Can Exhaust Manifold Leak Cause Engine Damage

Sometimes you can actually hear the clicking of the exhaust valves. To inspect for small leaks, start at the engine and go all the way back to the tailpipe. Even a loose motor mount can cause excessive engine movement and hide a cracked hose that leaks only when the engine twists it. The valve can cause engine-damaging sludge to form and the backup of pressure that may force oil to leak past gaskets and seals. Over time, the fumes leaking from a cracked exhaust manifold will damage surrounding components, and could even cause a fire. 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. Recently driving I noticed a really bad rotten egg smell and major loss of power and some sputtering while driving. 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. All of these can be signs of an intake manifold leak. Coolant leaks. Manifold leaks can vary in sound from a loud exhaust leak to a subtle ticking sound — often misdiagnosed as a faulty lifter in the valves. A marine exhaust system acts like a double walled pipe inside another pipe. If the leak is occurring in the manifold gasket or the manifold flange. I've read online that Dex-Cool has been accused of degrading the nylon middle layer in the intake manifold gaskets. NEVER run the engine without a thermostat installed or you will cause severe engine damage. Can overfilling your oil cause oil residue in your exhaust manifold without you breaking a ring? Stack Exchange Network Stack Exchange network consists of 176 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Too lean and the converter is unable to convert the hydrocarbons into safe elements and may not pass a state inspection. Upon a test run, I noticed that the car, on can an exhaust leak cause sputtering?. If this is the case, the intake, throttle body or even exhaust ports will need to be cleaned out. The engines have about 1660 hours on them. Leaks in the exhaust before the catalytic converter can cause unexpected oxygen sensor readings. A clogged catalytic is a very serious problem, as it will prevent exaust gasses from being able to exit the combustion chamber, and can cause permanent engine damage. An older-much older-vehicle with a carburetor will run lean. What type of inlet manifold gaskets do you have ? - metal or bakealite (efi ones). A leaking intake manifold gasket or an intermittently clogged or inactive fuel injector, for example, can reduce the fuel density inside the cylinder to the point that it fails to support combustion. lower temperature areas of the engine, such as the intake manifold, water neck. Inspect for broken exhaust manifold bolts. When end seals do leak, oil runs down behind, or along side, the water pump, and down the back side of the engine, but it usually won't end-up along that outer edge. Testing For Air Leaks. If they leak into the exhaust stream, the water ends up in the cylinder. I inspected the engine well looking for loose belts, hose clamps, tensioner, cracked exhaust manifold, or leaking manifold gasket. In some of the affected vehicles, the exhaust manifold studs may break, causing the exhaust manifold to warp and create an exhaust leak. The valve can cause engine-damaging sludge to form and the backup of pressure that may force oil to leak past gaskets and seals. CERTAIN 2011-2012 F-450/F-550 SUPER DUTY VEHICLES OVER 14,000 LBS. I've been searching through the forums for info about this but all I really keep finding is info on the (apparently very common) 4. The exhaust manifold obviously carries exhaust away from the engine compartment. Although you can have very small seeping leaks around valve cover gaskets that will seep oil onto the exhaust manifold. The stainless steel exhaust riser used by Mercruiser in the early 1990′s was a good example of a poorly designed gasket/joint. Is there any damage a cracked exhaust manifold can cause? I've been driving with mine for probably 2 months since I've noticed it getting bigger, but is there anything I should be concerned about like damage to the engine?. Turbo bearing system damage commonly caused by a high concentration of carbon suspended in oil, created by extended oil & filter change intervals or poor maintenance. The best way to check for external leaks is to road test the vehicle with a large piece of light-colored cloth tied under the engine. To understand why an exhaust leak is so detrimental to O2 sensor (also known as a wideband sensor) performance, one must first understand how an O2 sensor works. The leak will continue to drip oil while you are driving the car, which can cause a burning odor and possibly smoke, and if it isn’t attended to, can cause your oil levels to drop low enough to damage the engine. If there is an excess amount of oil found on the engine, an engine cleaner can be used to remove the oil which will help in locating the leak. A manifold leak may also refer