Crank Shaft Pulley Loose

[si macc]

Hi everyone,

I had an issue last weekend with the van (1.6td jx) overheating at speeds over about 30mph, it would be fine driving around town but as soon as I put my foot down on an A road or motorway the temp would start to creep up. I managed to get it home thankfully and have just been investigating the problem. Initially I thought (and been told) it was a good idea to start with the thermostat so I got preped to drain the coolant and get the housing open to test it. I found that the rear pulley on the crank shaft (the one I'm, using on the 1 belt setup) was so loose I could wobble it and twist it right around.

I'm guessing this isn't right but wanted to check that this is definitely not normal. I also wanted to check that twisting the shaft while trying to undo the allen bolts on the pulley wasn't doing any damage? They're currently going nowhere so I've WD'd them and about to go off somewhere to get a gas torch to help remove it.

Thanks for any advice,

Si

E D I T: Just looked for a pulley to replace it and couldn't see anything on Brickwerks or GSF, does anyone know where to get one or if that is actually what I need?!

EDIT2: Have taken a video to help explain:
http://www.youtube.com/watch?v=GEqqV6Oz ... playnext=1

[Zomerzet]

I'm not experienced in your engine, but if the pulley is like that, anything that runs on that belt won't be working properly. IF it's what powers your water pump it'd definately cause your issues. If may work slightly at lower speeds as you say, but not keep up at higher revs. Turning that wheel shouldn't do any damage as its simply a drive wheel and not a timing mechanism.

[footstuck]

Hi
I can't remember if the aaz type pulley is also a damper (like the tdi), if so
Has the rubber damping medium broken down between the inner and the outer part of the pulley? This would allow the outer part to freely move.
If this is the case, a new pulley (torque vibration damper) should do it, you won't like the price though.
Is the central retaining bolt still in place and tight? I think it's a morse tappered fit, so if loose would allow free movement.
The last thing is that the crankshaft nose is prone to damage. This can render the crankshaft U/S if you are un luckey


Best of luck mate

[si macc]

Thanks both for the replies.

I was wondering how they were originally connected together as I noticed the rubber on one of the plates. I have removed the two plates and the outer one seems to be fine so will use that with a 2 belt setup for now without the inner plate. The inner one was completely free and had worn the plastic housing that covers the area where the cam belt is, thankfully hasnt damaged anything inside the housing though! All the other parts of the pulley are secure now so will run the engine and see where I get.

[footstuck]

Hi mate
Put up some photos so we can see the offending article,
Might help to identify what went bandy.