loud squeal noise when certain rpms? - Mustang Evolution

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Old 04-02-2012, 05:47 PM   #1
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loud squeal noise when certain rpms?

Hey what's up guys my cobras been making loud squeal noises at higher rpms I changed the belt ,(motocraft belt), idler pulley, and the belt tensioner but still making the noises I did notice after driving for awhile it does stop making the noise . Mostly does it when car is cold or hasn't been driven for awhile . What could it be ?
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Old 04-03-2012, 02:27 AM   #2
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Some possibilities to check are supercharger, water pump and alternator.
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Old 04-03-2012, 08:56 AM   #3
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My bad forgot to put the year is a 97 no supercharger
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Old 04-03-2012, 02:01 PM   #4
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Yeah, sounds like a pulley to me.... Could be any idler pulley.... May take two people to diagnose.
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Old 04-03-2012, 07:32 PM   #5
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Took the belt off and notice the power steering pulley does have play it moves around do I need to change the pulley or the power steering pump ?
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Old 04-04-2012, 02:45 PM   #6
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Bearing is probably bad. If the power steering pump doesn't make noise and doesnt leak then just pulley and new bearing should be good.... However, I would price the difference between parts and a new pump. If its high millage and not much extra money I'd go ahead and replace the pump.
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Old 04-04-2012, 03:27 PM   #7
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The power steering doesn't leak the only noise I hear is the squeal sounds like crickets at war lol
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Old 04-04-2012, 04:34 PM   #8
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Quote:
Originally Posted by Cobra209
The power steering doesn't leak the only noise I hear is the squeal sounds like crickets at war lol
Lol!!
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Old 04-04-2012, 04:42 PM   #9
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I also noticed my battery had a little bit of acid on top can it maybe just be my Alternator is throwing high voltage which is causing it to make that noise?

---------- Post added at 01:42 PM ---------- Previous post was at 01:39 PM ----------

Will a Alternator that's going out cause that ? To make that noise
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Old 04-05-2012, 06:58 AM   #10
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Not from what you described..... Normally an alternator going out is all through the RPM range and louder as you go up in RPM's. Almost sounds like a roots blower, lol
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Old 04-05-2012, 08:06 AM   #11
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Lol hmm so I should just go ahead an switch out the pulley and bearing how hard is it too switch it out ?
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Old 04-05-2012, 01:34 PM   #12
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As long as the bearing isn't pressed in it shouldn't be too bad... If your only replacing the bearing. But it should come preassembled new bearing and pulley together.

---------- Post added at 11:34 AM ---------- Previous post was at 11:33 AM ----------

The worst part is getting the tools to do it.... Since the alternator pulley move freely it can be a pain to get on and off
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Old 04-05-2012, 01:44 PM   #13
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Yea ima have to get that done then
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Old 04-06-2012, 06:42 AM   #14
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But like I said, check the prices... It may not be too much more for the complete pump..... And that's easier to take off and put on.
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