Aux Belt Tensioner

[chromedome]

I have just had a new aux belt and tensioner fitted. I have noticed that the tensioner is sitting in it's un tensioned positioned. I'm wondering if the belt has been fitted incorrectly effectively making it too long.

 

Does anyone know the correct belt routing for my TDI?

 

Thanks.

[insanitybeard]

I'd try to post a picture but not sure if it's working on the site! I'll try to describe-  From the crankshaft pulley it passes under the tensioner wheel, around the alternator pulley, round the reverse side (the rear facing side) of the A/C compressor pulley, around the power steering pump pulley and back to the crank pulley. 

Edited November 19, 2013 by insanitybeard

[SilverBeast]

Here

[gregers]

Here

naughty, :lol:

[SilverBeast]

:ph34r:  

Ah yes but the downloads are working there too!

[chromedome]

Thank you

[gregers]

:ph34r:  

Ah yes but the downloads are working there too!

i know, :rolleyes:

[chromedome]

Belt is fitted correctly but the tensioner arm is still touching the body of the tensioner so can't apply any extra pressure, as was the old one. Am I thinking wrong about this? I would have thought the tensioner arm would be held away from the body of the tensioner by the load applied to the belt.

 

The belt length is correct for my vehicle. is there a different length belt for vehicles with dual air con like mine?

 

The only other related thing I have had done is a new alternator pulley fitted.

[chromedome]

Please can someone supply a photo of their tensioner in situ. Thanks.

[chromedome]

seatkid you have mentioned about the tensioner hitting it's end stop in another post about a chattering tensioner. That is where mine is sitting even with new belt and tensioner fitted. This one is driving me crazy.

 

Am I right when I say the engine rotates clockwise when looking at the aux belt end on. If so it doesn't look right on the diagram I have. It would look logical if it rotated anti clockwise.

Edited November 22, 2013 by chromedome

[seatkid]

Correct belt for 2005 diesel with cc (single/dual) is 06A 260 849 C

 

21,18 X 1195MM

 

http://www.auto-parts.spb.ru/webcat/au/au.mycat?SelPg&t=Pg_ZAP0PmQCuD5kAfFXxOQ9OwCZtVheoij_ZAA5QGTA_D5t/3i2dDD493xg_L5lqLKXiJqrzP9JzOTnaMxWN9QNP8QBkujexXNu/aqERRftyk/R8GRcP30SyDDEgTFgAv4YMe7aj80iAz7myCsuiKxYK8ZhuzsMd54jMWFpdcZejpNCJYGf_KXCAXkaKPm3Qw4QgIqIn0UdqVYEA

Edited November 22, 2013 by seatkid

[insanitybeard]

Am I right when I say the engine rotates clockwise when looking at the aux belt end on. If so it doesn't look right on the diagram I have. It would look logical if it rotated anti clockwise.

 

The engine does rotate clockwise viewed from the crank pulley end, if you still haven't resolved this I can email you a picture of the tensioner area on my '54 plate 130PS TDI (would try to post a picture but I presume I won't be able to)- just send me a pm with your email address)

[chromedome]

I have received some photos from insanitybeard, thank you, and I definitely have a problem.

 

His tensioner sits roughly half way of it's travel while mine is up against it's back stop effectively not tensioning the belt.

 

I had the alternator pulley changed some time ago because the tensioner was chattering against the back stop and has never really been resolved correctly. The only work done prior to this was cam belt kit and water pump.

 

I'm wondering if our local parts shop have the wrong belts in the packaging. I checked the length of the belt that has just come off and it was just under 25mm longer than the specified 1195mm. Would a belt stretch this much in about a year?

 

There is a lot of head scratching going on with this at the moment. Any comments welcome.

[insanitybeard]

I would say there's no way a belt of the type used (multirib polyvee belt) would stretch 25mm without breaking, the cords in them won't give that much before they snap! Sounds like you have an incorrect belt to be honest, maybe worth getting one from a different source? The one I got from GSF was about 23 quid recently and was spot on.

[chromedome]

I'm pretty sure that is the problem. Most garages here seem to use Euro Parts. I will get one from GSF as well.

[chromedome]

Just measure the outside of the old belt and it is 1235mm. That's 40mm longer!!

[seatkid]

Just measure the outside of the old belt and it is 1235mm. That's 40mm longer!!

 

There are many different lengths of belt fitted, dependant on engine code, year, type of alternator, compressor if fitted, etc etc. An incorrect one was probably fitted - the part no is printed on the smooth side showing the length. I dont think they don't stretch much. Fitting the correct belt will fix the problem.

 

Note that this style/width of belt is fitted to many other cars and so there are many many lengths available virtually every other mm.

 

You can always fit the old belt back for the time being...

Edited November 29, 2013 by seatkid

[insanitybeard]

It's made a bit more tricky on the TDI's as they use the double sided polyvee belt, so it's not even like you can look at the smooth side of the belt to see if there are any lengths/ part numbers stamped on it!

[chromedome]

Can I ask what you used to hold back the tensioner to enable fitting of the belt.

[chrispb123456]

There's a lug on the top of the tensioner that you can fit an open ended spanner to pull the tensioner over till the two holes under the tensioner line up, you can then place a suitable size pin or drill bit to lock it in place while you deal with the belt.

[chromedome]

Great, thanks for that.

[chromedome]

GSF belt fitted, still the same problem. We have cut about 3-4mm off the lug of the tensioner and it no longer hits the back stop. It's position changes under different loads as it should. I bought the car when it was six months old and we are thinking it may have the wrong alternator fitted as a replacement when the car was nearly new. Of course the alternator pulley was changed to match the alternator.

 

Hopefully this fix will keep working ok until such time the alternator blows........................ There is plenty of clearance between all the pulleys so we can't foresee any problems.

 

Thank you for every ones input on this one.

[seatkid]

The only other related thing I have had done is a new alternator pulley fitted.

 

If you fitted a 6dpk1195 belt then you must have an incorrect alternator pulley and/or tensioner/pulley fitted. There are two alternator pulleys listed on GSF one is 61.5mm dia other is 55.5mm dia. Likewise there are two different tensioners listed. the correct one is shown here

Edited December 3, 2013 by seatkid

[chromedome]

61.5mm dia pulley fitted and the tensioner shown in the diagram looks right. Aghhhhhhhhhhhhhhhh

[chromedome]

Double checked the pulley and I think it is 55mm. I am positive that I ordered the bigger one but I can't find the receipt to prove it. I will let it carry on as it is as you can guarantee the alternator will fail sometime.