View Full Version : Torque Ratings
golf3
27-07-2006, 06:54 PM
When you're given torque rating for certain things..
Head Bolts, Conrod Caps, Camshaft caps...
Is it bad if you over torque??
I have a torque wrench, but 15nm for camshaft caps seems fairly loose...
Will that rattle loose??
golf3
27-07-2006, 07:07 PM
Bump........
gtimk5
27-07-2006, 07:17 PM
No, stick with the readings. VW know more than anyone about what torque things should be and you should never stress studs or bolts otherwise they will come loose due to a stretch bolt/stud.
For instance (and I apologise for this reference) air cooled motors with the 8m/m studs are only done to 18ft/lb each. Providing everything there is machined correctly they don't come loose. Cheers! :)
brackie
28-07-2006, 05:09 AM
Absolutely stay with the manufacturer's torque specs. Ever heard of "bearing crush"?
The only time I ignore VW is when tightening the cam sprocket on a diesel as it's a taper fit and there are many tales of it loosening with disastrous results on an interference motor. My son's lovely and rare Audi 100 diesel suffered this fate.
Oneofthegreats
28-07-2006, 10:30 PM
Just to reassure you & for interest sake.
All BMW camshaft bearing caps with a M7 thread are torque'd up to 14nM incl. all the motorsport vehicles. M3's, M5's etc.
If thats what the manufacturer recommend's, then that's what I'd do it to.
aussieg60
29-07-2006, 06:11 AM
According to my Bentley manual, it says
Camshaft bearing caps to cylinder head (nut)
8v 20nm (15ft lb)
16v 15nm (11ft lb)
gtimk5
29-07-2006, 06:49 AM
16 valvers only have 7m/m studs and they do snap.
8 valvers are 8 m/m studs Cheers:)
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