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

1991 CHEVROLET SUBURBAN
140,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
Avatar
GREGG SMITH
  • MEMBER
  • 1 POST
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
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Sep 14, 2020 at 5:46 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.