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RE: [xj-s] Torque Wrench Settings
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RE: [xj-s] Torque Wrench Settings



Kirkby - all the bolts and nuts on my 1984 HE were M8 (cap heads and nuts
alike).  So I did 'em all up to 9lb.ft.

On sealing the tappet block, I agree that an O ring (Viton, of course) would
be technically the best solution.  But I wouldn't use Hylomar.  The manual
specs Loctite 573.  I couldn't easily get that, but I used 574, which the
loctite specs have as almost identical.  It is an orange paste called
"Flange Sealant"

Visit Loctite's website, there is every spec for all there products
(www.loctite.com)

Craig Sawyers



-----Original Message-----
From:	owner-xj-s@jag-lovers.org [mailto:owner-xj-s@jag-lovers.org] On Behalf
Of Kirbert
Sent:	11 July 1998 19:58
To:	xj-s@jag-lovers.org
Subject:	[xj-s] Torque Wrench Settings

I can't seem to find any specs on how much torque to tighten the
bolts/nuts holding the tappet block to the head.  The various manuals
say to tighten them in order, but don't provide any guidance on HOW
tight.

The fact that the lower row is fine thread nuts while the upper row
is coarse thread Allen head cap screws complicates matters.  There is
a spec for the tightness of the camshaft bearing cap nuts (9 ft-lb,
1.2 Kg-m), and since the tappet block nuts are the same size and
actually alternating in the same row as the camshaft bearing cap
nuts, it would make sense to tighten the tappet block nuts to the
same torque -- even though it seems a little light for 5/16" nuts.
In fact, I may suggest in the help book to torque ALL of these nuts
when torquing down the cam bearing caps.  But do you use the same
torque spec for the coarse thread Allen screws?

Of course, I'm still peeved that the tappet block is sealed only with
Hylomar, no gasket involved.  If I had been the engineer in charge,
the mating face on the bottom of the tappet block would have had a
recess for a real long O-ring style seal.

 -- Kirbert      |     If anything is to be accomplished,
                 |     some rules must be broken.
                 |          - Palm's Postulate


 

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