Quote:
Originally Posted by LvR
IMO that is wrong then ............... The tensioner has an in-built spring that, while the locknut is loose, will tighten the belt to the point where the tensioner spring reached its maximum ability - that happens to be not nearly enough to set the belt properly. Tightening the locknut at this stage achieves nothing other than locking the belt tension to that springs' tightening ability. The locknut has no use wrt tensioning - it simply prevents your pre-set belt tension from changing because of unwanted tensioner rotation
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I have done many timing belts on VGs and they all have required more tension than just the spring. EM-14 and 15 in the FSM show you the procedure, although I rarely pay much attention to the "70-80 degrees clockwise" rotation on the tensioner with the hex wrench. I just turn it until I feel it has the correct tension, tighten the bolt and test deflection. If the belt is too tight, you will hear a whining noise but as Matt said the belt will stretch over the first 500 miles or so which will often eliminate this noise.
Rechecking the timing belt tension after 1000 miles is highly recommended.