95 Audi 90 Quattro Oil smoke in exhaust.

I think I've learned another detail about this. I saw the same puff of smoke at the same intersection this morning. I realized that this stop sign is at the bottom of a hill that I coast down in gear using the engine to gently limit my decent. It would seem to me that, in this condition, I may be sucking oil past rings or valves into the combustion chamber without buning it while I coast down the hill, then it burns under accelleration. It's been suggested to me that these engines don't tend to wear piston rings or cylinder walls much at all. So, I guess I'm looking at valve guides?

Gene

"Gene" wrote in message news:Vk0kb.878$ snipped-for-privacy@newsread1.news.atl.earthlink.net...

Gene, You might try a "leakdown test" - I believe that may tell you if the leak is through the rings (= "blow-by"). In an intake vacuum condition - throttle body closed, engine winding away to slow the car, I would expect it to the valve guides as well. Cheers! Steve Sears

Pulling the heads and replacing valve guides (and all the gaskets) seems to have cleared this all up.

A point of interest: All 6 cylinder walls still have visible original factory cross-hatching. The engine has 180,000 miles on it! I expect I'll be driving this for a long time to come....unless I decide to get a 30V A4 some day.

accelleration.