MR2 Squeals LOUD when AC is turned on?

PCx188 · 10-11-2009, 02:23 PM

ok, my MR2 runs fine for now...but i am having AC issues. over the past summer, i noticed that my AC no longer blows cold. another issue is that when i turn the AC on it squeals really loud. the squealing shuts off as soon as i turn off the AC...

what do i need to look into to get my AC blowing cold again and to remove the scary squeal issue?

the squealing is especially loud when i turn it on while the car is moving.

fvillota · 10-11-2009, 02:35 PM

Well if you get no cold air i would check if the compressor is turning on.
it might have seized and making the belt squeal causing you to have no a/c and that loud noise.

things that can cause it to do that is.

loose belt.
glazed belt.
seized compressor
oily belts.

things that can cause no a/c
broken compressor (seized or not compressing)
a/c leak somewhere

PCx188 · 10-11-2009, 02:37 PM

thank you. whats the easiest way to check if the compressor actually turns on?

also, is the AC compressor something i can replace without dropping or tilting the motor? if not, i will have to look into doing that while im doing my timing belt change.

fvillota · 10-11-2009, 02:42 PM

turn it on and look at it and make sure the front part of it is spinning with the rest on the assembly where the belt is on.
if the front part is not spinning its not turning on.
the belt just moves the pulley but the magnet that attracts the front part is not engaging.

also make sure the belt is not loose or oily or glazed (shiny like a donut lol)
if it is replace it.

PCx188 · 10-11-2009, 02:55 PM

damn replacing that belt requires to tilt the motor! is there a better way to replace that belt without having to tilt the motor?

nocashrider · 10-12-2009, 08:32 AM

you dont need to tilt the motor to replace the belt all you have to do is take the altenator belt off and then your able to get to the ac belt after loosen up the ac belt tightener

Ben · 10-12-2009, 04:38 PM

If it is squealing only when you turn it on, it is either the belt as mentioned or the compressor clutch. If the belt is fine and tight, the clutch would be the problem.

conor · 10-13-2009, 06:33 PM

Squealing belt = belt slipping. You probably need to replace the belt. Slipping belt = AC compressor not operating at full speed, which means you'll have poor AC performance.

Quote:

Originally Posted by PCx188

damn replacing that belt requires to tilt the motor! is there a better way to replace that belt without having to tilt the motor?

No, it doesn't.

PCx188 · 10-13-2009, 06:50 PM

Quote:

Originally Posted by conor

No, it doesn't.

so i can replace that belt without having to tilt the motor or remove any motor mounts? do i do it from the top or do i have to go in from the bottom of the car?

nocashrider · 10-14-2009, 07:16 AM

both you will have to be under the car to slip the belt on the crank shaft pully and over the car to slip it on the ac compressor and tighten it up

10-11-2009, 02:23 PM	#1 (permalink)
PCx188 PCFIVEZ Join Date: Jan 2006 Location: New York City Posts: 801 Thanks: 24 Thanked 4 Times in 4 Posts iTrader Rating: (7/100% )	MR2 Squeals LOUD when AC is turned on? ok, my MR2 runs fine for now...but i am having AC issues. over the past summer, i noticed that my AC no longer blows cold. another issue is that when i turn the AC on it squeals really loud. the squealing shuts off as soon as i turn off the AC... what do i need to look into to get my AC blowing cold again and to remove the scary squeal issue? the squealing is especially loud when i turn it on while the car is moving.

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10-11-2009, 02:35 PM	#2 (permalink)
fvillota Did you just press that? Join Date: Feb 2008 Location: Miami Posts: 2,539 Thanks: 73 Thanked 52 Times in 52 Posts iTrader Rating: (11/100% )	Well if you get no cold air i would check if the compressor is turning on. it might have seized and making the belt squeal causing you to have no a/c and that loud noise. things that can cause it to do that is. loose belt. glazed belt. seized compressor oily belts. things that can cause no a/c broken compressor (seized or not compressing) a/c leak somewhere

10-11-2009, 02:37 PM	#3 (permalink)
PCx188 PCFIVEZ Join Date: Jan 2006 Location: New York City Posts: 801 Thanks: 24 Thanked 4 Times in 4 Posts iTrader Rating: (7/100% )	thank you. whats the easiest way to check if the compressor actually turns on? also, is the AC compressor something i can replace without dropping or tilting the motor? if not, i will have to look into doing that while im doing my timing belt change.

10-11-2009, 02:42 PM	#4 (permalink)
fvillota Did you just press that? Join Date: Feb 2008 Location: Miami Posts: 2,539 Thanks: 73 Thanked 52 Times in 52 Posts iTrader Rating: (11/100% )	turn it on and look at it and make sure the front part of it is spinning with the rest on the assembly where the belt is on. if the front part is not spinning its not turning on. the belt just moves the pulley but the magnet that attracts the front part is not engaging. also make sure the belt is not loose or oily or glazed (shiny like a donut lol) if it is replace it.

10-11-2009, 02:55 PM	#5 (permalink)
PCx188 PCFIVEZ Join Date: Jan 2006 Location: New York City Posts: 801 Thanks: 24 Thanked 4 Times in 4 Posts iTrader Rating: (7/100% )	damn replacing that belt requires to tilt the motor! is there a better way to replace that belt without having to tilt the motor?

10-12-2009, 08:32 AM	#6 (permalink)
nocashrider Om Nom Nom Nom Join Date: Feb 2008 Location: Puyallup Posts: 1,056 Thanks: 8 Thanked 29 Times in 28 Posts My Google Map iTrader Rating: (6/100% )	you dont need to tilt the motor to replace the belt all you have to do is take the altenator belt off and then your able to get to the ac belt after loosen up the ac belt tightener

10-12-2009, 04:38 PM	#7 (permalink)
Ben Same In The End Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 4,274 Thanks: 20 Thanked 309 Times in 284 Posts My Google Map iTrader Rating: (16/100% )	If it is squealing only when you turn it on, it is either the belt as mentioned or the compressor clutch. If the belt is fine and tight, the clutch would be the problem.

10-14-2009, 07:16 AM	#10 (permalink)
nocashrider Om Nom Nom Nom Join Date: Feb 2008 Location: Puyallup Posts: 1,056 Thanks: 8 Thanked 29 Times in 28 Posts My Google Map iTrader Rating: (6/100% )	both you will have to be under the car to slip the belt on the crank shaft pully and over the car to slip it on the ac compressor and tighten it up