part essentially means a damage to the exhaust system. To detect if this part is damaged or worn, you must pay close attention to the sound of the engine, if it sounds loud, there is possibly a fault, you must also pay attention to a strong smell of gas and strange colors in the smoke emitted by the tube Exhaust, both are causes of a faulty exhaust manifold. V6 Timing chain - The original timing chain is a pressed link steel design,. Manifold vacuum: With the engine running at idle, transmission in park or neutral (emergency brake set), take a reading of the gauge. Leaking coolant: when an intake manifold is failing, coolant will often begin to leak. The diverter valve uses a manifold vacuum signal to determine deceleration. It would start after the engine had come up to temperature and then cooled off a little and would stop when it got back to operating temp. Classic Industries offers a wide selection of 1962 Chevrolet Truck parts, including 1962 Chevrolet Truck interior parts and soft trim, 1962 Chevrolet Truck exterior sheet metal, 1962 Chevrolet Truck moldings, 1962 Chevrolet Truck emblems, 1962 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Because, A leaking exhaust manifold gasket can cause a burned exhaust valve. Exhaust leaks need be fixed for several reasons already mentioned: distort computer controls, exhaust gases in the cabin, possible heat damage (or fire) to other things within the engine compartment and should they continue the high O2 readings and excess fuel delivered may cause a catalytic converter issue and maybe fire due to excess heat in the converter. NOTE: If this test is inconclusive, tilt back the exhaust manifold to visually locate the smoking cylinder. Exhaust manifolds not within specifications must be replaced. Exhaust manifold leaks can be very problematic, but cracks in the manifold itself and bring a new level of headaches. Consult your vehicle repair manual to check engine timing. 7 liter 260 Chevy. An exhaust leak can decrease fuel efficiency, causing your engine to work harder, and you to fill up your gas tank more frequently. Air leaks are, by far, the number one cause of vintage engine piston seizures. The first set of engines that direct a part of the engine 1 and oxygen of the the units the clutch wheels is a greater. Mitsubishi 4G63 & 4G64 Engine - Free download as PDF File (. And how to deal with a manifold gasket leak. It's quiet at idle and light throttle cruising. can an exhaust leak cause sputtering? > Vibration under high manifold pressure conditions > a worn universal joint in the driveline. The occupants of the car can get poisoned by the carbon monoxide gas that comes inside. Most stock exhaust is made of iron and rusts. Average repair cost is $700 at 105,950 miles. As the manifold leaks or is damaged, it can cause vapors to come out and damage other parts of the car,. This gasket is constantly heated and cooled just like the piping. The thermal expansion and contraction that occurs every time an engine is started, driven and shut off creates a lot of shear stress on the exhaust manifold gasket. Without it, poisonous exhaust gases will reach your car's interior, and the car's engine will be damaged. An exhaust leak can create a great deal of noise, increase your emissions and cause the check engine light in your vehicle to come on. Next time I drove it the engine lost pressure in one cylinder. And second, the carbon deposits clog the pores in the ceramic catalyst and block exhaust flow. One of the main causes of white exhaust smoke and coolant loss is a cracked or warped cylinder head, a cracked engine block, or head gasket failure caused by overheating. And, I couldn't see the oil leaking yesterday. Due to the downward movement of the pistons and the restriction caused by the throttle valve, in a reciprocating spark ignition piston engine, a partial vacuum (lower than atmospheric pressure) exists in the intake manifold. The engine compartment likes to dirty itself even though the engine has no blow-by, and I can sometimes smell diesel exhaust in the cabin. Port side exhaust manifold and riser stay cool. Anyways I pulled off the heat shield on the passenger side exhaust manifold and saw a crack on the manifold. It shouldn't hurt anything except the noise will be annoying and the leak can be expected to get worse. The rubber deteriorates and can leak causing a vacuum loss. Anyone know how small an exhaust leak can be and cause erratic idle? I recently (a few months ago) made the mistake of letting a local machine shop (rhymes with larrys) surface my exhaust manifold before I installed my