Quote:
Originally Posted by Steve 940
Talking of over tight belts, have been trying to find guidance on checking tension, but Haynes mentions absolutely nothing.
Can recall back in 80's when working on various cars the manuals used to give amount of deflection, and where to take this measurement from??
Cheers
Steve
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Ball park deflection on V belts is 9-12mm on the midway point of the longest straight section under "moderate" thumb pressure.
The poly-v belts (flat with ribs) should be much tighter so you can twang them like a bass guitar string and if you're musically talented, play the opening riff of Smoke on the water.
Over-tight V belts can cause bearing failure on water and PAS pumps, alternators etc. Also if a car has been laid up, the bearings can Brinnell and deteriorate but usually they are noisy before seizing. When i say noisy, i have a clutch bearing on my AC compressor on my other beast and it sounds like a noisy supercharger now!
