![]() We should then be able where the oil leaks from. The next step for me is to go back to the mechanic and ask them to super clean this area and then drive it for 5-10 miles. Luckily, I saw the burning of a drop of oil on that are as I had my head almost over the exhaust manifold area (and all the smoke came into my face.). Thank you for your comment Pancho but the dripping is on the passenger side of the engine compartment. Keep posting, so that we can get this problem fixed for you. So, unless your job was poorly done, then it should not be the problem. Some years ago, I also resealed my breather (PCV) cover because of an oil leak. A good tip is to oil wet the new ring and the leading edge of the canister so that the new ring can seal without binding. If you continue to reuse the o-ring, then there is a likely hood that the old o-ring will distort and bind/kink, not sealing, and oil can weep down the side of the canister, and blow down the left/driver side of the engine. This notorious 0-ring issue is so well know, that it is difficult to believe that it would not be the first point of inspection for any mechanic.Īnother issue than can cause an oil leak (W208) is if the large o-ring on the filter canister cap is not replaced with the filter. On a 4.3L, the problem could arise from a well known villain-the transmission plug 0-ring leak, which could be weeping transmission fluid onto the exhaust pipe. Any help on this issue will be greatly appreciated!Īllow me to premiss-I don't know about the C240. ![]() Or, the valve cover itself is slightly warped not hermetically sealing creating a minor opening for the oil to escape? I also noticed that the PCV housing cover does not have a gasket to seal it on top of the valve cover, but I can not see whether that is the source of the leak since the plastic air intake covers are in position. Any idea where the leak is coming from? If not, how can we detect it? I am suspecting the the valve cover gasket groove or that on the engine block side are not precise and somewhere the gasket may be sitting low. After driving the car again, I smelled the burned oil again and saw little smoke on the passenger side of the engine compartment again. Also, he removed the PCV cover and cleaned it up and reinstalled it on top of the valve cover. I took it to a local mechanic and they replaced the valve cover gaskets on both banks. As I had my head low over the engine, I actually got some smoke in my face from a burned drop of oil that apparently just found its way down onto the exhaust manifold. I opened the hood and saw little smoke coming up from the top of the exhaust manifold - passenger side. Now that the weather has become colder and after a recent oil change I started smelling burned oil while driving and coming to a stop (traffic light or highway exit). I recently bought a used 2004 C240 4Matic with 150K miles.
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