head. I once had an exhaust manifold water leakage and first detected it by a routine inspection of the spark plugs. I did not find obstructions in thermostat housing. Hydrocarbons are processed in the catalytic converter, which is located behind the engine, near the exhaust manifold. However, that can cause misfires by the spark plugs but at fault of the piston going slightly faster on the exhaust stroke. Exhaust leaks can lead to fowling out o2 sensors, if not fowling them out cause your car to read lean or rich costing you more in fuel. Use caution during this type of test; excessive cranking can cause engine damage in a hurry. Sometimes you can detect the sounds of the exhaust fumes leaking through, but the problem with this technique is that it can be difficult to distinguish these noises from that of a normal engine. What is sucked in will influence the fuel mixture and impact engine and emissions systems. I've seen it happen many times through the years. Catalytic converter rusted or blown out. An exhaust leak has nothing to do with this code. Coolant can also leak into an intake port and if enough coolant gets into the cylinder, when the engine is cranked, the piston can't travel all the way up due to the non-compressible liquid in the chamber - this is called hydrolock, and it usually causes the connecting rod to bend at a minimum (which requires an engine rebuild). Or if the leak is in some spots it can act like a torch and damage wiring or other parts. Rusted out exhaust headers or lengthy periods of turning the starter can cause water to build up in the exhaust line to the point it back-flows through the exhaust manifold and fills the cylinders. If the exhaust manifold gasket fails, the exhaust leak can result in engine performance issues. We just traded a 2002 Chevy Silverado 1500 HD with the 6. With the engine idling, a vacuum gauge connected to the intake manifold fluctuates between 16 and 20. While not as serious a problem as transmission related issues, it will require a replacement manifold. Intake manifold air leaks will suck in air, not expel it. CAUTION Caution: In order to reduce the chance of personal injury and/or property damage, carefully observe the instructions that follow. Bad exhaust will ruin your engine. Exhaust manifold cracked, gaskets blown or missing Refer to engine manufacturer’s manual and replace gaskets or damaged parts as required: Gas leak at turbine inlet/exhaust manifold joint Replace gasket or tighten fasteners as required: Gas leak in ducting after turbine outlet Refer to engine manufacturer’s manual and repair leak. Another reason behind the damage is direct physical impact. Re: Will an Exhaust Manifold Leak Cause Low Compression n the Cylinders If it is like a gasser, leaking exhaust manifolds can cause burned exhaust valves, which would cause low compression. Next time you pull the spark plugs, have a look at the pistons inside. Probably, those leaked oil were still stuck in between exhaust manifold and gasket because stud of exhaust were lose. If left unattended long enough, valves burn out due to the leak, which causes rough running engine. Cyclic sound from turbo. If the down pipes and collector are one part, seal any leaks with muffler tape (available at auto parts stores). Over time, small leaks can develop, and eventually they get bigger. That's because as the manifolds heat up the metal expands and can diminish or even completely seal a leak that's evident. ot is it can cause it to s"suck air" this can change the air fuel mixture in the engine. That level of excess heat can cause damage. Changing your boat exhaust manifold can usually be an easy enough job, if you have the proper tools and your repair manual. Just replace the valve cover gasket and make sure to wipe off all of the residue on the side of the head and the exhaust. Cooling water is extremely important for the risers; however it becomes extremely dangerous when the water leaks inside the exhaust layer. Small cracks are patchable, but large cracks require more extensive repair. Symptoms of an intake manifold gasket leak include poor engine performance, engine overheating and coolant leaks. This is the website for EricTheCarGuy! Here you will find answers to your automotive problems. Conclusion. A fault in the exhaust manifold can also present as negative performance in the vehicle. This damage is usually caused by accumulation of moisture in the exhaust, that leads to rusting and corrosion. Over time, the constant expansion and contraction of the components (caused by constant heating and cooling in the engine), may cause the gasket