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Hello, i have a 1984 pontiac fiero that was missing the belt tensioner pully. i bought one online, along with the hanes repair manual but there is no pic of it in the book. it looks like the crank pully(if that is the correct name)the bottom one,is like pointing the belt toward the motor. i lined it up as close as i could without the belt hitting at the alternator but after revving to 3500 rpm i could see it was starting too fray the outside edge of belt on right. i'm at a loss, i've been looking for a car like mine so i can physically look at it, but so far no go. anyway, thank you for your time.

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Posted on Jan 02, 2017

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SOURCE: hi i just bought a 1984 pontiac fiero. drove it

I own an 86 v6 fiero, not an 84 4-cyl like yours probably is.
If you have the old belt, and it broke in one place, just wrap it around the alternator or whatever pulley you were talking about and see where it reaches in a snug position (as it was approximately installed before it snapped)

If there are two pulleys on the same shaft, just pick whichever one is square to the other connecting pulleys. Or just check to see if one shows signs of use or is rusted/dusty (like it hasn't been used recently).

How many pulleys are there total? Water pump, alternator, drive, a/c...4 total? One serpentine belt for all? Give me some more info
and I'll let you know what to do if you haven't figured it out by now

Posted on May 28, 2010

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