Squeel with aircon on, when its hot....

bikerdude666 · 27th May 2016, 15:48

A problem I've noticed this year, has only happened a few times, but when I start the car and turn the air con on, theres a loud squeak/squeal. It reminds me of the noise my dads old sierra used to make when it was wet, the noise changes as you rev the car, and it has only happened when the car has been parked in the sun for a few hours when its been 26+ degrees outside. Is this likely to be belt related? Or compressor or something?

SD1too · 27th May 2016, 22:37

As you have a diesel Derrick, it is likely to be the crankshaft pulley beginning to fail.

Simon

bikerdude666 · 28th May 2016, 11:55

Thanks, I had a feeling I'd read somewhere that a squeal could indicate that. Is there a check I can do? Got a feeling I've read something about spraying it with water?

Hope it's not that though as from what I can see its pretty expensive!

bl52krz · 29th May 2016, 22:26

Spray some water onto the crank while it is running. If it stops squealing, you have found the problem.. But I suggest you have a look at the belt that drives the a-con and its adjuster pulley first.

bikerdude666 · 30th May 2016, 18:43

Thanks, I'm hoping the weather is ok this weekend so I can get out and do a few things, will have look then. The belt is only about 2 years old, fitted as the original had started to crack.

27th May 2016, 15:48	#1
bikerdude666 Posted a thing or two Jaguar Xe diseasal Join Date: Nov 2011 Location: Little Stanion, Corby Posts: 1,922 Thanks: 363 Thanked 390 Times in 241 Posts	Squeel with aircon on, when its hot.... A problem I've noticed this year, has only happened a few times, but when I start the car and turn the air con on, theres a loud squeak/squeal. It reminds me of the noise my dads old sierra used to make when it was wet, the noise changes as you rev the car, and it has only happened when the car has been parked in the sun for a few hours when its been 26+ degrees outside. Is this likely to be belt related? Or compressor or something?

27th May 2016, 22:37	#2
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	As you have a diesel Derrick, it is likely to be the crankshaft pulley beginning to fail. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

29th May 2016, 22:26	#4
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,387 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Spray some water onto the crank while it is running. If it stops squealing, you have found the problem.. But I suggest you have a look at the belt that drives the a-con and its adjuster pulley first. __________________ Great Barr, Birmingham.

28th May 2016, 11:55	#3
bikerdude666 Posted a thing or two Jaguar Xe diseasal Join Date: Nov 2011 Location: Little Stanion, Corby Posts: 1,922 Thanks: 363 Thanked 390 Times in 241 Posts	Thanks, I had a feeling I'd read somewhere that a squeal could indicate that. Is there a check I can do? Got a feeling I've read something about spraying it with water? Hope it's not that though as from what I can see its pretty expensive!

30th May 2016, 18:43	#5
bikerdude666 Posted a thing or two Jaguar Xe diseasal Join Date: Nov 2011 Location: Little Stanion, Corby Posts: 1,922 Thanks: 363 Thanked 390 Times in 241 Posts	Thanks, I'm hoping the weather is ok this weekend so I can get out and do a few things, will have look then. The belt is only about 2 years old, fitted as the original had started to crack.