Thread: Noisy D1 Air conditioner belt

Hi James.
I have spare pulleys here if you want to try replacing them to eliminate the noise.
I am in crestmead 4132.
Pm if interested.
Cheers,
Tony

That particular belt is pretty cheap.
Even considering it's only 2 yo, may be a good idea to change it with a good quality one.

I had a screeching belt noise for a while on my 300 Tdi. brand new belt, and belt screeching. I refused to believe a brand new belt would screech the way this one did, so thinking it was bearings and all that jazz, I wasted a bit of $s on new pulley bearings, and even a new waterpump pulley.
All came to naught. No difference. close to new tensioner was then purchased, again no result.
Bought another new belt .. screech gone!

Strangely tho, the next issue that cropped up was that a week or so later, engine started to develop a knock at idle, but not with even a small rise in revs(eg. from 650-700 @ idle, to say 800-900RPM) ..
traced a lot of stuff, but in the end it tuned out to be a dud brand new tensioner knocking. Bearmach brand too(which are supposedly not a bad brand to look out for). Anyhow, new belt on .. no screching, old new belt straight into the bin!!
Old tensioner back on .. no knocking, no screeching .. almost blissful(but as it's a Tdi, it's only 'Tdi bliss').

I vaguely remember that my new AC belt only cost about $10 or so ... so before you spend too much on stuff that may not help try the cheap options too.

Also, spray some water onto it whilst the engine is running too. Best to remove the fan first, otherwise you cop a gob full of spray too! It may not stop the noise, but it should at least change it.
One thing I stupidly did too when tracign my main belt noise was try some of that horrid belt grip spray! .. AHHH! It sprayed muck all over the engine bay in a neat line parallel with the running of the belt.
It definitely stopped the screeching belt, but only for a short while, then it started again.

Do you have any oil leaks, new or old?
Reason why is that if any oil is penetrating onto and into the belts rubber, it could cause it to screech/whistle/chirp.

I had a similar experience with my 300Tdi. I would swap the belt out as suggested.

I had a strange squeak with my main accessory belt.
After fiddling about and even replacing the tensioner it turns out it was just the belt... The belt wasn't stretched and looked fine but just started squealing.