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-   -   Wierd carbon pattern (http://forums.pelicanparts.com/911-engine-rebuilding-forum/259109-wierd-carbon-pattern.html)

Mike Juzenas 01-03-2006 05:33 PM
Wierd carbon pattern
 
After takin my heads off I noticed this wierd pattern on the top edge of each jug....what is weird is its deeper on the sides than top or bottom. I still have the original honing marks on the jugs though...

Should I worry about this?

Cheers,

Mike

http://forums.pelicanparts.com/uploa...1136341810.jpg

Scott Wolthuis 01-04-2006 08:54 AM
If you're talking about the clean part of the piston (upper right hand corner) I think it's caused by incomplete combustion/unburnt fuel.
I think Smokey Unich's books talk about this and how to remedy it.

Scott


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