to the Exhaust manifold that is leaking exhaust fumes from a bad gasket or a crack in the. Code P0171 Common Diagnosis Mistakes. Flames can spread to a plastic spark plug wire channel and the rest of the engine. Can overfilling your oil cause oil residue in your exhaust manifold without you breaking a ring? Stack Exchange Network Stack Exchange network consists of 176 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Symptoms Of An Exhaust Leak… The exhaust system of your car is made up of a series of piping which is designed to guide harmful exhaust fumes away from the engine. Used ones (if you can find them) are usually warped so new is the only way to go. Repair or replace as necessary. Vacuum leaks can occur anywhere in the intake plumbing downstream of the throttle body (throttle body gasket, intake manifold gaskets or vacuum hose connections to the intake manifold) You can use a scan tool to diagnose a vacuum leak. I have tried to keep the engine running while I feel around for escaping gases, but I can only do that for a minute or two before it gets too hot to go poking blindly around the manifold and downpipe. This cools the engine exhaust so it can be routed through the boat without too much concern for the parts of the boat that it passes near and through. 7L ENGINE — EXHAUST MANIFOLD STUD REPLACEMENT. This type of vacuum use was ubiquitous prior to the widespread use of electronic controls and devices, but many vehicles still make use of it today. I agree with BLUE70CAMARO. 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. So know that the exhaust manifold is bad. Few days ago, I just picked up my car at shop after fixing overheat issue. If you have any doubt about the positi9n of the water-injected exhaust elbow relative to the vessel's waterline under the vessel's various operating conditions, install a siphon-break. · White exhaust steam / smoke · Losing Coolant and engine running poorly, with No visible leaks · Coolant flooding the plugs & stalling the engine · Hydro-Locked engine, is locked down from a cylinder full of coolant Your intake manifold is by far the most likely the culprit. That last item can cause an engine to overheat and destroy itself. It sounded like it was coming from the area around the exhaust manifold or the engine itself. Anything can happen though, but water would almost have to run in the exhaust ports from a crack in the manifold. exhaust, we headed down to the engine dyno. A leaking manifold is also dangerous for your engine, it can cause a burned exhaust valve, which will lead to other problems. Driving through high water is another common cause for failure. "Can Bad Intake Manifold Gasket Cause Misfire? Watch more videos for more knowledge Can Bad Intake Manifold Gasket Cause Misfire https://www. Small exhaust leaks can often self seal once the metal engine parts are heated and expanded. One of the most common problems which can arise with an exhaust manifold is damage to the gasket which acts as a seal. Mar 27, 2016. Bank 2 refers to the side of the engine that does not contain cylinder #1. Absolutely, a leaking exhaust manifold can cause those codes. Rarely is water found in both locations. Abstract: Exhaust system components such as mufflers and exhaust aftertreatment devices are a source of engine exhaust back pressure. Replacement of the pan gasket is easier and recommended than mending. However, after 2-3 min driving, issue found. When the studs rusts out, wears or breaks the space between the manifold and exhaust system increases causing an exhaust leak and increased noise. It's quiet at idle and light throttle cruising. They make a sputtering sound as opposed to a lifter with a ticking sound. Improper service technique, such as pounding on the exhaust, may also cause damage. It may not be an exhaust leak. In other words the acetone will "leak" well before water ever would. Can cracked exhaust manifold cause engine temperature rise? by JohnRob11 | November 7, 2017 5:18 PM PST I became aware that my exhaust manifold has a small crack in my 2001 Honda Civic. It's not coming from head gasket. Coolant leaks into the crankcase dilute the oil and can damage the bearings in your engine. I have a dodge pickup and just recently had an exhaust manifold leak. Manifold pressure and is a means of determining. However, the best way of curing a leak is to remove the component and replace the gasket or seal. If there’s a hole in the exhaust close to the engine, these hot gases can leak out and blow straight at other components — causing heat damage and increasing the risk of fire. Atech 21 Intro to Engine Performance exhaust manifold can affect engine operation. Smaller leaks may only create minor changes in the sound. As blue smoke coming out of exhaust can be caused by some of the reasons mentioned above, so to get rid of blue smoke, you should find the cause and fix it immediately. Having