MB Cambelt CHange Intervals

[BackintheFold]

Why is that? There are 4 allen headed(?) bolts fixing the pulley to the gear, and the gear uses the big bolt to attach to the crank.
If you remove the pulley, the gear stays attached to the crank with the big bolt.
see
https://audi.7zap.com/en/rdw/audi+qu...46/1/105-5000/

Granted it's gonna be tight, but you can then swap a new belt on without the front bumper coming off or having to re-torque the crank bolt.
EDIT
And those four bolts may snap of course, but theoretically this is possible.

[20vcqdriver]

Originally Posted by BackintheFold

Why is that? There are 4 allen headed(?) bolts fixing the pulley to the gear, and the gear uses the big bolt to attach to the crank.
If you remove the pulley, the gear stays attached to the crank with the big bolt.
see
https://audi.7zap.com/en/rdw/audi+qu...46/1/105-5000/

Granted it's gonna be tight, but you can then swap a new belt on without the front bumper coming off or having to re-torque the crank bolt.
EDIT
And those four bolts may snap of course, but theoretically this is possible.

Afraid not, not on the I5 as if you look at the drawing the Big bolt goes through both the vibration damper AND the pulley. So the 4 small bolts are just used to locate the pulley to the damper and the big bolt used to attached the damper and pulley to the crank. Its a pain but it has to come off I'm afraid

[BackintheFold]

Originally Posted by 20vcqdriver

Afraid not, not on the I5 as if you look at the drawing the Big bolt goes through both the vibration damper AND the pulley. So the 4 small bolts are just used to locate the pulley to the damper and the big bolt used to attached the damper and pulley to the crank. Its a pain but it has to come off I'm afraid

No, it really can be taken apart-I mean, otherwise the vibration damper/pulley would be bolted metal to metal to the crankshaft, and wouldn't dampen any vibration.

Anyone with easy access to one want to confirm? I can't get to car today.

I noticed this when i was changing mine. It would be a whole lot easier to do a change. I'm not convinced those 4 bolts would be undone by a 12 year old, and may well snap or round off, but if you have to take the front off as an alternative/anyway, you are not losing much if you have to drill them out on the bench-as you will then have to remove the big bolt anyway!

[BackintheFold]

I'm getting less certain now-so happy to be corrected. Will take a better look at mine later
EIDT
and now i'm more convinced.
Look at this pulley:
https://www.ebay.co.uk/itm/VW-Audi-s...ce82%7Ciid%3A1

I know its not an Ur, but when the big bolt goes through this pulley, there is zero metal for it to clamp the pulley to the crank gear-it is held on by the four bolts.

[Ringmaster]

Originally Posted by John.

It wouldn't hurt to get a quote for the job?! Would be interesting to hear what they come back with ?

From approx. £750 all in for just the belt. Add another £200 for water pump.

This sort of job is currently on offer....!

[mikes2]

Originally Posted by BackintheFold

I'm getting less certain now-so happy to be corrected. Will take a better look at mine later
EIDT
and now i'm more convinced.
Look at this pulley:
https://www.ebay.co.uk/itm/VW-Audi-s...ce82%7Ciid%3A1

I know its not an Ur, but when the big bolt goes through this pulley, there is zero metal for it to clamp the pulley to the crank gear-it is held on by the four bolts.

Here's one I prepared earlier with the locking tool in place



You cannot remove the vibration damper with that bolt there.

From approx. £750 all in for just the belt. Add another £200 for water pump.

This sort of job is currently on offer....!

I'm in the wrong job. Considering you have to loosen the water pump to remove the belt on the KU, it adds about 15 minutes to the job max. They don't want the work at that money.

It's a pity you're so far away

[John.]

Originally Posted by Ringmaster

From approx. £750 all in for just the belt. Add another £200 for water pump.

This sort of job is currently on offer....!

Did you ask them what drugs they are on ?!

As Mike said, they don't actually want that job.

[BackintheFold]

The diameter of the hole in the middle
Of the pulley is much larger than the diameter of the big bolt’s shaft.
It must be designed that way on purpose. I’ve just had another look at mine and I would swear that The large bolt will fit through the hole on my pulley. Yes it’s a tight fit but the big bolt does not hold the pulley to the gear.
Betting a beer to anyone who has pictures of them apart and can prove the big bolt won’t fit through the hole.
So it’s a win win...

Edit-look at this Ebay listing and the images.

184523683288

You can see where the surface of the pulley has been damaged by the undoing of the small bolts. There is no damage-no scrapes at all-around the large centre bolt, so it must be possible to remove the pulley without removing that bolt.

[Ringmaster]

Originally Posted by mikes2

I'm in the wrong job. Considering you have to loosen the water pump to remove the belt on the KU, it adds about 15 minutes to the job max. They don't want the work at that money.

It's a pity you're so far away

Can't say it surprised me, someone has to pay for all those fancy facilities. I dread to think what the price is when not on offer!

Will just have to seek out a competent local mechanic. My usual chap is cheap and cheerful, but I wouldn't trust him with an important job like this....

[vagdream]

I seem to remember paying about that much (if not more) at Audi around 16 years ago for the cam belt and fuel pump belt on a C4 with AEL lump. Hate to think what the the offer price might be now!