I've heard different people quote different numbers for this, up to .003.
One time I checked my valve clearances when the engine was cold, then
checked them again when it was hot (on the same day). I only saw about .001
difference. But I still do my valve adjustments hot.
Just for consistency sake, let me describe the procedure that I use. I make
sure the engine is up to FULL operating temperature, usually by driving it
around for a half-hour or so. Then I let the engine "heat-soak" to equalize
temperatures. Usually by the time I've thrown on the fender cover, gathered
up the necessary wrenches, disconnected the wire to the points and pulled
the cam cover, I figure that's equalized enough. Then I go through the
adjustments as quickly as I can, doing two valves then bumping the engine
over to the next position. I can usually get through all valves within about
5 minutes.
Oh, and a little tip for anyone who is having trouble getting the cam cover
gasket to seal properly: wipe it dry (and the mating surface on the head)
and apply a very thin coat of wheel bearing grease to the gasket. And don't
over-tighten the bolts.
> -----Original Message-----
> From: owner-datsun-roadsters@Autox.Team.Net
> [mailto:owner-datsun-roadsters@Autox.Team.Net]On Behalf Of Brian
> Hollands
> Sent: Monday, December 06, 2004 6:22 AM
> To: datsun-roadsters@Autox.Team.Net
> Subject: RE: Valve Clearance
>
>
> Aren't you supposed to subtract .002 from the spec for a cold
> adjustment?
> Sounded right to me.
>
> Brian Hollands
> CSP '69 Datsun 2000
> Tampa, FL
> web.Tampabay.rr.com/oilleak
>
> > Today I checked the clearance on the valves, what I
> > found was that the intake are .006 and the exhaust are
> > .010. The "manual" that I have (DrDatsun) lists the
> > spec at .008 for intake and .012 for exhaust.
> >
> > Should I reset them to the specs? Why may the PO have
> > set them this way?
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