740 Engine gunk.
 

Hello all, i own a 91 740 turbo 4 door. I am having no problems with the engine, but i jsut was wondering about some build up around the top of the engine...its not oil i dont think but its just a black gunk-ish substance. Should i worry? or is it jsut normal dirt and grime? Thanks.

RE: 740 Engine gunk.
 

Is it slimey and gooey?

It might be sludge and you can flush out the oil system.

RE: 740 Engine gunk.
 

Yes thats what it is....sluge

RE: 740 Engine gunk.
 

If your desire is to clean it, there are all types of brands out there. I run SeaFoam in mine.
However, if you run any of these cleaner in the crankcase too long, and too often, your seals can get a bit dry, and sooner than later case some leaks. Just follow directions, and you should be good.