extracted manifold bolts before from one of our tractors, I am too familiar with the difficulty of the job. could this explain the slight stutter at idle and the loss of power under acceleration? i have a triumph thruxton efi. Vacuum leaks that can trip the light include a sticky exhaust gas recirculation (EGR) valve, or more seriously, a blown head gasket. A vacuum leak caused by a bad intake manifold gasket can throw off the engine's air-fuel ratio and cause engine performance issues such as misfires, a decrease in power and acceleration, a. Moving parts can rip off your fingers. It’s detected if there is smell of burning oil. Re: Can exhaust leak cause P0171 and P0174 Fuel rail and intake manifold need to be removed. Damage to any of the system parts may lead to a leakage of harmful gases before they are treated. I inspected the engine well looking for loose belts, hose clamps, tensioner, cracked exhaust manifold, or leaking manifold gasket. The crack won’t cause any serious problems as long as it’s taken care of. Leaking coolant: when an intake manifold is failing, coolant will often begin to leak. "Can Bad Intake Manifold Gasket Cause Misfire? Watch more videos for more knowledge Can Bad Intake Manifold Gasket Cause Misfire https://www. That can effect fuel delivery, but would not cause an extreme loss of power. (When the car accelerates heavily the engine torque causes the engine to twist slightly on the engine mounts). An older-much older-vehicle with a carburetor will run lean. Also check intake at air compressor and the steel piping behind the engine I find these leaking all the time if you can make or barrow a blockoff plate and pressure check whole system would be best thing to do and replace manifold with all new studs nuts gaskets. This is known as shock cooling. The exhaust manifold gasket helps seal the union between the exhaust manifold and the side of the engine’s cylinder head. It shouldn't hurt anything except the noise will be annoying and the leak can be expected to get worse. Lucky for me no damage happened to the engine, it was just an. Yeah I forgot all about the O2sensors and was just wondering all together if the exhaust could cause the check engine light to come on for having a torn exhaust manifold gasket or hole in header. Bad exhaust will ruin your engine. 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. Starting from a dead stop produces the exhaust leak tick as well has heavier throttle. Unfortunately, the fuels we burn are made up of hundreds of differently structured hydrocarbons that burn in different ways and at different rates. Re: Random Misfire, exhaust leak causing it? 2004 2500 HD 6. Catalytic converter rusted or blown out. compressor impeller or turbine 6-4. For example, it has been estimated that a leak of one drop of oil every twenty feet is approximately equal to a loss of one quart of oil every 100 miles. A smoke machine attached to the manifold will pressurize the entire system. Then, if the engine was running, the exhaust pressure would probably keep the water from going down the runner in the head and the heat would cause the water to turn to steam. Can an Exhaust Manifold leak cause engine damage? I have a 99 Ford Escort, and the exhaust is leaking from the manifold. Are you seeing a bunch of steam in your exhaust??. Once the leak gets bad enough it will trip the check engine light with a "Lean Bank 1 or 2" (whichever bank has the leak usually the passenger side). Tighten exhaust manifold to cylinder head bolts. If any leaks are found, repair the leak, clear the code, and complete several drive cycles to verify that was the fix. You can use ether-based starter spray (probably the best) WD40 or even LPGas from an unlit propane torch. That is because continuing to drive with an exhaust leak or bad catalytic converter can damage other things in your vehicle's operating system. This normally takes 2 – 3. I am looking at a truck that definently has a bad exhaust but im ok with that since itys just a mudder anyways. Found a 'fresh' small exhausts leak from the manifold gasket of #3. Absolutely, a leaking exhaust manifold can cause those codes. Replacement of the pan gasket is easier and recommended than mending. Extensive leaks can fill the cabin of your vehicle with carbon monoxide, which can make you feel sick or even fall asleep while driving. For this reason, too much air enters in the cylinders and there is not enough gas for performing. But thick white smoke can indicate that the engine is burning coolant. The engine fuel management system relies on accurate MAF, oxygen, and air fuel sensor readings. Boost leaks are another reason why adding a turbo to your non turbo car can cause unforeseen problems. Mar 27, 2016. Not to dump on your choice of exhaust systems but Flowmasters has to be one of the worst systems perhaps next to Gibson. A good place to buy the boat parts