Mitsubishi 3000GT During it's production run, and after, the 3000GT was a pure sports car offering forced induction and all wheel drive, as well as smooth aerodynamic styling.

loud screeching

Old May 9, 2007 | 10:29 AM
  #11  
Dusty Eclipse's Avatar
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Joined: Feb 2007
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Default RE: loud screeching

ORIGINAL: underpressure2003

at the autoparts stores they sale stethescope to hear noise for belts or pullies for leaks or squeaks and if you do not want to u can go the cheap way by cuting a water holes of 2 feet and you can hear it quarented sounds stupid but it works belive me
This looks like it was badly translated from korean or something...
 
Old May 9, 2007 | 10:37 AM
  #12  
silvercoupe97's Avatar
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Default RE: loud screeching

I agree, check the accessory belt tension. Try to move the accessory pulleys by hand.
Another thing, turn everything but the car off, at idle, turn the steering wheel all the way to the stops (both ways). If that doesn't make the squeal, turn on the A/C and turn the wheel. If that doesn't work, hold the rev at 2k and repeat the above steps. Go up in revs and hold while doing the steps until it does it again. This is to eliminate the PS and A/C belts. A buddy at the engine bay can help too.
 
Old May 9, 2007 | 11:15 AM
  #13  
thestealth's Avatar
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Default RE: loud screeching

More than likely it is a belt. 1st, check the belt tension, if it is loose, tighten it (them). Careful not to over tighten the belt or you could wear out the bearings in the accessory or tensioner/idler. If it is not loose, spray each belt (one at a time) with WD40, if the squeak goes away, replace that belt.
One belt runs the power steering pump, the other runs the alternator/air conditioner.
 
Old May 9, 2007 | 03:55 PM
  #14  
kornkid1215's Avatar
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Default RE: loud screeching

i had that happen to me but it was my idler pulley... it was like a loud schreeching noise.. i oiled the pulley a couple times and it stopped you could always give that a try
 
Old May 9, 2007 | 06:23 PM
  #15  
gangstar4209's Avatar
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Default RE: loud screeching

The screeching comes up more when the a/c is on. I guess it first started since the weathers been hot. I WD40'd the pulleys, and so far I think it helped.
 
Old May 9, 2007 | 10:01 PM
  #16  
94 3kgt sl's Avatar
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Default RE: loud screeching

what about the clutch bearing? sometimes that can make a loud screaching noise when its about to go or breaking.
 
Old May 10, 2007 | 08:26 AM
  #17  
thestealth's Avatar
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Default RE: loud screeching

The bearings on the tensioners/idlers are sealed units. The WD40 will only be a temp fix.
 
Old May 10, 2007 | 04:01 PM
  #18  
94 3kgt sl's Avatar
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Default RE: loud screeching

sry i didnt see the post before when i posted. now i feel like i was leading u in the wrong dirsction. haha sry.
 
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