noisy air con

[bujna]

Hey guys,

The hot weather must be getting to the golf. Both last when driving home and today when driving around at lunch, I had the climate control on, and all was good until after about 20 - 30 minutes of driving there was quite a loud whirring noise. Basically at idle you don't really hear it but, it happens as you rev the car, or you are downshifting through the gears. When i turn the air con off the car sounds fine.

Could the air con unit need some basic maintenance or is the compressor on its last legs?

Dan.

[kaneda]

Could be a bearing in the compressor or maybe the compressor clutch.....
Have a look at the comp with the car running ,see if the clutch is working how it should and if it is and the sound is comming from the comp then i say at a guess its a bearing. I take it that the system is still cold tho ?

[bujna]

Yeah, it's still blowing cold.

When i get home this arvo, i'll have a look at how the compressor is going.

Thanks,
Dan

[qsilverza]

Hope you get it solved Dan, Roof racks worked a charm nice to meet you even if it was in a carpark for five minutes !

Got my exhaust back hope to fit it tomorrow !!!

[Jmac]

Mate the bearing in the serpentine belt pulley might be worn. This gets loaded up when the Air is on. Have a listen in that area
CHeers

[bujna]

Mate the bearing in the serpentine belt pulley might be worn. This gets loaded up when the Air is on. Have a listen in that area
CHeers

Thanks for the replies. I think this might be on the the money. I had a listen last night when i got home and there was definitely a mild squeak/whistle coming from that area at idle. Should this be easily repaired? i.e. I'm hoping they won't want to replace the whole compressor... either way, i'm going to call about it this morning and book the car in....

Hope you get it solved Dan, Roof racks worked a charm nice to meet you even if it was in a carpark for five minutes !

Got my exhaust back hope to fit it tomorrow !!!

That's awesome mate. I can't wait for my 42DD exhaust to turn up as well.
It was good to meet you too.

Dan.

[Mr Messy]

Re: Air con.
Mine seems to get a second wind so to speak about 2-5 mins into a drive. It blows cold okay then later WOOOOSH it really gets going and blows harder into the cabin. Not sure why, but could yours be doing the same???

[Jmac]

Just to add mate the belt tensioner is a complete item. Loads around though, i would be tempted to pm Golf Loon he will have one for sure. The pulleys come off seperate but can only be bought complete, go figure. He may still have a good pullley
Cheers

[McDub]

make sure you don't have one of your vents at like 95% closed position.
that was the most succesful fix i've ever made when i heard my aircon whirring, and found out it was just because the vent was causing the whistle!

[bujna]

Re: Air con.
Mine seems to get a second wind so to speak about 2-5 mins into a drive. It blows cold okay then later WOOOOSH it really gets going and blows harder into the cabin. Not sure why, but could yours be doing the same???

I'm not sure about that mate. Mine fluctuates a bit but only when it's set to auto, as you'd expect... Even before this noise developed, it has felt like the air con has been stealing more power from the engine than usual. A mechanic is checking the pulley bearings for me on wednesday and we'll see how we go.

make sure you don't have one of your vents at like 95% closed position.
that was the most succesful fix i've ever made when i heard my aircon whirring, and found out it was just because the vent was causing the whistle!

hehe....nah, mine is definitely making noise from outside the car.... It's pretty noticable when it happens.

[Jmac]

If you feel it is dragging it could well be the compressor mate

[h100vw]

Got one if it's needed.

Gavin

[bujna]

Thanks heaps Gavin.

I will see how things go at the mechanic tomorrow and i'll let you know.

Dan.

[GTIputih]

any progress on this? I have similar problem on my mk4..

Thx

[bujna]

Well i took it to a mechanic who was unable to repeat the issue in his workshop. This makes sense since it only does it after the car has been driven for 20 minutes or so, and the car needs to be revved for the noise to occur. It doesn't make noise at idle.

He suggested taking the car straight to him if i'm in the area and the car is making the noise. I will do that, but i haven't had much time to repeat the issue lately.

The only problem now is that my new somewhat louder exhaust is hiding the noise from my ears for the most part, although i'm sure it's still happening on the very hot days.

So in short, no fix yet...