that you need is a dealership. Apparently, the nylon-filled plastic used in the carrier is being attacked by the coolant, causing it to soften and deform. compressor impeller or turbine 6-4. The code P2098, post catalyst fuel trim system too lean on bank 2 simply translates to a lean (too much air and not enough fuel) condition the PCM recognized through the signals from the oxygen sensors. An exhaust leak can decrease fuel efficiency, causing your engine to work harder, and you to fill up your gas tank more frequently. So I got under 'er today and the heatsheild on the drivers side exhaust manifold is loose on the top bolt, nearest to the firewall. Do not replace O2 sensors when you have those codes. While the exhaust system is still cold the vapour is partially condensed so it becomes visible, and on a cut of an exhaust pipe usually there is water. Bearing damage may also be caused by metallic particles from engine wear or by steel shot suspended in oil following a major engine overhaul. If the noise you hear is a fast tap or clatter near the top of the engine, it could be valve noise which would require you to have some cylinder head work done. Leaks at the intake manifold are a common engine problem. maybe do a compression test on the side with the glowing exhaust manifold, it can be possible that maybe u got a slightly burnt or bent valve, and when the cylinder is firing maybe some of it is seaping through the valve. This can lead to driveability problems such as rough idling and stumbling on acceleration. Here's how to fix it. Under hard braking, oil drops can fall onto the exhaust manifold and catch fire. There are other things on the 3V 5. I do not know why EGR (exhaust gas recycling) valves were ever put onto diesel engines, they cause more trouble than they are worth. exhaust, we headed down to the engine dyno. If you have over 3" of cranking vacuum, the engine will have enough compression to start and run. Sometimes coolant will leak out of the intake manifold gaskets and go right into the. A leaking exhaust manifold gasket or cracked manifold can be. You will need the following: Intake manifold gaskets that will be used on the engine Intake manifold bolts Exhaust manifolds that will be used on the engine. Another reason behind the damage is direct physical impact. Of course, there could be many other reasons for a stalling engine, but a bad intake manifold gasket is surely one of them. Testing for Air Inleakage. Are you seeing a bunch of steam in your exhaust??. 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. The prices range considerably from one car to the next, and what we have provided is simply an average. Yes, sometimes you can have a leaky intake manifold "end seal", but you would be unusual to have that oil end-up along that particular edge of the engine. I have no check engine lights. Our million-mile warranty, which is the most comprehensive of any exhaust supplier, means Borla will stand behind your performance exhaust product longer than you will be driving your car and that’s a commitment you can depend on. Although you can have very small seeping leaks around valve cover gaskets that will seep oil onto the exhaust manifold. Usually, this condition causes the engine to overheat and, with high enough temperature, seriously damage the exhaust manifold. The only thing that could go wrong is if the missing stud is on one end of the manifold. A dry riser is cheap (it's just a pipe), and avoids the possibility of a failure in a water-jacketed riser that could leak water down into the cylinders. Pay close attention to the exhaust manifold, gaskets, and exhaust pipes pre-catalytic converter. If enough coolant mixes with the oil, the oil becomes very thick and viscous, and your engine can break down, or be damaged beyond repair, costing >$1,500 in repairs. Hot exhaust gases can leak into the cooling system, or coolant can leak into the cylinders and. 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 manifold leak may also refer to the Exhaust manifold that is leaking exhaust fumes from a bad gasket or a crack in the. Black soot marks where the manifold mates to the cylinder head are key indicators of an exhaust manifold gasket leak. Im assuming its gonna have some kind of exhaust leak which sounds a lot like a bad engine bearing but I want to make sure that it is just a bad exhaust and not a bad engine. you cant really see it but if you look right behind the intake manifold you can see a rubber hose that hooks into it. They will replace the broken gasket and put anti-seize on the threads of the bolts. First, the oil can leak onto the exhaust manifold causing fumes and the possibility of a fire. So I know it needs to be replaced but my question here is could there be more damage that I can't see even though the engine is running top notch. Because the exhaust contain carbon contaminants, and because the