Valve Stem Damage - Anyone seen this before?

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Dec 17, 2006 | 12:27 PM

vettenuts

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From: Little Rhody

Valve Stem Damage - Anyone seen this before?

I have been rebuilding my stock heads now that the Darts are on the car. I have them disassembled and today was getting ready to clean the valves when I found this on every valve, but the worst are the exhaust valves. Anyone seen this happen before? Looks like the valve lock bit right into the valve stem material.

Dec 17, 2006 | 12:33 PM

Irocss85

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From: waterford MI.

is that a stock valve then? Ive never seen that before. wonder what would happen if you had 10deg. keepers, and 7deg. retainers? could that be a possiblilty? or the reverse?

Dec 17, 2006 | 12:38 PM

vettenuts

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From: Little Rhody

No, these were machined 7* locks made by the same company that made the retainers.

Dec 17, 2006 | 12:50 PM

chriswtx

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From: san marcos, TX

stock exhaust valves have a hardened tip welded on top of them. The line between the hardened tip and valve stem is normal..

I have a brand new set of stock valves and they all look like this..

Last edited by chriswtx; Dec 17, 2006 at 12:56 PM.

Dec 17, 2006 | 12:54 PM

chriswtx

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From: san marcos, TX

Quick edit...All the exhaust valves are like this..This a pic of an exhaust valve??

Dec 17, 2006 | 01:38 PM

vettenuts

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From: Little Rhody

Yes, I don't see this on the intake valves at all. There is like a groove that goes all the way around the valve, which just happens to line up with the top of the lock.