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Old 05-03-2011, 02:20 AM   #1
Scooby Specialist
Member#: 52123
Join Date: Jan 2004
Chapter/Region: TXIC
Location: Texas
05 WRB STi
04 AW STi GT30R [RIP]

Default Help identifying engine/pulley noise?

Sounds like a chattering sound from maybe the ac compressor pulley? Doesn't change when the AC is turned on or off. No squealing/squeaking noises. It usually is present on cold startup and then is intermittent when warmed up. Any suggestions? Thanks.

For others searching: it ended up being the small timing belt idler.
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Last edited by SupraScooby; 08-03-2011 at 03:30 PM. Reason: issue resolved
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Old 05-05-2011, 12:28 AM   #2
Scooby Newbie
Member#: 227951
Join Date: Oct 2009
Location: Regina, SK, Canada
2004 Impreza WRX


Start removing belts to isolate the noise or check with a long screw driver/stethascope to so see where the noise is coming from.
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Old 05-05-2011, 05:03 PM   #3
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Member#: 199690
Join Date: Jan 2009
Chapter/Region: MWSOC
2004 STi


Check the A/C idler pulley. I just had the same sort of sound and it went away after the car warmed up. It's the small pulley under the tensioner for the A/C compressor.

That what it sounds like to me.
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