Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN







Rattling sounds when ac is off


  Email This Post



usmarine0622
New User

Apr 6, 2012, 12:06 PM

Post #1 of 11 (3368 views)
Shortcut
Rattling sounds when ac is off Sign In

Hey guys my wife has a 2001 Chevy Impala, she noticed that ac wasn't getting cold when she turned it on. I checked the Freon level and it was pretty low so I had it recharged. It works fine besides the fact that when she turns the AC off there is a rattling sound coming from the hood. When she turn the Ac back on the rattling goes away. I'm pretty sure it's the AC compressor because it did not happen when the Freon was low. It just started up when the Ac was recharged. Any thoughts?


Hammer Time
Ultimate Carjunky / Moderator


Apr 6, 2012, 12:08 PM

Post #2 of 11 (3364 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

If it only happens when it's off, then it's likely a bad clutch on the compressor which means new compressor and dryer but that needs to be verified.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



usmarine0622
New User

Apr 6, 2012, 12:17 PM

Post #3 of 11 (3357 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In


In Reply To
If it only happens when it's off, then it's likely a bad clutch on the compressor which means new compressor and dryer but that needs to be verified.


Thanks for the reply, I had a feeling that was the problem but I wanted to get some input first before I went to a mechanic and they tried to tell me that i need to buy half the parts in his shop.


Tom Greenleaf
Ultimate Carjunky / Moderator


Apr 6, 2012, 12:29 PM

Post #4 of 11 (3352 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

A/C clutch bearing would do that and could be replaced or new clutch usually but not always. Whole NEW compressor with a NEW clutch may be needed.

Allowing that too long isn't a maybe it will be a problem such that car is disabled if belt is not just dedicated to just compressor and doubt it is,

T
_________________________________________
Long retired now


Hammer Time
Ultimate Carjunky / Moderator


Apr 6, 2012, 12:44 PM

Post #5 of 11 (3340 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

They may not be far off. Once the system is opened, the accumulator and orifice tube have to be changed. I would try just changing the clutch because the heat generated by the bad clutch will usually take out the front seal and then you will be replacing the compressor anyway along with another clutch that comes with it.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



usmarine0622
New User

Apr 6, 2012, 2:45 PM

Post #6 of 11 (3308 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

ok cool thanks for the reply, ill have it checked out


Tom Greenleaf
Ultimate Carjunky / Moderator


Apr 6, 2012, 11:59 PM

Post #7 of 11 (3288 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

Bite! The accumulator has nothing to do with this so forget that if only the clutch. In fact just trying to replace one can cause unreal other damage so if not mandatory leave it alone. Done - period! Didn't waste years of college not just tech bull to learn this crap so fluck them all! Age takes it toll thoughMad

T
_________________________________________
Long retired now


Hammer Time
Ultimate Carjunky / Moderator


Apr 7, 2012, 6:33 AM

Post #8 of 11 (3278 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

I disagree here. Something made that clutch fail and i would suspect that it was either a compressor locking up or pushing excessively high pressures so yes, you should change the accumulator and orifice tube along with the whole compressor and possibly a condenser too if it turns out to be the reason for high pressure. Most parts suppliers will not guarantee the compressor without installing an accumulator also.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator


Apr 7, 2012, 9:01 AM

Post #9 of 11 (3270 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

I too disagree. Bearings do go bad alone for no reason. Most or the ones my way can be replaced for my cost about $12 bucks plus insane time to get the dang thing off and to a workbench. Some may require recovering refrigerant to do this and whole compressor off. Some snap rings some are "peened" in and can do that - can you?

T
_________________________________________
Long retired now


Hammer Time
Ultimate Carjunky / Moderator


Apr 7, 2012, 9:18 AM

Post #10 of 11 (3264 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

When pulley bearings fail they cause the pulley to lean and rub on the clutch plate which will create heat and heat damages front seal. This is a pressed on clutch and can't even be done without special tools, if you can even find a supplier that sells clutch parts for it.. A complete clutch assembly which is what would be needed, can easily run over $100 when a new compressor with clutch can be bought for under $200




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator


Apr 7, 2012, 9:47 AM

Post #11 of 11 (3258 views)
Shortcut
Re: Rattling sounds when ac is off [In reply to] Sign In

This will fail without some hands on and eyesight inspection of what and why IMO.

Plain English. Do It Yourself for "Motor Vehicle Air Conditioning" is mostly, near always for professionals or leave it alone!

If even disabled some cars need the dang compressor as part of the pulley set up - which is engine and vehicle design not mine but at least that is required in some now many. Disable kits are available,

TomMad




Rattling sounds when ac is off


  Email This Post
 
 






Latest Forum Post
This is a great forum. Thanks to all who post and reply. Blower motor had inter...
2005 Nissan Sentra four cylinder 1.8F. Several times now the engine just quit...
hi i got a 84 chevy c10 305ci with a turbo 350 trans. and i installed a fuel psi...
Got a question about a 1999 Gmc Jimmy 4x4 4.3 with a 4l60E I bought about 6 mon...
Hi, A couple weeks ago I tried to use the wipers and nothing happened. The next ...
1998 Toyota Rav 4 with 350k A/C would work and then stop working then after car...

Feed Button


Used Car Search
Used Car Price Ranges:
Under $5,000
$20,000
$35,000

$10,000
$25,000
$40,000
$15,000
$30,000
$45,000
Over $45,000
Search used Cars By Manufacturers:
Used Acura
Used Audi
Used BMW
Used Buick
Used Cadillac
Used Chevrolet
Used Chrysler
Used Dodge
Used FIAT
Used Ford
Used GMC

Used Honda
Used Hyundai
Used Infiniti
Used Jaguar
Used Jeep
Used Kia
Used Land Rover
Used Lexus
Used Lincoln
Used Mazda
Used Mercedes-Benz

Used MINI
Used Mitsubishi
Used Nissan
Used Porsche
Used Saab
Used Scion
Used Subaru
Used Suzuki
Used Toyota
Used Volkswagon
Used Volvo
2010 Honda Civic
$15,770
2004 Jeep
$8,991
2012 Mustang
$22,990
1997 Honda Cr-V
$4,490
2010 Toyota Prius
$17,496
2010 BMW 328
$26,980




Automotive Forum Categories
Automotive Repair
Auto Body Repair and Refinishing
AC Auto Repair Help Forum
Automotive Wiring and Electrical

Auto Insurance and Car Financing
Automotive World
Brake Systems
Car Stereo Repair Advice
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair

Steering and Suspension
Tricks of the Trade
General Discussions
Car Shows and Events
The Bargin Bin
Motor Vehicle Inspection
Car Care Tips
Traffic Ticket Help
Car Racing

Gasoline, Motor Oils, Concept Cars
Remote Control Cars and Vehicles
Truck Repair
Truck Repair Advice


Truck Engine Repair
Truck Suspension Repair
Motorcycle Repair
Motorcycle and ATV Repairs

Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Seat Repair
Car Forum Posts - Sitemap


Search for (options) Privacy