[DML] Re: carbon deposits in combustion chamber

["content22207" <brobertson@xxxxxxxxxxxx>]

Can't see inside the combustion chambers from either an injector bung
or an intake port. Only way to see what's going on in there (short of
pulling the heads) is to examine your spark plugs.

That rod you're seeing is a valve stem.

Some discoloration of intake valves is normal from PCV and EGR (for
cars so equipped). If you see any oil on them, time for new valve
seals. Of course the valve train itself swims in oil (hopefully). But
you do need to keep it changed regularly, and ensure that PCV works
properly, otherwise crud will build up under the valve covers.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "supermattthehero" <supermatty@xxxx>
wrote:
> 
> Anyway, getting to the point, when I pulled the fuel injectors, I saw
> quite a bit of carbon buildup in the combustion chamber.  I mean, I
> can clearly see a metal rod that goes through each chamber, but the
> bottom of it is really caked up with a hard black material.  Is this
> normal?  Should I try to scrub it out?  Let me say that I did not have
> any running problems with my engine before I did this, but I like to
> fix things before they break.  
> 





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