RE: Valve spring longevity ...

["PAT MARTIN" <MARDKINS@classic.msn.com>]

When I had my head rebuilt for the project, 6 springs were out of spec.  This 
was on a motor with only 97k miles.  YMMV.

Pat Martin
864000csq turbo, 2 1/2 cat back, H&R-Boge, MC and loving it.  Drilled rotors 
stopping it. Koenig Cobra 16x7 with AVS Intermediates turning it,  K&N and 
uh....  
95 subaru legacy 
Bothell, Wa



On Mon, 18 May 1998, MHLIGGINS wrote:

> <<They made a pretty shocking statement in there ... that valve springs are
> often out of spec withing 40K miles of use. >>
> 
>      I would believe that about Chevy and certain other U.S. made vehicles,
> not sure it would be as valid for high end euro cars, though.  Had some

Note too that the turbo head uses dual concentric valve springs.   That's 
expensive.   I suspect they did it for a good reason, and we probably 
don't have too muich to worry about unless we start making ridiculous hp 
levels.

I measured the valve lift at 0.4" which is not too high, so I suspect our 
valve springs are not terribly highly stressed.

Later,
Graydon D. Stuckey

"There's alot more to Jazz than just wrong notes"