How do I get the right tightness on the idler pulley bolt?

1991 CHEVROLET SUBURBAN
140,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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GREGG SMITH
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I am replacing my serpentine belt and the idler pulley and tensioner pulley. The idler pulley felt hand snug only when I loosened the bolt. I put the bolt , spacer, and o-ring in place and went to tighten it. It goes from loose with pulley play to tight and the pulley won't turn in a small window of tightening. I have the o-ring all the way down on the bolt.
Sep 14, 2020 at 12:39 PM
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JACOBANDNICKOLAS
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Hi,

One of two thing is happening. First, the bearing in the new idler is frozen and won't turn, or something isn't together correctly. In the pic below, I circled the inner portion of the bearing. There should be a spacer that fits into that bearing. Do you have that properly aligned into the bearing?

Let me know. Also, if you can, take a pic of what you have so I can see it.

Take care,
Joe
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Sep 14, 2020 at 5:46 PM