Bill Peel writes:
> As a kid in the 60's, I hung out in my fathers repair shop and any time we
> adjusted valves, there were a couple rules:
>
> 1) Do the adjustment with the engine warm and running if possible.
> Sometimes the oil mess was too much. The engines seem to get better
> performance when the valves are adjusted warm and running...
Why can't people RTFM? If the manual says to adjust the valves cold,
I can guaranfuckingtee there's a reason. If you hang out with me, or
Sam Sjogren, or (I think) Scott Fisher and see us adjust our valves
hot, it isn't because it's a high performance tweak. It's because
the cam grinder told us to with our specific application.
If you care to demonstrate that you've done the calculations for
thermal expansion of the valves, rockers, pushrods, lifters, cam and
head casting and for flex rates and elasticy for all of these
components, then I might put some credence in your second guessing of
the manual. I don't know about other British makes, but the MG
factory manual says to set the valves cold. Doing it any other way
"because that's how it's done on car X" is specious, at best.
andy
banta@abingdon.sun.com
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