Weird substance buildup
 

I have this weird substance building up around the inside of the oil filler on my '86 951. It's thick and looks like bacon grease. Any idea what might be causing it?

http://forums.pelicanparts.com/uploa...1394063279.jpg

Thanks,

Sorry, couldnt resist. :D

Let me google that for you

Oh, okay, thanks! :)

Time for an AOS service!

ROFL thats's priceless, but good advicehttp://forums.pelicanparts.com/suppo.../gaapslaap.gif

AS far as I know that is pretty common with the turbo cars and is only from condensation. When I removed my turbo for a rebuild rebuild I also did the AOS seals while I was in there and still have the same problem so just keep an eye on the throat and wipe the oil/water mix when you think of it.

Common in winter months due to the previously mentioned condensation due to hot/cold temperatures. More prevalent if you drive short distances instead of long trips. How's your water temp? Make sure you're getting it up to proper temp... if you live in a cold state then you can experiment with radiator blocking. It can be as simple as a cereal box covering half of the radiator to keep air from entering. This is at your own risk - you have to watch things very closely to make sure you don't get too hot. Golden rule is boiling temp of water to expelled moisture and condensation from the engine internals.

On a daily basis, I only drive my 951 a short distance (probably no more than 10 miles) to and from work, and I don't keep the engine idling too long before I leave for work early in the morning as I don't want to awaken the whole neighborhood (my 951 has a straight pipe exhaust setup, so, it's kinda obvious).

Ah, that's most likely the cause then. Wipe away what you can reach with a clean rag and then change the oil. Take it for a 30+ minute ride weekly to keep the moisture from building up again. Your engine will thank you by not corroding/wearing as fast.

Well, I do take my 951 for long drives on Sundays after taking my 930 out on Saturdays, so I guess I should keep it up.