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I've replaced idler pulley, tension pulley, a/c clutch, altenator, and belt but my 1999 chevy suburban still sqeaks? What could be wrong?

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Hi Anthony:
If it's in contact with the belt, and rotating, it has to have a bearing or bushing. You did not mention the water pump. Give it a once over. Remove or slack off the belt and see if there is any play or wobble in the water pump. It never hurts to spray some belt conditioner (also called belt dressing) on the belts. If coolant has been spilled on the belts they will squeal in a not nice way.

Posted on Apr 29, 2015

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My 92 chevy blazer is making a loud squealing noise sounds like my belts but its not that I've replaced the belt and the tensioner what else could it be?


Bearings in Alternator, water pump, power steering pump or even a squeal from Vacuum line, EGR diaphram or similar. Check power steering fluid level.



Now when you replaced the tensioner, did you notice more pulleys that were just "there" and not connected to anything? These are idler pulleys and are helpful in routing the belt. They have bearings too!

Pleae rate my info.

Nov 15, 2012 | Cars & Trucks

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I hear loud noise when I turn on air conditioner in my 2001 Chevy Suburban, it only makes noise when I accellerate or push gas in park. No noise when I am idled. But air blows cold still.


Check for wear or other faults all of the following: The belt, fan clutch, Check A/C compressor&clutch for damage. Check A/C compressor for damaged or faulty temperature switch switching compressor off and on too rapidly, or low oil level.Check A/C hoses for metal A/C Lines vibrating against other components under the hood, or faulty blower motor bushings. Hope this helps you out.

Aug 24, 2011 | 2001 Chevrolet Suburban

2 Answers

What makes a belt squeak?


Belts squeak for the same reason tires do when they spin. They are slipping. Something isn't turning as fast as the belt wants it to. On ford it's usually ether the idler sprocket or the tensioner. If you remove the belt and try spinning all of the pulleys by hand.( note the crank wont spin freely) you will usually be able to tell witch ones slipping.

May 14, 2011 | 1999 Ford Taurus

1 Answer

I need a serpentine belt diagram for a 1999 ford escort


SECTION 303-05: Accessory Drive 1999 Escort/Tracer Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 06/06/1998 Accessory Drive Component Locations -2.0L SPI with A/Ca27194a.gif
Item Part Number Description 1 6B209 Belt tensioner 2 10344 Generator pulley 3 8620 Belt 4 3A733 Power steering pump pulley 5 8678 Belt idler pulley 6 2E884 A/C clutch pulley 7 6316 Crankshaft damper

Component Locations -2.0L SPI without A/Ca27193a.gif
Item Part Number Description 1 6B209 Belt tensioner 2 10344 Generator pulley 3 8620 Belt 4 3A733 Power steering pump pulley 5 6316 Crankshaft damper

Component Locations -2.0L Zetecaq0167a.gif
Item Part Number Description 1 10300 Generator pulley 2 19A216 Belt idler pulley 3 3D673 Power steering pump pulley 4 8509 Water pump pulley 5 6B209 Belt tensioner 6 19703 A/C clutch pulley 7 6B320 Crankshaft pulley damper 8 19A216 Belt idler pulley 9 8620 Drive belt NOTE: Drive belts (8620) with automatic drive belt tensioners (6B209) do not require adjustment.
NOTE: When a new drive belt is installed or a drive belt is re-installed after a service procedure, the drive belt does not fully seat into the pulley grooves until engine has run for several minutes.
This vehicle is equipped with:
  • a V-ribbed serpentine accessory drive belt.
  • an automatic drive belt tensioner.
New drive belts must be of the same type as originally installed.
Check the drive belt condition at 96,000 km (60,000 miles) then after every 24,140 km (15,000 miles).

Mar 06, 2011 | 1999 Ford Escort

2 Answers

Sqeaking from the accessory belt drive. could be a bearing in one of the pulleys, the pump, the alt or the belt tension has weakened. It occurs off and on, usually just off idle but sometimes at idle. Is...


common cause is the belt gets worn and stretched, yes the tensioner is suppose to keep its tension but also the tensioner gets weak and all it takes is a couple slips of the belt to harden and you will get a squeal. Spray WD 40 on tensioner, idler pulleys, alternator behind pulley, not on belt or where belt rides on pulleys but at all bearing locations. Did squeal stop? If not replace belt. Usually a chevy water pump will leak, or grind not sqeak unless there is rusty non lubricated so called coolant in it which 1974 maybe but 2007 na im sure you didn't neglect this baby. You can also inspect the belt carefully, possibly buy a can of belt dressing and spray belt but do make sure you use a ratchet and check your belt tensioner for smooth non sticky tension pressure.

Jan 10, 2011 | 2007 Chevrolet Silverado 1500 2WD

1 Answer

2002 chevrolet pick up v6 excessive noise from belts replaced idler and tensioner ,no help power steering works fine ,altenator charging, a/c ok water pump ok rotated altenator, by hand when changing...


I would suspect the altenator, A/C pulley, or the belt. when you checked the altenator and a/c they have to turn smoothly with no play or roughness. If these checked out fine then I would check the belt, they do stretch.

Nov 28, 2010 | 2002 Chevrolet Silverado 1500

1 Answer

Belt diagram


2 valve




3186cf9.gif
Item Part Number Description 1 8679 Belt idler pulley 2 10344 Generator pulley 3 8620 Drive belt 4 3A733 Power steering pump pulley 5 6312 Crankshaft pulley 6 8509 Water pump pulley 7 2E884 A/C clutch pulley 8 6B209 Drive belt tensioner pulley
------------------------------------------------------------------------
4 valve

74aa6ac.gif
Item Part Number Description 1 19A216 Belt idler pulley 2 10300 Generator clutch pulley 3 8620 Drive belt 4 3A733 Power steering pump pulley 5 6316 Crankshaft pulley 6 8A528 Water pump pulley 7 19D692 A/C clutch pulley 8 6B209 Drive belt tensioner pulley 9 19A216 Belt idler pulley

Oct 26, 2009 | 2003 Mercury Grand Marquis

1 Answer

Removed the old fan belt. But don't know hos to


LOOP THE BELT UNDER THE CRANK PULLEY, START WITH THE RIGHT HAND AND GO AROUND THE LEFT HAND SIDE OF THE WATER PUMP, DOWN TO THE POWER STEERING PUMP, OVER THE A/C COMP, UNDER THE IDLER PULLEY, OVER THE ALTERNATOR, AND THEN THE TENSIONER.

ITS EASIEST TO SLIDE THE BELT UNDER THE IDLER LAST AND RELEASE THE TENSIONER.

Jul 10, 2009 | 1996 Chevrolet Suburban

1 Answer

Problem with Altenator belts Etude


the problem is not the altenator. you should have a idler pully and a self adjusting idler tensioner. if thes e go bad the bearings tend to seize up and break belts i would check these first chance you get the tensioner should be spring like and be hard to move back and forth the pulley part of it should spin freely with out makeing a noise. please rate this

Sep 01, 2008 | 1999 Mazda 626

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