exhaust is hot, carbon can force in the exhaust passage and on the EGR Valve itself, causing it to block exhaust flow, clog the passage completely, or prevent the EGR valve from closing. could this cause the problem i described above? also failed on a insecure steering rack and a upper suspension arm has excessive play on a ball joint. Tighten/replace flange attaching nuts/bolts. First thing i would do is a compression test that will tell you if the head gaskets are gone or a radiator pressure test will do the same if it doesn't hold pressure the water is going somewhere whereas the compression test will show low compression which is one sign of the leaking head gasket. (When the car accelerates heavily the engine torque causes the engine to twist slightly on the engine mounts). 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. It can also be used to oppose cylinder pressure coming from the engine cylinders out of the exhaust, thereby slowing the engine down and the. I am looking at a truck that definently has a bad exhaust but im ok with that since itys just a mudder anyways. Very small leaks in the intake, or the exhaust system, can dramatically impact the accuracy of these readings. Just like most exhaust system problems, a leaking intake manifold gasket can also result to poor fuel economy and increased emissions. This was not detected however in my coach so that telltale signal was missing. The leak of intake manifold gasket can create major performance issues like stop engine vacuum and generate pressure. 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 the truck up in the air and supported. A third sign your exhaust may be leaking is if your gas pedal vibrates while you are driving. (Under 2 psi is critical, as you can damage sensors or valves or create new leaks with higher psi. Otherwise, expensive bolt extraction and thread repair may be needed. If your thermostat is sticking, replace it. These poisonous gases can be hazardous if they leak into the cabin of the vehicle. The head gasket may leak coolant into a cylinder or into the crankcase. Black soot marks where the manifold mates to the cylinder head are key indicators of an exhaust manifold gasket leak. After a few days My beetle wouldn't idle and would die at every intersection. A leak down test for the cylinders will tell if you have internal engine issues. The manifold may be warped, which would cause a bad leak. Yes it can, if the exhaust leak affects the operation of the upstream 02 sensor, Here was exhaust manifold exhaust leak, not only did the owner had to deal with the noise, but it affected the operation of the 02 sensor, where is set a lean engine code condition as well as a P0420 (catalytic below thresold bank 1). In this case, the cooling system is not to blame. Does Your Car Have An Exhaust Leak? 1. Are you seeing a bunch of steam in your exhaust??. Im assuming its gonna have some kind of exhaust leak which sounds a lot like a bad engine bearing but I want to make sure that it is just a bad exhaust and not a bad engine. 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). A core is a term used in the automotive industry for the old defective engine in your vehicle. Can an Exhaust Manifold leak cause engine damage? I have a 99 Ford Escort, and the exhaust is leaking from the manifold. Re: Random Misfire, exhaust leak causing it? 2004 2500 HD 6. Typical to an intake manifold gasket that is leaking, is an engine misfire, especially with the engine cold. Recently driving I noticed a really bad rotten egg smell and major loss of power and some sputtering while driving. An exhaust leak can decrease fuel efficiency, causing your engine to work harder, and you to fill up your gas tank more frequently. There is enough room to remove the wheel and have access through the wheel well. Some people get nervous around trying to tackle the job themselves but doing so will save you some money and it isn’t as difficult as it may look. There are a couple of different answers based on the vehicle. However, after 2-3 min driving, issue found. A fault in the exhaust manifold can also present as negative performance in the vehicle. the seams and joins between the exhaust manifold and the cylinder. If the engine has a V-configuration. On older vehicle models equipped with a distributor you can also adjust timing as needed as part of a tune-up procedure. Because lube shops have a bad habit of spilling oil onto the exhaust while changing it, which would cause some temporary smoking but is mostly harmless. In most cases the leaks are on the sides of the engine or in the rear of the engine where the exhaust manifolds attach to the engine, or the point where the exhaust pipes attach to the exhaust manifolds. Small exhaust leaks can often self seal once the metal engine parts are heated and expanded. What kind of fuel are you using? cheap crappy fuel can cause an idle issue, with