to leak. With LPL EGR systems, there is a risk of introducing solid material into the turbocharger compressor and cylinder. He took it to one shop and they said there's no problem or leak. When you say oil-cooled, do you mean that the way the oil drains through it was designed to do more cooling as opposed to the oil passages in our stock garretts, or just that there are no. Exhaust manifolds not within specifications must be replaced. An exhaust manifold leak can cause burned exhaust valves, improper fuel trim as the leak introduces extra oxygen that is picked up by the oxygen sensor, and slow warm-up time which also causes high fuel consumption, which will also cause your catalytic converter to fail prematurely, and the exhaust fumes can easily enter the vehicle cabin through the heating system and cause the passengers to get carbon monoxide poisoning, etc,etc. Exhaust and Intake Manifold Gasket Leaks on Older. The computer will see this and realize that the injector needs to supply more fuel. Use anti-seize. The lifters make a sharp tick sound, exhaust more "blurred" sounding but still kind of "ticky". Causes here may include a defective EGR valve, EGR vacuum solenoid or motor, plugged EGR ports in the manifold, over-advanced ignition timing or engine overheating. Air leaks can make your moped run poorly, or can cause the engine to idle faster than normal -- usually regardless of how much you adjust the idle screw. If your exhaust manifold starts to leak, it can cause severe damage to your car. Hey guys and gals. As someone who has evaluated hundreds of engine damage insurance claims, I can tell you that exhaust riser failures -- either in the design of the thing, or by corrosion failures -- is the single largest cause of engine damage and premature engine failure. Haven't yet installed an Exhaust gas temp gauge or boost gauge but plan to. When they first come out of the engine, exhaust fumes are extremely hot. I suspected the difference in exhaust back pressure was causing the change but i just could not find anything on the subject. IDENTIFICATION NUMBER. Trace the source immediately. If it is the gasket there is nothing I have seen that is able to repair the leak without removing the manifold and applying a new gasket. Oxygen from the air injection system causes this fuel to continue to burn. Too rich and the catalyst can melt down. After talking to the service rep at the dealer all they are doing is the bolts the busted off the manifold and the manifold gasket. 4L motor I have an exhaust leak at the right manifold between the head and manifold. Carbon monoxide poisoning can occur to the occupants inside the cabin of the vehicle, especially if the windows are closed and the air vents are open, allowing the. A leaking exhaust manifold gasket or cracked manifold can be. I have a 2015 Ram 1500 single cab with exhaust manifold leak, truck has only 45000 miles on it and leak goes away after about ten minutes. So, if you smell any exhaust, it’s probably escaping, or leaking, before it reaches the converter. If i were you, I'd go grab some 14mm sockets and get under there and start tightening up your joints all the way from the manifold back to the midpipe. On OBDII cars, pre-O2 sensor exhaust leaks can trip a P0171 and/or P0172 code for lean conditions. Again, the engine would run rough or stall if the valve opens. Over time, the flange gasket surface of the engine pipe can warp, reducing the clamping force on the flange gasket – this can cause the exhaust flange gasket to fail and the exhaust to leak. The easiest way to determine if you have an exhaust leak instead of a major engine issue is to gently rev the engine while in park. fixed promptly. The manifold is the part of the car that keeps the gases from leaking back into the car, so if you have a hole, or other problem in your exhaust manifold, you are actually leaking toxic fumes back into the body of the car. This can be hard to diagnose, but will normally start abruptly under acceleration as the turbo boost pressure increases. These leaks can either leak externally into the engineroom or they can leak internally into the exhaust stream. Have a buddy and a case of beer close by. Engine temperature stays constant at 175 F. with the exhaust manifold blowing to the extent. So my local shop somehow figured out I have the common issue of an exhaust manifold leakthey never back down from anything but said they didn't want to fix it they heard heads snap off and it might need machined out? (So now I know they do get scared) So I called the dodge dealer and they said to bring it in on Monday. An exhaust