Worn valves

Posted by Morten

Morten
Morten
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Morten

Worn valves
March 01, 2006 11:14PM

Registered: 01/11/2006
Posts: 366

I'm not sure if you remember the thread that I had going on ss.com 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)

open | download - worn-valves.jpg (80 KB)

Pete
Pete Remner
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Pete

Re: Worn valves
March 01, 2006 11:57PM

Registered: 01/11/2006
Posts: 2,022

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)
1978
Silence is golden, but duct tape is silver.