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Valve stem seals and look inside the butterfly
Quote:
Originally Posted by pmckechnie
mdawson, I had that exact same problem with my 84 500SEL. Idleing or going slow down hills, and then accelerating it would create a cloud so bad you couldn't see the cars behind you but other wise it used very little oil. This is what I found.
I removed the left (drivers side) valve cover. The cam oil tube mount at the rear of the engine was broken. Just above that spot is where the PCV system gets the fumes from the engine. Oil was spraying out of this broken mount directly into the this PCV port, running DOWN the channel in the top of the valve cover and right into the PCV hose. The fix was to replace the plastic mounts for the cam oiler tubes. I would go ahead and do both sides if you find they are dark brown in color. New ones are white.
PaulM
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Whether this is your issue or not, also remove your fuel distributor and MAF. Open the butterfly on the intake and see if you have oil accumulated in the intake and clean it out. I recently solved my oil burning issue by changing out my valve stem seals myself. Then, because I also had to change out my hardened Idle Air Control Valve hoses, I removed my FD and MAF. I discovered that my butterfly was covered in black soot. When I opened the butterfly, I discovered a pool of oil about 4-5 table spoons in quantity. After cleaning everything and replacing the hoses, my car now idles better than it has ever done since I got it 3 months ago. It's only been about a week since. In about another week of driving, I'll remove my MAF and re-inspect to make sure I don't have a continuing problem.
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03 CLK430 Cabrio 211K Pweter Silver/ Oyster Leather
90 300SEL 214k Pearl Black/ Alto Grey/Black Leather
Prior: 85 190E, 88 300TE, 89 300TE, 90 300E 2.6, 90 300TE, 92 300E 2.6, 91 and 93 300SL, 87 Ferrari Mondial Cabrio
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