I have a used 2002 Impala 3.4 . Theres a strange noise coming from my pulley and alternator area, but goes away or at least quiets when ac is on. What exactly is it, and how can I fix it?

50

Asked by Aug 25, 2014 at 09:20 PM about the 2002 Chevrolet Impala Base

Question type: Maintenance & Repair

I also have a 3,000 mile warranty from my dealer,
and I dont drive much and can't because of the
law with CP licences. When I do, the sound annoys
me especially next to other cars at a light.

14 Answers

66,635

Check your belt idler pulley,if it is good may be alternator bearing.

1 of 1 people found this helpful.
Best Answer
68,695

It's most likely the idler pulley. They are plastic and prone to get noisy as they age. HTH. -Jim

1 of 1 people found this helpful.
50

I watched a YouTube video about both answers, and the noise is similar to a bad pulley. The alternator still has a sku barcode, so I guess its pretty fair.The sound is like almost a scraping, shook spray paint can, until the ac is on.

14,705

It also may be the A/C compressor pulley. Have both checked.

50

I intend to, just dont want to spend money on top of money for one problem.

14,705

Your alternator is on one side of the engine, the A/C compressor is on the other side. By listening, see if you can isolate the sound location. If you put a load on the A/C unit and the sound goes away, chances are that is where the sound is coming from. It just may be as simple as replacing the compressor clutch, much less than the entire unit. If it is from the alternator, a new one may be necessary to replace unless you can find someone to change out the bearings for you. If it is the belt idler pulley, it is a cheap and quick fix. Don't throw money onto hoping to guess the problem, isolate it, and eliminate others.

50

Ok. The 02 Imp is W-Body FWD, so the alternator and pulleys are paralell to the passenger side meaning the engine is sideways. The sound is not hissing or whirring though. All noise is from the left in the front. Engine not smoking at all.So its a variety of things to eliminate.

14,705

If a bearing is going out in the A/c compressor, it will rattle until a load is placed on it. It will sound like a little pea inside a paint can. Ok, stand on the passenger side of the engine and see if you can eliminate the sound coming from the alternator. Have someone inside turn on and turn off the A/c controls and see if the sound is isolated from the A/C compressor. From the information you are giving us, it sounds like either the idler pulley is going out or the A/C compressor due to the rattle going away when it is engaged. It is under warranty? Let the dealer worry about it. If you can isolate it, that will help in getting them to fix it. Be careful by looking at the 3,000 mile warranty and make sure the A/C unit is covered. Some warranties do not cover it.

50

Thanks fellas. This is my first Chevy, and Ive been hearing that this particular model has been a pain to maintain. When o get a break from work, ill first go to AutoZone to be thorough, not that im ignoring you giys advice and send the diagnostics to the dealer. If these are the problems , Ill let ya know.

14,705

Why not take it to the dealer right away? If someone else works on it, it may void the warrany. I always to with the warranty first to save money. Just saying.

1 of 1 people found this helpful.
50

Thinking about after Labor Day. Ill be off work a few days. The dealer told me to take it to Auto Zone first, havent had time because of work.

14,705

Have a nice holiday. I have to go out of state this weekend and not back until the middle of the week. Be safe my friend.

68,695

If you take it to Autozone will the dealer still pay for the repair? Or is he trying to weasel out of a warranty repair? -Jim

50

Just want diagnostics. If I buy the part, labor is no charge. I cant go anywhere alone, unless someone has licence. Ga law says EVERYONE who has class CP cannot drive alone until they pass driving test. I still have like 2700 miles to go. Haha.

Your Answer

Add photo

Related Questions

Impala

Looking for a Used Impala in your area?

CarGurus has 35,581 nationwide Impala listings starting at $899.

ZIP:

Search Chevrolet Impala Questions

Chevrolet Impala Experts

#1 Js08016
Js08016
Reputation 1,820
#2 Danny Wang
Danny Wang
Reputation 1,680
#3 Tom Demyan
Tom Demyan
Reputation 1,660
View All

Related Models For Sale

Used Chevrolet Malibu
1,176 Great Deals out of 79,466 listings starting at $2,500
Used Chevrolet Camaro
353 Great Deals out of 31,259 listings starting at $2,500
Used Honda Accord
1,034 Great Deals out of 67,109 listings starting at $1,000
Used Nissan Maxima
332 Great Deals out of 24,188 listings starting at $1,999
Used Ford Mustang
705 Great Deals out of 44,424 listings starting at $1,500
Used Nissan Altima
1,268 Great Deals out of 74,640 listings starting at $1,000
Used Toyota Camry
1,198 Great Deals out of 83,224 listings starting at $750
Used Chevrolet Tahoe
637 Great Deals out of 32,887 listings starting at $1,500
Used Chevrolet Silverado 1500
1,900 Great Deals out of 182,421 listings starting at $1,595

Used Cars For Sale

2018 Chevrolet Impala For Sale
4,130 listings starting at $23,206
2017 Chevrolet Impala For Sale
70 Great Deals out of 12,090 listings starting at $16,700
2016 Chevrolet Impala For Sale
34 Great Deals out of 1,829 listings starting at $12,970
2015 Chevrolet Impala For Sale
23 Great Deals out of 1,414 listings starting at $10,780
2014 Chevrolet Impala For Sale
64 Great Deals out of 2,554 listings starting at $9,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.