What are these 882 casting numbers? (pics)

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Jun 24, 2007 | 05:11 PM

LeMans Pete

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Melting Slicks

Joined: May 2006

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From: Raleigh NC

St. Jude Donor '13-'14

What are these 882 casting numbers? (pics)

I'm curious as what these other casting numbers are on the head. This head has the GM casting with a "6" and a vertical "21" in between the rocker arm studs.

And this one has a casting number "22" in between the intake ports.

And finally, a quick valve question. All the valves except this one look great. This one seems to have alot of deposit caked onto it. Could there be any quick reasons for one intake valve to be caked on, but the exhaust valve is clean?

Thanks for the help.

Jun 24, 2007 | 05:53 PM

BigBlockk

Drifting

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From: North Bend Ohio

The exhaust valves will always run cleaner than the intakes because they run hotter. The mixture may be a little rich. Try leaning the cruise out a little.

BigBlockk

Later.....

Jun 24, 2007 | 05:57 PM

LeMans Pete

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Melting Slicks

Joined: May 2006

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From: Raleigh NC

St. Jude Donor '13-'14

Quote:

Originally Posted by BigBlockk

The exhaust valves will always run cleaner than the intakes because they run hotter. The mixture may be a little rich. Try leaning the cruise out a little.

BigBlockk

Later.....

But it was just that one intake valve, all the rest were clean like the exhaust valves. After removing the valve I also got alot, I mean ALOT, of deposit held up behind the valve.

Jun 24, 2007 | 06:21 PM

MotorHead

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From: Who says "Nothing is impossible" ? I've been doing nothing for years.

Misaliined intake gasket on that intake runner or leaking screw in stud or leaking valve seal

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