Yes they should be backed off even if the engine has been run but is in
storage for next season. many modern racing valve springs are to within
0.050 of coil bind at full lift for a lot of reasons but you don't want to
leave them parked there for no good reason.
Dave ( just got done shoveling the white fluffy sunshine..)
> -----Original Message-----
> From: owner-land-speed@autox.team.net
> [mailto:owner-land-speed@autox.team.net]On Behalf Of Jim Dincau
> Sent: Monday, February 21, 2005 2:25 PM
> To: land Speed List
> Subject: Re: Topics of discussion
>
>
> Hows this one?
>
> Do valve springs loose tension when an engine is assembled but not run?
>
> During my tool and die maker apprenticeship I learned that to keep punch
> press die springs from loosing tension there was a percentage of
> free length
> not to be exceeded in compression. I don't remember the figure
> (it may have
> been spring type dependant) my technical half life on that trade expired
> long ago.
> Jim in soggy Palmdale
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