My serpentine belt keeps breaking (shredding)

Tiny
JOESKI62
  • MEMBER
  • 1995 FORD F-150
  • 280,000 MILES
My serpentine belt keeps breaking (shredding). I've changed the Tensioner Pulley but I'm on my fourth belt. I notice my crank shaft pulley is moving up and down while running. Should my crank shaft pulley run true and smooth or is the movement from the harmonic balancer. What can be causing my belts to break?
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Wednesday, April 10th, 2013 AT 10:10 PM

5 Replies

Tiny
ASEMASTER6371
  • EXPERT
Did you replace the tensioner or just the pulley?

The balancer should be true running

Roiy
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Wednesday, April 10th, 2013 AT 10:16 PM
Tiny
JOESKI62
  • MEMBER
I changed the whole tensioner assy. Now my belt keeps jumping a tooth on the crank shaft pulley. My Harmonic balancer is behind the crank shaft pulley so if its not running true I should change the balancer?
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Wednesday, April 10th, 2013 AT 10:30 PM
Tiny
ASEMASTER6371
  • EXPERT
Thats correct

Roy
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Wednesday, April 10th, 2013 AT 10:32 PM
Tiny
JOESKI62
  • MEMBER
I was told there would be play because of the rubber bushing on the balancer which didn't sound right to me. I know what I'll be doing this weekend. Thats the last thing I have left to change. Thank you for your quick response
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Wednesday, April 10th, 2013 AT 10:50 PM
Tiny
ASEMASTER6371
  • EXPERT
No play allowed. Dont know who told you but that is in correct info

Roy
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Wednesday, April 10th, 2013 AT 11:08 PM

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