What is number of alternator belt of Volkswagen toureng

See diagram
1) Power steering pump
2) Alternator
3) Serpentine belt idler
4) Serpentine belt
5) Crankshaft
6) A/C belt
7) A/C compressor
8) A/C belt tensioner
9) Serpentine belt tensioner
10) Water pump

V6?V8?V10? WHAT ENGINE?PETROL OR DIESEL?

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CS = Crankshaft
Gen = Alternator
G = Guide pulley
T = Tensioner pulley
AC = Air Conditioning
PAS = Power Assisted Steering

as the alternator IS the adjuster for the tension of the belt,it is a simple task of undoing the alternator bolts/nuts and pushing it inwards to fit belt,then pull it outward to tension belt to correct tension...

My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.

I do not know if you still need this information, but I am going ahead and answering it anyway. You may want to Print the Diagrams for future use.

CLICK on the following LINK. It has the Belt Diagrams you will need.
If you would: Before Clicking: Let me know if this helped you, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!
Again my apologies...
http://www.2carpros.com/car_repair_information/year/2001/make/volkswagen/model/golf/2001_volkswagen_golf_drive_belt_routing_diagram.htm

make sure that the alternator belt has not come off or broke,otherwise your alternator is not charging and needs to be checked by an auto electrician

dissconnect battery,remove wiring from back of alt,loosen drive belt,undo alternator bolts to remove and just do reverse order to fit,adjust alt belt carefully not too tight not too loose,eg;about a few mm of deflection in the belt

is the right belt fitted?its seems from what you are saying this belt is to small? check this out and check chassis number against new belt ref number;; if the wrong belt is fitted as you say then indeed it will pull the bearings in the alternator and run them out;as for the belt run this is a straight forward.let me know the out come.adrian

Is there a diagram on under the hood or on top of the plate over the radiator ?

loosen the alternator and push the alternator to-wards the engine,put your new belt on ,fitting around the 3 pulleys once fitted look and see that the belt is in line.If your happy the belt is lined put a small bar between the engine and alternator and force the alternator out towards the front this should tension your belt tighten bolts on alternator.;at the longest point between two pullys in the middle of the belt move belt up and down with fingers if tension is right it should not move more than about 150ml,hope this helps you.adrian