(04 Bora) Do I need a single or double sided serpentine belt?

wet-paint

Hi folks,
So as the title suggests, I'm in some doubt as to which belt to get. I've a 04 Bora TDi, and the belt decided to up and disintegrate somewhere around Kinvara last night, so I've no belt to compare it to. The Haynes manual is no use, as it just gives me diagrams for both with and without aircon. All I can find out is that I need the one that turns the aircon compressor as well, but I don't know if I need single or double sided ones.

Micksgarage is no use, and indeed they are recommending two different length belts for use with aircon, which is... unseemly. Most are offering the 1195mm version, so I'm just presuming that's the one I need, but I'm not positive by a long shot.


Any advice you can offer would be greatly appreciated,
Cheers,
WP

dooroy

Is your Bora petrol or diesel ?
Some of the diesels had 2 belts - a long one for alternator , power steering, cooling fan etc and a shorter one for the air con only ; both driven from the crankshaft pulley.

wet-paint

It's a TDi, 100BHP.
So if it's got two belts on the crank, I presume that pulley would be twice as wide as the others, so as to accommodate two belts? I've not lifted it yet, but will be doing so on Monday and can check then.

Cheers for your help.

dooroy

It would appear that your car has only one drive belt - the longer one if your car has air con (as it has an extra pulley to go around) , the shorter one if it doesn't ; if there was a separate belt for the air con it would be listed .

irishfire

If you want to pm reg or vin. no. I'll look up the vw parts catalogue and see what's listed.

wet-paint

Having put it up on stands, I took a look at the pulleys, and this is what I'm guessing the belt diagram to be. Would this be accurate? See attached.

Cheers.

dooroy

Belt appears to have very little contact with AC pulley - and AC puts quite a load on when working so belt would be very likely to slip.
Is there no idler pulley , for example , to bring the belt more in contact with AC - maybe between the PS and AC and a bit to the left ?

wet-paint

Aye, I'd been wondering that myself too. Not that I can see, no. But maybe that's the problem, that the idler broke and fell off?

dooroy

http://forums.tdiclub.com/showthread.php?t=200104&highlight=BEW+serpentine+belt

Have a look at this, is it anything like yours - apparently AC is driven by the back (flat) of the belt.
Does the AC pulley have grooves in it or is it flat ?

irishfire

Computer says single wet-paint...

Along with this advisory: "caution: either 038 109 119 s or 038 109 119 p are supplied."

dooroy

That's the timing belt ; wet-paint said it was the alternator belt that broke.

wet-paint

dooroy wrote: »

http://forums.tdiclub.com/showthread.php?t=200104&highlight=BEW+serpentine+belt

Have a look at this, is it anything like yours - apparently AC is driven by the back (flat) of the belt.
Does the AC pulley have grooves in it or is it flat ?

The ac pulley is grooved, but unlike the link you supplied, the tensioner pulley is flat, so I went with a single sided belt, which the mechanic recommended. It's easy enough to go and get the correct one if I'm wrong, but I wanted to try and figure it out myself first.

Cheers for the image Irishfire, but yep, twas the aux belt that went.

George Dalton

1.9TDI with A/C = double ribbed belt
1.9TDI without A/C = normal ribbed belt