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Mach 1 · 02-15-2002, 05:40 AM

It appears that my valve spring dampners are cutting into my valve spring shims.

I found metal shavings around my rocker arms when I tore it down. I guess this was the source?

Anyway, what would cause this? My springs are rated I believe up to .575 lift, and Im running around a .540 lift cam.

They are edelbrock performer 5.0 heads. The shims appear to be of a fairly light weight and flimsy material. Do I just need stronger shims, or do I have another problem?

And where can I buy replacement shims?

Also, there is a number stamped into the head by each spring seat. Its eithier 45 or 60. I assume this is the thickness that the shim is supposed to be for that corresponding spring seat in thousands of an inch. Is that correct?

02-15-2002, 05:40 AM	#1
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	cylinder head guru's, please help! It appears that my valve spring dampners are cutting into my valve spring shims. I found metal shavings around my rocker arms when I tore it down. I guess this was the source? Anyway, what would cause this? My springs are rated I believe up to .575 lift, and Im running around a .540 lift cam. They are edelbrock performer 5.0 heads. The shims appear to be of a fairly light weight and flimsy material. Do I just need stronger shims, or do I have another problem? And where can I buy replacement shims? Also, there is a number stamped into the head by each spring seat. Its eithier 45 or 60. I assume this is the thickness that the shim is supposed to be for that corresponding spring seat in thousands of an inch. Is that correct? __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142 Last edited by Mach 1; 02-15-2002 at 08:05 AM..