[Roadsters] Cylinder head

[Gary and Cindy Ault]

I'm sure there are people out there smarter than me, but my opinion is as 
follows:

It makes no difference how one loosens the head bolts.  I am sure that many 
heads have proven to be warped after the heads bolts are loosened, and the 
head is removed.  But, I believe the condition is the result of stresses 
induced in the head by improper cooling or other factors, and that it makes 
no differences how the "tension" is released.  When the head and block are 
cool, there is no force I am aware of which could result in warpage, unless 
the head is already under differential stress "contained" by the clamping 
force of the head bolts.

Gary Ault

----- Original Message ----- 
From: "dave" <daveandlindab at comcast.net>
To: "'Bubba'" <bubwin at mts.net>; "'Datsun-Roadsters at Autox. Team.Net'" 
<datsun-roadsters at autox.team.net>
Sent: Wednesday, March 05, 2008 7:36 PM
Subject: Re: [Roadsters] Cylinder head


>I never heard that before, I didn't think a cold head woul warp from the
> torque being let off unevenly, but I guess it's possible.  Not refuting 
> it,
> just news to me.
>
> Dave Brisco
>
> -----Original Message-----
> From: Bubba [mailto:bubwin at mts.net]
>
> When loosening the head bolts, start at the front and crack the first two
> head bolts loose, about 1/4 turn, then the back two by the firewall, then
> the second row from the front, then the second last etc.  Once they are 
> all
> loosened 1/4 turn, loosen then another couple turns.  Tap on the side of 
> the
>
> head with a rubber mallet or dead blow hammer, or jiggle the manifolds 
> until
>
> the head pops loose.  Then remove the bolts and head.  Basically the 
> reverse
>
> of installation.
>
> This minimizes any chance of warpage.
>
> Bob Winslade
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