Air Conditioning Makes Grinding Noise, Shakes Entire Car - Club Lexus Forums

Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC430 - 2nd Gen (2001-2010)
Log In 

Air Conditioning Makes Grinding Noise, Shakes Entire Car

Thread Tools Search this Thread
Old 07-03-12, 07:14 AM   #1
Lead Lap
Trader Score: (0)
Join Date: Jan 2010
Location: NY
Posts: 443
Exclamation Air Conditioning Makes Grinding Noise, Shakes Entire Car


I have a high-mileage (130K+) 2002 SC430. My air conditioning typically works well, but sometimes if I turn the AC on when engine is not warmed up, the AC causes the car to make an un-natural loud grinding noise and almost violently shakes the entire car.

If I start driving in this situation it does not seem to make a difference, the car continues to shake somewhat violently when in motion (along with the loud sound from the engine).

To remedy this, I turn the AC off, drive for a little bit, then turn it back on... and BINGO, the engine is as silent as ever (except for a faint squeaking sound which seems to be always present when AC is on, barely noticeable).

Being a convertible, I rarely turn the AC on, but when I do it blows cold as it should. I recently replaced both engine mounts and the transmission mount on this SC430, so I figure the car shouldn't be shaking so bad, something unnatural must be going on.

If anyone has any thoughts on what this could be I would very much appreciate it.
jasone36 is offline   Reply With Quote
Old 07-03-12, 10:09 AM   #2
Lexus Champion
Trader Score: (0)
Join Date: Aug 2006
Location: Texas
Posts: 1,916

Is it a grinding or squealing noise (like a belt slipping)?
Harold57 is offline   Reply With Quote
Old 07-03-12, 10:19 AM   #3
Lead Lap
Trader Score: (0)
Join Date: Jan 2010
Location: NY
Posts: 443


The primary issue is the grinding noise (almost sounds like an air compressor which is having a tough time keeping up with a load).

I also have a very faint squealing noise when the AC is on, but that has always been present and there are no other accompanying issues with the squealing noise.

Any help is appreciated,
jasone36 is offline   Reply With Quote
Old 07-03-12, 12:45 PM   #4
Lexus Champion
Trader Score: (0)
mrblister's Avatar
Join Date: Nov 2007
Location: Pa
Posts: 1,918

Check Serpentine Belt , Tension pulley, air cond clutch .
2005 SC430 Pebble Beach nav tool back up camera vias sirius radio daizen front & rear anti sway greaseable zerks blitz throttle controler windscreen deflector 8 disk dvd trunk changer dvd/tv tuner in glove box r1 slotted & drilled rotors,axis pads 20 " donz genovese staggered toyo t1 proxies toms tower strut bar cnc aluminum frame stiffiner plates lux link remote start remote top 1/4 window mod phone hack & beat sonic nav overide lots of led bulbs lexus logo door projectors 2004 GX470
mrblister is offline   Reply With Quote
Old 07-03-12, 03:23 PM   #5
Pole Position
Trader Score: (0)
husker741's Avatar
Join Date: Aug 2011
Location: Nebraska
Posts: 269

I had a similar noise on my old GS400 with over 170,000 miles. I think it turned out to be the air compressor belt. Every time I would have the air conditioning on, with the A/C (air compressor) button on, I would have a similar noise, but then I would turn the air compressor off, with the air still blowing, the noise would go away. The air compressor is the thing that takes away the humidity and musty smell from the air being blown around the car.
2002 SC430 Indigo Ink with Ecru.
Custom exhaust w/ resonator delete.
Matte black grill and badging.
OEM "Star" Chrome Rims.
Michelin Pilot Sports.
Red Tail Light Tint.
Debadged Grill.
husker741 is offline   Reply With Quote
Old 07-03-12, 04:48 PM   #6
Pole Position
Trader Score: (0)
vicsis250's Avatar
Join Date: Jul 2012
Location: Alhambra, CA
Posts: 285

check you belt mine did that noise when it was cold
vicsis250 is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
A/C Compressor - violent rumbling and shaking emg2919 SC430 - 2nd Gen (2001-2010) 3 08-03-15 03:05 AM
Need help, loud bang diff/driveshaft/controlarm? Norman9208 Suspension and Brakes 2 07-04-15 10:24 AM
97 LS steering wheels shakes above 55mph,ONLY W/ A/C ON!!!!!???? mattylex77 LS - 1st and 2nd Gen (1990-2000) 8 05-03-14 09:56 PM
If Your SC430 Shakes When Starting Engine - You Need New Motor Mounts jasone36 SC430 - 2nd Gen (2001-2010) 7 11-21-12 08:25 AM
violent shaking Och GS - 1st Gen (1993-1997) 10 12-27-04 04:20 PM

ac, air, car, conditioner, grinding, lexus, loud, make, makes, noise, sc430, scraping, shaking, sound, turn

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 06:37 PM.

Copyright © 2000-2015 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS

Get all contact info