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#1 |
Registered User
Join Date: Mar 2009
Location: Memphis, TN
Posts: 7
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mystery squeel at start up
I have an 86 Chev PU with 305 V8 that I bought about a 2 months ago.
Has about 107K original miles with no apparent history of any major engine work. At start up there is a high pitch squeel that lasts about 20 seconds to 1 minute and then goes away. It only seems to occur at cold starts. At times the squeel is very load and can really hurt your ears. I have done all of the following and cannot figure out what the source is: 1. replaced water pump & hoses 2. replaced alternator 3. replaced belts 4. disconnected the air pump 5. disconnected power steering Anyone have any ideas on what the problem could be? Thanks |
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#2 |
Registered User
Join Date: Dec 2008
Location: Wahpeton ND
Posts: 34
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Re: mystery squeel at start up
Tighten your belts. Sounds like they are the problem.
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Rule #1: If it's stupid but works, it's not stupid. |
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#3 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,294
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Re: mystery squeel at start up
the belts may have been loose for a long time and have literally polished the pulleys so that before they get warmed up from the motor heat, they slip and squeal.. you need to take off the belts and use a real light emory cloth and just take the shine off the pulleys then re install your belts and tighten to the proper tension and your squeal should go away
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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#4 |
13lazers' blazers
![]() Join Date: Jul 2005
Location: San Pedro, CA
Posts: 152
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Re: mystery squeel at start up
Yup I had the same problem. Make sure all of the required belts are installed. Sometimes the AC compressor binds up, make sure its turned off.
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#5 |
Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: mystery squeel at start up
You could always remove the belt and spin the pulleys to make sure there is no binding. While belts are removed start engine to verify the noise goes away. If the noise does go away remove the shine from the pulleys like Old Rusty said. I use a scotch brite pad (red).
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#6 |
Badass
Join Date: Jan 2009
Location: lox. fl
Posts: 4,586
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Re: mystery squeel at start up
old rusty is right
i learned this back when i use to soup-up lawnmowers get them tight or they will howl like a dog until they heat up or when they get wet lol
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#7 |
Registered User
Join Date: Feb 2009
Location: washington the state
Posts: 730
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Re: mystery squeel at start up
spray belt dressing on them thats the easy way to find out if you need to pull the belts up to buff the pulleys
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#8 |
78 Big10 454
![]() Join Date: Jul 2008
Location: Pismo Beach, CA
Posts: 838
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Re: mystery squeel at start up
Had the same problem in my truck. It was the A/C compressor.
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#9 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: mystery squeel at start up
I've seen this many times.....fan clutch....replace it and problem solved.
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#10 |
Registered User
Join Date: Nov 2008
Location: Lusby, MD
Posts: 563
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Re: mystery squeel at start up
i just get some dish soap and squirt it on the belts makes it smell real good at start up if it's a belt squeal it should go a way then tighten all belts but i would say clutch fan, or ac compressor going
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