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Worn valves

Posted by Morten 
Infallible Moderator
Location: Vancouver, BC
Join Date: 01/11/2006
Age: Possibly Wise
Posts: 366

Rally Car:
1974 Dodge Colt

Worn valves
March 01, 2006 11:14PM
I'm not sure if you remember the thread that I had going on about noise in the top end of my motor. In taking the rockers off, I think I've found the source of the noise.

Would worn valves cause a racket in the top end ?

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open | download - left-good-valve-right-worn-valve.jpg (80.4 KB)
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Pete Remner
Godlike Moderator
Location: Cleveland, Ohio
Join Date: 01/11/2006
Age: Midlife Crisis
Posts: 1,952

Re: Worn valves
March 01, 2006 11:57PM
Did you measure valve lash first?

The heads generally aren't what wear, the seats wear and the valve guides wear, which kinda compounds seat wear. They usually don't make noise in and of themselves, just have crappy sealing or fog for mosquitoes.

I did have one guy with heavy valvetrain noise over and beyond what his ill-concieved Rhoads Lifters would normally account for, it turned out half of the exhaust valves were sunk 1/4" *or more* into the heads...! But somehow I don't think this is your problem, or even possible on that type of cylinder head.

Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
Silence is golden, but duct tape is silver.
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