Thread: Disco Tdi 96 serpentine belt noise again.

Sorry mcrover I disagree I am fitter and turner by trade and v-belts are the most widely used form of power transmission.

I work at a brick factory and all we use are v-belt we tried cogged tooth belt poly chain and serpentine belts only to go back to the trusty old v-belt as they give the longest life out of all the belts availlable and when a v-belt is squeeling it usually indicates missalignment and a worn out pulley and if it is making noise another few turns on the torque arm and it quiet again.

I understand that the 7pk belt is a multigroove belt but as I know suspect that as the pulleys wear on our cars the belt does not make full contact with the v sections on the pulleys causing me my head ache just going from personal work experience.

thanks Ralph.

Originally Posted by Rad97

looks like only thing left is to try another belt.

I really do wish they had v-belts!!!

If the belt went quite when you sprayed so Easy Tyre cleaner but squealed again next day try spraying a couple more times as at first time mine lasted about a day then sprayed again then went longer ever since has gone for app 4 months now with no noise. Usually after 4wd in Mud or wet conditions it starts squealing clean car and belt then spraybelt.
Sorry to hear of your frustration but that is how i felt as it sounded horible in undercover car parks at shopping centres.

Had that problem with mine, real bad, used a little straight edge against idler tensioner pulley and found it to be out of line. Made up a shim to fit behind tensioner mount, moved it around to get things aligned. Noise gone, no new belt, spray etc. that was 25000k ago. Misalignment caused by wear in bush, next time it does it Ill fit new tensioner complete.
Ray

I have had similar problems with mine. If you have a close look at the belt you will notice that the ridges on one edge may be closer to the edge of the actual belt surface. In other words, the belt is cut from a wide section into narrower belts. This is rarely done perfectly evenly. You may therefore find that the belt is noisier one way round than the other, and that the edge of the belt is intermittantly contacting the lip of one of the pulleys. You can try rubbing the uneven sections with some sand paper or similar....may help!

Hi to all in Aus,
The noisy belt problem is very common in England (maybe the damp weather)
Our tried and trusted solution is to loosen the tensioner from the engine slightly and place a small coin in the 9 '0' clock position and re tighten the tensioner and jobs a good un. no more nasty noises.
Regards
Geoff

Cresta can you elaborate a little more as have never heard of this.

thanks Ralph.

Try these threads from Difflock

Difflock :: View topic - Another 300TDi belt squeal thread

Difflock :: View topic - 300Tdi Squeak

Originally Posted by Rad97

Cresta can you elaborate a little more as have never heard of this.

thanks Ralph.

Hi ralph,
It would seem that the tensioner pulley somehow gets out of line with the serpentine belt. So by placing a small coin ( 1 pence in England ) in the 9 '0' clock position provides just enough correction to pull it all back in line.
With regard to any worries about excess strain on the tensioner bolt, don't worry, i have never heard of a failure relating to the above fix. providing you torque it to the correct value.
As an aside i would guess maybe 75% of British Discovery owners have used this fix. My own 300tdi has covered a grand total of around 400,000k's and purrs like a kitten and it never squeals !
Hope this is of help to you.
Thanks
Geoff