leak can decrease fuel efficiency, causing your engine to work harder, and you to fill up your gas tank more frequently. Flames can spread to a plastic spark plug wire channel and the rest of the engine. Tech B says that a leaking lower intake manifold gasket could cause a vacuum leak. It can leak to the outside of the engine or internally into the engine. Otherwise, expensive bolt extraction and thread repair may be needed. Haven't yet installed an Exhaust gas temp gauge or boost gauge but plan to. How can I tell if there is water on the cylinders? My plan was to just replace the exhaust manifold, change the oil 3 times or so and see if that solved the problem. Damage to any of the system parts may lead to a leakage of harmful gases before they are treated. It’s always a good idea to take a look at the gaskets and connections in the exhaust system before looking for a failing pipe, manifold, muffler, or catalytic converter. Anything can happen though, but water would almost have to run in the exhaust ports from a crack in the manifold. This was not detected however in my coach so that telltale signal was missing. Re: Broken Exhaust Manifold bolts Dec 13 2013, 6:33am There have been cases I have had where it will pull unmetered air into the exhaust causing the o2 sensor to detect a false lean condition causing an unnecessary rich fuel trim causing drivability concerns. can exhaust header leak cause engine misfire I have been tracing down a misfire in my 79 930 for some time now after changing over to an MSD programmable igintion. Below are the top 5 symptoms of an oil pan gasket leak. An exhaust leak can affect how your car runs or it can mostly just make your car's exhaust louder. In areas that do I/M240 loaded mode dyno emissions testing, or use an OBD II plug-in emissions check, problems with the evaporative emission control system (EVAP) can also cause. That process will reduce efficiency between cycles. This problem can be caused by an engine misfire or cracked exhaust pipe which will take in fresh air making the system lean. Its not fun when you have to build up a cylinder head and an exhaust manifold up with a welder, so you can get it resurfaced so it won't leak. 25 mm) may cause an exhaust leak and may affect OBD II system performance. Putting off repairs for an oil leak could lead to bigger headaches later on, from serious engine damage to overheating on the side of the road. I need to remove the exhaust manifold on the passenger side in order to unclog secondary air ports due to leaking valve stem seals (code p0491). An intake vacuum reading that is out of specification can indicate anything from an internal engine problem to a leaking exhaust gas recirculation valve (EGR). If the engine reacts to this in any way -- for instance, by speeding up briefly -- then the fluid is slipping in through the leaks. The effect on the turbo is two fold: One, it runs much cooler - doesn't glow red or anything (the exhaust manifold might (read: does), though - but that's a different story). Coolant can also leak into an intake port and if enough coolant gets into the cylinder, when the engine is cranked, the piston can't travel all the way up due to the non-compressible liquid in the chamber - this is called hydrolock, and it usually causes the connecting rod to bend at a minimum (which requires an engine rebuild). Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure. A common cause for exhaust leaks at the manifold is when a car is run thru a huge puddle that is deep enough to douse the hot manifold with large amounts of cool water. You depend on your Kia Sportage to get you and your family safely to your destination. gonna need help. Learn 5 ways to detect the source of the problems and troubleshoot them. If your exhaust manifold is cracked or leaking, the back pressure in the exhaust system will be incorrect, which can reduce engine power, cause sputtering and other problems. Cost $1200. exhaust, we headed down to the engine dyno. Inspecting Exhaust Manifolds And Risers Keeping a wary eye on raw-water cooled manifolds and risers can prevent the premature death of your engine. Re: 8N - Exhaust Manifold Leak Gasket Questions in reply to Matthew H Stockton, 12-12-2009 07:46:02 If the block is badly pitted, you will have problems; get out the hi-temp metal epoxy. could this explain the slight stutter at idle and the loss of power under acceleration? i have a triumph thruxton efi. The best way to get an exhaust leak fixed is to take your car to a shop that specializes in welding and exhaust work. You'll notice one or more of the following symptoms.