Question about 1999 Buick Regal

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Noise coming from ac compressor

Sounds like a metal to metal sound on bottom ac unit\

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The clutch pulley on the a/c is bad

Posted on Dec 07, 2012

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1 Answer

Whine noise


Remove the drive belt to the ac compressor and spin the pulley by hand .If it feels rough or can be moved sideways then replace the bearing in the pulley (it can be separated from the compressor with out opening up the system)

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My 1998 sebring 6cyl makes a metal on metal noise on the side of my engine by the belts i tried greaseing all the pullys and i used belt noise sparay but it becomes lower and then it becomes higher ???...


sounds to me from the brief description like you have either a water pump rattling, or a timing chain coming slack. Is the noise coming from the alternator? Never grease pulleys, ever. also the stop squeak spray is bad for your belts. Don't know why they even sell it. If you listen carefully you may be able to pin point the rattle. Is this a tick tick tick, or a rattle rattle rattle? Does sound like a water pump rattle or timing chain slap though. Hope this helps

Jan 14, 2013 | Cars & Trucks

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Compressor makes a loud squeeky noise


Could just be a worn belt or faulty or loose tensioner. Does it only make noise when AC compressor kicks in? If it's not a metallic sound, and sound more like a screech/squeel, then I'd look close at belt condition, and tension.

Apr 05, 2012 | 2006 Dodge Grand Caravan

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2002 dodge stratus making very loud noise sounding like metal to metal seeing metal shavings on underpin near ac unit. i can visually see the ac pulley wiggling very hard and that is where the noise is...


There are two companies that I've heard of that make a bypass pulley. One is Dorman the other I can';t remember. Both require that the compressor be removed and the pulley replaces it so you can run the same belt and configuration. You'd need to check with your local parts house to see if they make one for your engine. Most factory systems don't allow for a bypass... the belt usually ends up hitting something and not working.

Jun 27, 2011 | 2004 Dodge Stratus

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My 2001 pontiac sunfire 2.2L is making a clicking sound when it runs. what is making that sound? Is it the valves being worn or is it the valve springs being worn...


are you sure it is a clicking noise the 2.2 engine is bad for the ac compressor clutch going bad and making a metal to metal rubbing noise. the way to check this is while the car is running turn on the air conditioner and see if the noise stops if so all it needs if the ac compressor changed or bypassed till the spring. hope this helps.

Jan 02, 2011 | 2001 Pontiac Sunfire

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There is a squeal sound (high pitch) coming out of


The seal on the AC compressor has probably failed and allowed all the refrigerant and lubricant to be lost. This allows the bearing to run dry and now it is failing and making noise.

1. You could have the AC repaired, the compressor repaired or replaced and the system refilled.

2. You could have a mechanic disconnect the system and possibly remove the compressor (only if this model does not use a belt that relies on the compressor being in place).

3. It is probably way too late to try to refill the AC system with R134a refrigerant as it would just run out past the failed seals.

If anyone has an AC unit that just recently stopped making cold air they should attempt to recharge the unit (if it uses R134a - check your manual or underhood stickers). I just did and saved my compressor and AC unit from further damage.

Jun 17, 2009 | 1996 Jeep Grand Cherokee

2 Answers

Grinding sound when running a mechanic said its timing chain..


First question. IS IT NOISY ONLY WHEN THE A/C IS ON ? If yes , its the compressor, if not could ne the A/C compressor clutch bearing. Best found using a " mechanics " stethoscope such as a doctor uses to pinpoint the noise. Hope this helps

Jun 14, 2009 | 1998 Chevrolet Cavalier

1 Answer

Screeching noise, then a/c stops blowing cold air. Still blows air, just not cold air.


it could be the air conditioning clutch going out. to check turn your car on and idle it with ac on and hood open. at the ac compressor it will have a pulley on it with a clutch that engages when the air conditioning is on. if it engages and disengages it can be the clutch itself has gone bad, the ac clutch will also disengage if there is not enough freon in the ac system, will also engage and disengage if the pressure gets too high in the ac system. Depending on the year of the vehicle it will disengage at full throttle and come back on when you are not at full throttle.
If it is a metallic sounding screech for example take a coke can and drag it across pavement kind of sound it could be a bad compressor or a bad ac clutch. If it is a more rubbery sound for example a car spinning its tires kind of noise it could be a loose belt.

1. Check to make sure all belts are tight under hood
2. start car and look at ac compressor to make sure compressor pulley is turning and that the fan clutch is engaged spinning


Aug 09, 2008 | Mercedes-Benz 400-Class Cars & Trucks

1 Answer

The ac makes a noise


the problem is that someone didnt put enough oil in the a/c system so pretty much you need a new compressor u can probly get a reman. for about $150

Jul 23, 2008 | 1998 Nissan Frontier

1 Answer

Additional noise


Sounds like the a/c compressor or clutch is worn.My guess would be the clutch,this part mounts on the pulley of the compressor.

Jun 16, 2008 | 2004 Audi A6

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