Ken,
My chemistry expert here at work tells me that carbon is only weakly
soluble in most liquids (even liquid iron). You have to remove it using
mechanical processes. I have heard that ground-up walnut shells can be
shot blasted to remove carbon without damaging the metal parts.
I would suspect that your valve seals have given up and the carbon you
see is burned oil that has seeped down the valve guides. Check it out
(seals and guides) while you have the head off.
Rick Chianese
SRL311-14035
Orlando, FL - 91F and the thunderstorms have arrived.
Ken Pearce @SMTP@Exchange wrote:
>
> What is it? Why do I have it? And how do I get rid of it?
>
> I've got copious amounts of oil coming out the PCV tube. I've checked the
> caulking on the PCV baffle on the valve cover, per Ross's posting a while
> back where he thought a motor needed rebuilding but ended up just needing
> a new valve cover, but mine looks OK.
>
> Is this oil blowing by the valves? rings? Clue me in here... My valves
> are absolutely caked with carbon buildup. Last time I had the intake
> manifold off, I looked in there and could barely even see one of the
> valves there was so much crud. I'm pulling the head this weekend to
> change out a leaking head gasket (right rear corner) and was wondering if
> anyone had any experience with products that dissolve carbon buildup?
>
> Any tips are greatly appreciated!
>
> Ken Pearce, 68-2000
> Lawrence, KS
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