Alternator Clutch Pulley

[mears1000]

When I spoke to them they didn't have my year passat listed only upto 2000. They weren't sure if it would fit but when I went through Motor World they checked the serial numbers. I'm not 100% it was gmf who supplied it though.

All I need now is the pin wrench.

[caldirun]

As a follow on to the ongoing issue of supplies my local VW dealer would sell me the tool needed to remove the pulley but would cost around £25.

GMF in Llanelli sold me a Sealy SX400 kit for £17 and the pulley was £45 through Motor World in Swansea but supplied by another local motor factors (GMF I think). It's the INA pulley number 535 0005 10.

Price through any of the VAG dealers was exaclty the same.

Anyone know the function of a clutch in a pulley? how free should the pulley be in the reverse direction? can the pulley be stripped or lubricated if tight?

[mears1000]

Have a read of this. Anyone used their alternators?

http://www.qxcomponents.co.uk/tech.pdf

[Pauloz]

Anyone know the function of a clutch in a pulley? how free should the pulley be in the reverse direction? can the pulley be stripped or lubricated if tight?

Its there to calm belt flap which has become more prevalent in modern engines, especially diesels.
The movement should be smooth, its not a sprag clutch like on a push bike, just ball bearings that stop if rotated in one direction. The movement is not loose though, it should never spin.
Typically when they go, its because the insides are worn, and the ball bearings don't lock any longer, so rotates in both directions.
Its not a servicable item.
Hope that helps!

[caldirun]

Have a read of this. Anyone used their alternators?

http://www.qxcomponents.co.uk/tech.pdf

If a siezed pulley causes destruction of the tensioner a solid pulley will do just the same, Cowboys from the sound of it!

[Pauloz]

If a siezed pulley causes destruction of the tensioner a solid pulley will do just the same, Cowboys from the sound of it!

Yeah, I agree. Didnt read the link before.
The clutch pulley (OAP) is there for a reason. VAG wouldnt pay to fit it if they didnt need to!!
They didnt 'decide to replace it'... they went for the cheap option and did away with it...... IMHO.
The OAP is working all the time, not just slowing down quickly. Since when does road speed have a direct correlation with engine speed?? Theres a thing called 'gears' too!

[Crasher]

Drop the belt off and carefully hold the internals of the alternator with a screwdriver and the pulley should be solid in the direction of drive and free in the opposite direction with virtually no drag.