[Supras] Whipping noise, throttle control, stock fuel piping

[Hacker J]

A possibility is the spring/spring seats not seating correctly (can't see why this would go away
when warm). Could also be the actual valve hanging up in the guide. One could imagine a thermal
story that would lead to tighter guide clearances cold, but without good CTE numbers for the parts
it is just speculation that the clearances open up with heat.

I have seen pictures of a 7M head where the hardened seat came loose and wedged the valve open.
That was on a head with the seats replaced, so probably not applicable in your case. 

Jon
90T


> The snapping or whipping sound described in previous postings indeed
> appears to be coming from the intake side cam cover, the only one
> accessible to listen inside of without removing the PCV vent connection in
> back of the 3000 pipe.
> 
> The sound disappears when warm.  Has anyone had a valve sticking problem?
> 
> Bernie
> 
> 



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