Jonny H

Active Member
2004 Td4. Hi all. I'm having a problem releasing the tension to change the aux belt. I can get a spanner on, no problem, but as I try to release the tension, it only goes so far before the nut on the pulley starts to turn instead of the tensioner moving.
I'm not sure how the nut is fixed to the pulley, is there some way to retighten it, which ever way I turn it, it just keeps spinning?
Any advice appreciated.
 
Common issue, I think it needs an open end spanner behind the tensioner. I've seen threads on it so keep searching.
 
Here's your answer


Looks like the 24mm bolt is a reverse thread so pulling it forward should only tighten it, however, remove small pulley underneath and fit spanner to back of tensioner. Some say 13mm, some 15mm.

Good luck
 
Here's your answer


Looks like the 24mm bolt is a reverse thread so pulling it forward should only tighten it, however, remove small pulley underneath and fit spanner to back of tensioner. Some say 13mm, some 15mm.

Good luck
I say 15mm a long aviation spanner is good for the job, in the photo the engine is out of the car.

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Thanks again for the information. It will depend what tools I can get my hands on, we're away on holiday with only a basic tool kit in the car!
I don't want to risk the 850km drive home with the alternator on it's way out, new one arriving tomorrow, fingers crossed.
 
Alternator is not difficult, but not a roadside job !!

If you have aircon then the compressor needs to be removed and tied out of the way.
 
Cheers Andy. Hopefully I'll be able to beg and borrow enough tools to get the job done before we set off home!
 

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