hopefully someone can help. Our 98 D1 tdi has a perpetually noisy belt on the aircon section. Ive replaced the belts - no joy. I replaced the tensioner arm bearing - still no joy. The squeal used to disappear once the engine warmed right up, but after trying some dry lube that seems to have made things worse - now it simply does not stop. Its driving my wife and Kids nuts, not to mention the looks as we drive through any town or street.
Cheers
Chris
Wizard
SubscriberWelcome mate, Must be the bloody tassie weather.
My airbelt made a bit of noise occassionly so doing the right thing I replaced both, now having a problem with the nain belt. ATM I got so sick of it I resorted to beltgrip. Will try and sort it out when I have more time and 2 new belts
cheers
blaze
Wizard
Earlier in my Disco fixing career, I put an a/c belt on with the tensioner pulley running on the grooved side of the belt. It was OK for a while then started squawking its head off. New belt with the flat side on the tensioner - all was well.
Yours in the right spot? Locate OK on the crank pulley? Does it run straight? Is the compressor cocked at any sort of angle? The belt will only squawk continually if it's not running truely, or the new bearing is a dud.
Pete
Dizzie, 08 D3 TDV6 SE
Dum question but whats beltgrip?
Your right about the weather though - I dont think the vehicles used to being this dry for so long.
Cheers
Chris
Wizard
Subscribercrc product in a spray can, sticky ****Originally Posted by Ringky
cheers
blaze
G' Day, I do not have your problem but i often spray my D1's belts with inox and have found it do not cause the belts to crack and it seems to keep the belts silent. I think most of the noise is because the bearings in the roller tensioner are warn and the roller is locking or jamming momenterly have fun. kiwi steve
just resently my aircon belt became abit noisey and it turned out to be the clutch on the front of the compressor which cost only $20 to replace no more noise cheers sjb
Master
Ringky, i suggest to follow some information that's given in the Workshop manual:
-To fix the belt tensioner when the pulley tension is 35N/m (if not, when compressor coupling is working the noise is worse)
-In the A/C Compressor troubleshooting section are oil in clutch's surface and pulley bearing listed as guilty possibilities.
Finally, both aircon and general belts can be noisy if there is a lot of sand, dust, too, trapped in the V-channels. You can clean them, don´t forgetting pulleys, and this can be enough.
Some mates from my local club are used to use a bait candle to graze the belt from the inner side in order to silent it.
Regards
Wizard
Sometimes noise from the AC belt can come from the smooth side of the belt as it contacts the smooth surface of the tensioner pulley.
A different brand of belt may fix the problem.
You can also try tensioning the belt a couple of Nm more of less than factory.
But keep the tension very close to factory so that other components don't wear quicker, or the belt slips.
Try roughing up the surface of the tensioner pulley with a bit of sand paper or maybe even a file.
With the engine off, randomly rough up the tensioner pulley all the way round the surface where it contacts the smooth side of the belt.
Or you could replace the whole tensioner pulley with a new one.
I have found belt grip and alike to sometimes work temporarily, but the noise always comes back, sometimes even worse.
Talc is also known to be useful, so a sprinkle may silence it for a while.
Good luck!
PS: Just thought of something else: run a little water onto the belt, if it quietens down, the noise is probably due to the belt contacting the pulleys and not a bearing. Although this does not always hold true.
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