Belt makes a noise when revs are low. - Microbus Volkswagen Cars & Trucks

get the service and repair manual from the given link and fix the problem on your own toolsnyou.com

Sounds more like a bearing in the pump going bad. But change the belt first since it needs it anyway. Then you'll know for sure.

The first thing I will chk ,I will see any belt wearing sign,it that normal?any oil on the belt?is it only morning is making noise?second ,i saw some belt from the factory built is not as good as OEM.it will make noise .hoped that's help :)

If the belt and fluid levels are correct there is a good chance it may be a bigger problem. The power steering pump may be the fault. At lower speeds a worn pump isn't turning fast enough to push enough fluid. When you REV the engine your speeding up the pump pushing more fluid. Get the pump checked. If that's ok your possibly looking at a problem with the rack itself. ($$$ Ouch!).

It's the belt tensioner, don't listen to muppets

spraying WD40 on drive belts is not a good option as it can cause slippage it is better to use silicon spray or ordinary soap,rub the soap on the belt when the engine is stopped,as for the squeak it could well be the tensioner replace it first it may be the cheapest to start with.....hope this helps....cheers

Do you know which belt is making this noise? Usually it's the power steering belt, and sometimes it's the alternator belt. The power steering belt will make noise turning the steering wheel when stationary, the alternator belt will slip as you quickly rev the engine by blipping the throttle. In either case tightening the belt to the specified tension will fix the problem.

If you think it's the timing belt, get it replaced or inspected.

Even though there are other things that might make a noise, the damage you might do by having the timing belt fail while the engine is running are not worth the risk.

Sounds like a bearing packing up. Could be a siezing alternator, which would put enough of a strain on the engine to make it cut out. Does the pitch of the noise increase with speed?

Have the diesel fuel pump replaced