Engine whistle/whine how do you pin point where its coming from?!? - Pontiac GTO Forum
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post #1 of 11 (permalink) Old 09-22-2008, 03:41 PM Thread Starter
 
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Engine whistle/whine how do you pin point where its coming from?!?

Hey guys just a quick question on how you can pinpoint where exactly a noise is coming from your engine. I got the 05 6speed and It's just a small whine noise sounds like its coming from something off the belt but its hard to pin point it and it sounds like it does it more noticeable while its in gear, but any suggestions on how to narrow it down or what I can do? Thanks.

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post #2 of 11 (permalink) Old 09-22-2008, 04:04 PM
 
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You mean the whistle that sounds like a supercharged engine?

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post #3 of 11 (permalink) Old 09-22-2008, 04:28 PM
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If you think it's belt related, remove the belt and run the car for a few seconds and see if the noise stops. If not then put the belt back and and using a long metal rod of some sorts (I use a 3' long screwdriver) with one end on your ear, move the other end around on the engine to try to identify were the sound is coming from. This works for listening to bearings going bad in like water pumps, alternators or idler pulleys too.
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post #4 of 11 (permalink) Old 09-22-2008, 05:34 PM
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It's a serpentine belt. It could be the belt tensioner as suggested previous.

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post #5 of 11 (permalink) Old 09-22-2008, 05:38 PM
 
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I'v read in some other post that the alternator makes the whistleing noise.

I have 95K on mine and it has had it from day one.

Larry

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post #6 of 11 (permalink) Old 09-22-2008, 06:46 PM Thread Starter
 
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Originally Posted by Aramz06 View Post
You mean the whistle that sounds like a supercharged engine?
Yeah i know what noise your talking about that's normal but no it almost sounds like a belt, bearing, or pulley. I mean its not real loud and i dont think it'll effect anything but its just annoying because its loud enough to hear and it just bugs the **** out of me.

2005 GTO M6
2.5" spintech catback
Volant CAI
Kooks LT's w/ off road mids
Red BMR light weight skid plate
Torrid Red SAP Grilles
Clear Side Markers
06 tails
Ported Intake Manifold
Ported Throttle Body
Tuned at CMS 373 rwhp 373 torque
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post #7 of 11 (permalink) Old 09-22-2008, 06:53 PM Thread Starter
 
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Thanks Rukee and Judge I'll look into taking the belt off and checking the tensioner and what not but if I take like a screwdriver or whatever and try and try to feel out the vibration where would be the best place to position it at because i mean i dont want to be an idiot and like put it in a bad spot and with all the moving parts jack something up you know... Like what besides the tensioner would be a key point of interest to feel out in the problem area. Because I didnt look too much into it because I have alot of stuff going on but I'm pretty sure its on the passenger's side towards the bottom.

2005 GTO M6
2.5" spintech catback
Volant CAI
Kooks LT's w/ off road mids
Red BMR light weight skid plate
Torrid Red SAP Grilles
Clear Side Markers
06 tails
Ported Intake Manifold
Ported Throttle Body
Tuned at CMS 373 rwhp 373 torque
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post #8 of 11 (permalink) Old 09-23-2008, 06:30 AM
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The ole screwdriver to the ear test is a tried and true method for checking internal bearing failure on alternators etc. Place the screw driver atop the part you want to check hold it secure and put your ear to the end. If there is a squeal internally it will sing to you.

As far as the belt tensioner, try spraying some WD-40 on it and see if it stops. If it does, then you know what the culprit is.

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post #9 of 11 (permalink) Old 09-23-2008, 06:45 AM
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Do NOT get the WD-40 on the belt though!!!!
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post #10 of 11 (permalink) Old 09-23-2008, 10:37 AM Thread Starter
 
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Good deal thanks for the pointers guys!

2005 GTO M6
2.5" spintech catback
Volant CAI
Kooks LT's w/ off road mids
Red BMR light weight skid plate
Torrid Red SAP Grilles
Clear Side Markers
06 tails
Ported Intake Manifold
Ported Throttle Body
Tuned at CMS 373 rwhp 373 torque
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