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Old 11-21-2005, 03:20 PM   #1
ScoobyNubieToo!
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Question Questions about WRX AC pulley

I was looking around under the hood of my WRX and I noticed that the AC pulley tensioner was broken. I picked up the part at local Subaru dealer and now I have a question: Is that pulley suppose to turn when the AC is going or is it a static pulley that does not spin? The other two pulleis appear to spin but I'm not sure about this one.
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Last edited by ScoobyNubieToo!; 11-22-2005 at 09:39 PM.
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Old 11-25-2005, 09:09 AM   #2
ride5000
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all pullies in contact with moving belts should spin!
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Old 11-25-2005, 09:44 AM   #3
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Quote:
Originally Posted by ride5000
all pullies in contact with moving belts should spin!
Hmmm....I better have this looked at then.
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Old 11-25-2005, 09:52 AM   #4
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Are you referring to the AC compressor itself? If so the compressor has an electric clutch on the pulley that drives it, so when the AC is not running only the outside (the part that contacts the belt) will be turning, while the inside (which is actually attached to the compressor shaft) will not turn until the clutch engages.
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Old 11-25-2005, 10:56 AM   #5
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Quote:
Originally Posted by Mulder
Are you referring to the AC compressor itself? If so the compressor has an electric clutch on the pulley that drives it, so when the AC is not running only the outside (the part that contacts the belt) will be turning, while the inside (which is actually attached to the compressor shaft) will not turn until the clutch engages.
Actually I'm refferring to the bottom pulley. The AC belt loops around 3 pulleys: The Crank Pulley, The top ac pulley (the one you are referring too) and the lower ac pulley. The bottom pulley does not appear to spin at all. This is the pulley that had the pulley tensioner bracket that broke and I replaced. Probably anyone who's bored and looks at their engine compartment can probably tell me if there's spins.
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Old 11-25-2005, 11:14 AM   #6
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Does that pulley spin if you turn it by hand with the belt off? If it doesn't it's NG and has to be replaced. It would make sense actually, the pulley bearing probably seized and that's why the bracket broke. Check it and if it's bad (which it sounds like it is) make another trip to the dealer for a new pulley.
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Old 11-25-2005, 05:03 PM   #7
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Quote:
Originally Posted by Mulder
Does that pulley spin if you turn it by hand with the belt off? If it doesn't it's NG and has to be replaced. It would make sense actually, the pulley bearing probably seized and that's why the bracket broke. Check it and if it's bad (which it sounds like it is) make another trip to the dealer for a new pulley.
Thanks....I'll check it out.
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Old 11-26-2005, 12:25 AM   #8
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....loosen the nut a bit....
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Old 11-26-2005, 10:16 AM   #9
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Quote:
Originally Posted by Uncle Scotty
....loosen the nut a bit....
See, I wasn't sure if the nut should be loose......Is the tensioner pulley bracket the sole part that will keep the tension because it seems like a pretty week part.
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Old 11-26-2005, 11:22 AM   #10
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...if it is gorilla'd the pulley won't turn, NO????
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Old 11-26-2005, 11:48 AM   #11
ScoobyNubieToo!
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Quote:
Originally Posted by Uncle Scotty
...if it is gorilla'd the pulley won't turn, NO????
But I wasn't sure if that pulley is suppose to turn....but then again I guess they wouldn't have put a pulley there if it was meant to turn.
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