If the sound is actually the water pump rather than the
tensioner (hard to tell the difference) it would make sort of a
After R&R belt, pump and tensioner on my '91 100Q 5cyl last
December it took to making a whining noise at idle when cold but
quit when warmed a bit.
The belt tension is checked like you say with the 90 degree
twist but even the it is a mater of how hard it is to twist.
Another way I test it to look for about 3/8 to 1/2 inch of flex
in the belt between the water pump and the cam pulley.
The bearings in the tenwioner are sealed and do not need
'91 100Q 5spd
You guys were right. I had the belt to tight. Loosened it to have an
easy 3/8 inch deflection and the roller noise is gone. This was the
first belt I have replaced. I have done timing chains but you don't
adjust them. Now I know how to replace timing belts the correct way.
Thank you for the help.
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