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A non-op belt will take a "set". When it's run again it does not like to be unbent. A few hundred passes around the pullies and being reversed over the water pump fractures the rubber and the backing. Then it breaks.
The 90 degrees works on the long pass for the balance belt. Timing belt is too wide and close to the reverse at the water pump.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
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