Torque Ratings

[golf3]

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]

Bump........

[gtimk5]

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]

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]

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]

According to my Bentley manual, it says
Camshaft bearing caps to cylinder head (nut)
8v 20nm (15ft lb)
16v 15nm (11ft lb)

[gtimk5]

16 valvers only have 7m/m studs and they do snap.
8 valvers are 8 m/m studs Cheers