Barely turning pulleys. Cut belt off, all pulleys are free. Can't figure out what would be holding the belt from turning.
Mar 12, 2023 at 10:39 AM
Loud squealing from Serpentine belt?
2004 BUICK RENDEZVOUS
UNCLJEFFY
- MEMBER
- 1 POST
Advertisement
JACOBANDNICKOLAS
- ✓ASE Certified Mechanic
- 110,194 POSTS
Hi,
If all pulleys are free, the belt is likely to be loose or the A/C compressor is on and is failing. When everything is off, the A/C clutch will allow the pulley to spin freely. When the system is engaged (A/C or Defroster), the A/C clutch locks and engages the compressor.
When you removed the belt, was it tight? If you have already replaced the belt, does it seem like the belt tensioner is working as it should? If it is on, make sure the HVAC system is completely off and see if the sound is still present.
Let me know what you find.
Joe
If all pulleys are free, the belt is likely to be loose or the A/C compressor is on and is failing. When everything is off, the A/C clutch will allow the pulley to spin freely. When the system is engaged (A/C or Defroster), the A/C clutch locks and engages the compressor.
When you removed the belt, was it tight? If you have already replaced the belt, does it seem like the belt tensioner is working as it should? If it is on, make sure the HVAC system is completely off and see if the sound is still present.
Let me know what you find.
Joe
Mar 12, 2023 at 3:19 PM
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.