View Single Post
  #10  
Old 11-20-2009, 02:53 PM
ps2cho's Avatar
ps2cho ps2cho is offline
Registered User
 
Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,525
Pull your spark plugs and it should be obvious if the valve stem seals need to be replaced.
You will see a black "soot" type deposits left all over. You may need to pull all 6 because its not always all 6 that are leaking.

I have the same problem on my 260E and I burn through about 1 quart every 200 miles...I am pulling it apart next saturday and fixing it. I will take pictures and make a DIY for it. All you need is a valve spring compressor and the stem seal kit. Its relatively straight forward if you are handy. You'll need a second pair of hands, a kid will do, so he can take out the old seals while the spring is compressed by you. They harden up with age, not mileage. Both of my M103's that I bought have had the problem. They were leaking at 62k miles and I replaced them at 70k and it has not burned a drop since.

When the engine is cold it will smoke "slightly" upon acceleration, but once its warmed up it generally will not unless you floor it on the freeway.
__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k
Reply With Quote