the air filter housing on the vehicle spray carb cleaner, or engine starter around the base of the intake the engine running will make air suck through any leaks, the starting fluid will make the idle go up if there is an air leak in the manifold gasket. Manifold leaks can vary in sound from a loud exhaust leak to a subtle ticking sound — often misdiagnosed as a faulty lifter in the valves. If the manifold is cracked or has a leak, the back pressure in the exhaust system will be incorrect, which reduces engine power. Do not replace O2 sensors when you have those codes. A catalytic converter gets very hot in operation. Problems From a Manifold Leak A manifold leak can result in less horsepower from your engine, since the vacuum system is not working properly. Typical leaks between cylinder head, cylinder-head gasket, and engine block involve gas, oil, or coolant leakages. I do not know why EGR (exhaust gas recycling) valves were ever put onto diesel engines, they cause more trouble than they are worth. check for leaks or damage to exhaust repair or replace as necessary. Here is how to fix these problems: 1. There is a service bulletin on broken exhaust bolts that need to be replaced with stronger bolts. its odd how a leaking exhaust manifold can effect the VW engine so much. It is important to identify them and take care of the problem as quick as possible. The manifold will warp and possibly crack. You can barely see the rubber section of the plenum and its clamp screw down low on the intake manifold side of the throttlebody. Coolant leaks. I agree with BLUE70CAMARO. A dry riser is cheap (it's just a pipe), and avoids the possibility of a failure in a water-jacketed riser that could leak water down into the cylinders. This will cause even more damage to the surface. Loss of Performance Since the manifold is an important component of the engine's exhaust system and helps ensure that the engine receives the proper amount of backpressure (the pressure developed by the exhaust system as gasses are evacuated), a cracked manifold can negatively impair engine performance. Exhaust system leaks can also occur due to cracks from normal usage. Rarely is water found in both locations. A marine engine's cooling water and exhaust mix at the end of the exhaust elbow on the engine. The lifters make a sharp tick sound, exhaust more "blurred" sounding but still kind of "ticky". I got knocked back in a RWC the other day, and one of the reason was the the RHS exhaust manifold has a leak. Technician A says that a cracked exhaust manifold can affect engine operation. Extensive leaks can fill the cabin of your vehicle with carbon monoxide, which can make you feel sick or even fall asleep while driving. 7L ENGINE — EXHAUST MANIFOLD STUD REPLACEMENT. In this section, I will go over the function and specifics of each component. While the only way to be sure about a vehicle problem is to consult your local auto repair technician, there are some fairly obvious indicators that can help you isolate an exhaust leak, especially an exhaust manifold leak. Most stock exhaust is made of iron and rusts. If it's not losing oil then something is up. Foreign objects on the road can strike the converter. This could be a leak at the exhaust manifold caused either by loose/broken exhaust studs or a cracked exhaust manifold. What is the head gasket and what causes it to blow or fail? job since its failure can cause terminal damage to the engine or cause a serious lack of power. take a spray bottle of water,,,,and start spraying it around the intake and exhaust manifolds,,,,i mean get it soaked,,,if there is a leak in the intake,,or exhaust manifold,,,you should be able to tell the difference in engine rmps,,and found your leak,,,this comes from ray at raylar. It will cause engine performance issues like stalling, misfires, decrease acceleration and power. Exhaust manifold leaks are obvious, especially when first starting the engine. It's quiet at idle and light throttle cruising. Milkshake looking engine oil is a sign coolant is leaking internally to the engine, but it can also leak backwards…oil into coolant. Exhaust emissions. TSB 05-13-9. Make sure and have your exhaust manifold planed by a machine shop or at least put it on a belt sander so it's smooth and straight. I have no check engine lights. if you hear a rumble or Ronald down under your vehicle's exhaust system may be leaking that's something you should correct immediately because a lot exhaust system is only the most obvious result of the league automotive exhaust contains poisonous carbon monoxide leaking exhausted in danger you and your family no exhaust leak should go on paired in the past the only solution was a visit to the. If the car has not been running for very long the pipes are not hot enough to evaporate the water and the condensed water causes rust. Can Exhaust Manifold Leak Cause Engine Damage.