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Need help in diagnosing noise

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Old Feb 4, 2015 | 05:10 PM
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St. Jude Donor '12-'13-'14
Default Need help in diagnosing noise

Upon starting and idling,a scraping sound, not a squeel from a pulley or tensioner is heard. The belt turns freely and all seems to be OK. Tried the A/C on defrost and all seems well and no change in the scraping. Need your thoughts and experience. It is so damn cold in the garage so until it warms up a little i'm going nuts as to what could be happening. 99 6mm, all stock 156,000 miles. Well maintained since new .
Any thoughts and/or related information would be most appreciated.

The Big Guy !
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Old Feb 4, 2015 | 06:08 PM
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Remove the belt and start it.See if the noise is still there.If it is,take a good look at the crank pulley to see if it has separated.Could be rubbing the oil pan or the steering rack.Just a suggestion and a simple test.

Last edited by jamieo; Feb 5, 2015 at 03:26 PM.
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Old Feb 5, 2015 | 11:55 AM
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Originally Posted by jamieo
Remove the beltand start it.See if the noise is still there.If it is,take a good look at the crank pulley to see if it has separated.Could be rubbing the oil pan or the steering rack.Just a suggestion and a simple test.
Thank You Jamieo Too cold now, got to wait for warmer temperature
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Old Feb 7, 2015 | 06:01 PM
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Originally Posted by The Big Guy
Thank You Jamieo Too cold now, got to wait for warmer temperature

Removed the accessory belt and found the idler pulley had puked. It was very loud and I swore it was the harmonic balancer rubbing against the oil pan.
Got away cheap this time.
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Old Feb 7, 2015 | 08:50 PM
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Glad you found the problem!
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