Engine Noise when AC ON??

[haris2887]

hi all..
i have a weird noise coming out of the engine bay when i turn the AC on, the noise is fairly loud and only happens when i turn the ac on,
If i turn the fan on without AC there is NO noise...

so i am thinking it is related to the compressor/belts maybe ?
any ideas what i can check ?

 

[djltoronto]

hi all..
i have a weird noise coming out of the engine bay when i turn the AC on, the noise is fairly loud and only happens when i turn the ac on,
If i turn the fan on without AC there is NO noise...

so i am thinking it is related to the compressor/belts maybe ?
any ideas what i can check ?

Define "weird"


It's not a silent system. it makes some noise normally. (dunno)

 

[haris2887]

hi..
grinding noises really loud..
i could be the magnetic clutch thing...

definitely not the belt slipping noise..

 

[cackalacky]

Mine is similar and will do it even when I have AC off but the defrost on. The other day it sounded like a diesel under the hood when I was stopped at a light. Have only 10k on the odo so it's a little annoying...

 

[RENE063]

Mine is similar and will do it even when I have AC off but the defrost on. The other day it sounded like a diesel under the hood when I was stopped at a light. Have only 10k on the odo so it's a little annoying...

The reason you hear it when the defrost is on is because your a/c is being used to get rid of the humidity inside the car.

 

[flash75]

If the AC is working check the pulley and clutch assembly. Look for loose pulley bolt or possible clutch damage.

Clifton

 

[ReactiveRacing3]

The compressor is located all the way at the bottom of your engine on the passenger side. I agree.. you should turn it on, pop the hood and look down there with a flashlight. The pulley may be wobbling a little, or the belt can make a LOT of noise if it's in bad shape. Remember this is a one-time elastic drive belt, so if you just serviced something, replace it.

 

[sumixali]

mines been doing the same since i drove off the lot, The AC system is just a power robbing noisy ahole. but if it blows cold im happy!