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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] 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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