Date: Sat, 18 Dec 1999 15:26:31 GMT
From: djtcznopsamanet.com (Dan Timberlake)
Subject: Re: Squealing


Did the squeal start very soon after you changed the belts? Then they are probably too loose. It less likely that an alternator or water pump bearing happened to wear to the point of squealiness just as you were closing the hood after the belt replacement. A good repair manual will describe how far each belt should deflect to a particular pressure at mid span. If the deflection is greater than specified it indicates the belt is loose. Long belt spans deflect more evne when properly tite, so may invite over-tightening which can shorten ball bearing life a lot. Your 15 year old water pump, alternator, power steering pump and AC compressor may be due for retirement soon anyhow. Think how guilty you will feel when they fail if you don't KNOW if your belts were tightened properly. Loose belts slip, and slipping belts squeal. Too tite belts shorten alternator, water pump and ?? bearing life. Spray a little water or windex on each belt with the engine running. The squeal will change (could be louder OR quieter) when the noisy belt is baptized. It will wear off in a few minutes. Did you fumble the can and douse the belts with oil when you did the oil change at the same time you did the belt replacement? Oily belts slip too, but are less likely to squeak. Belt Alignment - Each belt should leave and enter each pulley at 90 degrees. On some cars with many grooves or multiple belts it is possible to pick a groove 1/2 inch to one side of the right one. A belt sliding into a pulley off center can make lots of noise. If the belts are tensioned properly, and aligned properly, and the water pump bearings are squeaking, you need to replace the pump. Not many bearings can be re-lubricated these days. On Thu, 16 Dec 1999 04:13:50 GMT, dacisnopsam.com (Dave Pritchard) wrote: >Any idea's what might cause squealing in my 1984 900, i just changed the >belts. Can a water pump make this squealing noise, and if so, what can i do >about it??? Any help would be appreciated. > >Thanx, > >Dave Pritchard

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