Do one bolt at a time. Loosen it (probably a quarter-turn is enough to release
all the pressure) then take it straight back up to full torque. Then go to the
next bolt.
What you DON'T want to do is loosen more than one bolt at a time. You don't want
to break the seal between the head, head gasket and block. The torque pattern is
important when installing a head to make sure that it pulls down evenly and
doesn't warp. Once it is all down, loosening one bolt won't hurt it. I still go
from the inside out on re-torqueing but I'm not sure it really matters.
Gordon Glasgow
Renton, WA
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Mike Harper
Sent: Tuesday, May 15, 2001 7:42 PM
To: datsun-roadsters@autox.team.net
Subject: head re-torque question
When re-torqueing a 1600 iron head, do you loosen the
bolts up to the "first" torque value of around 30 ft.
lbs., then go to 40, then to 50 in the normal inside
to outside pattern? should one loosen them more, or
less? I'm looking for some opinions. I know what
I've always done, but that does not make it right, in
fact that probably guarantees, it ain't right!
I am usually just happy if the torque value has not
changed, but I hear so much about re-torquing, that I
probably should be doing it more often...
Mike Harper
'66 1600
Charleston SC
--- Daniel Beatty <nowroc@pacifier.com> wrote:
> 1970 1600 Roadster, 2 owner car with just 135,000
> original miles and rebuilt
> engine $3000 in Everett, WA
> Check out the NOWROC Classified page for more
> details:
> http://www.nowroc.com/Webpages/Classifieds.htm
>
> Daniel Beatty
> NOWROCer
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