How to proove if lower crank pulley needs replacing CDTi's

Jules · 5th December 2008, 16:47

Boo chaps!
Yes we're after a lower pulley too for Mrs Jules ZT.
At 62k miles it has not failed yet but making a scrunching noise first few minutes when cold.

To prove it's the pulley simply aim water spray at the centre of the pulley.
The rubber cushioning gets some temporary lubrication from the water which shuts the noise up until it dries out again

Hoping to get a pulley before it collapses altogether and does some damage

Not cheap at around £200.36, and the motor factors don't seem to stock a pattern part yet.
OEM part number is: LHG100750 Torsional vibration damper-engine crankshaft

Take a look at the Lower pulley (torsional damper)
Peel back wheel arch liner.

You might see shiny/rusty rub marks on it.
There should be 0.5- 1mm clearance gap between the 2 moving surfaces.
We've changed many of these now and it amazing how it transforms a rough engine once again into a smooth one.

But sometimes there's just nothing visibly wrong with the pulley, but changing it out cures many noises & vibrations.

ie no more blurred rear view mirror images!!

Insufficient clearance will result in rubbing marks like this

Regards
Jules __________________

75 ZT General Servicing also specific tasks:
Cooling Fan motors complete ~ Cooling fan resistor upgrades ~ PCV Valve/Filter ~ Coil Springs F or R ~ Strut bearings ~ Sunroof repairs ~ Fuel Clip Mod ~ Intercooler Viton O rings

My eBayhttp://myworld.ebay.co.uk/julianviolin

NORTH WALES 75 ZT Specialist

Newbies do now!!
1. Plenum drains..all 3 or 4 year dependent
2. Cooling fan..All speeds functioning
3. Bonnet cable divider block

5th December 2008, 16:47	#1
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	How to proove if lower crank pulley needs replacing CDTi's Boo chaps! Yes we're after a lower pulley too for Mrs Jules ZT. At 62k miles it has not failed yet but making a scrunching noise first few minutes when cold. To prove it's the pulley simply aim water spray at the centre of the pulley. The rubber cushioning gets some temporary lubrication from the water which shuts the noise up until it dries out again Hoping to get a pulley before it collapses altogether and does some damage Not cheap at around £200.36, and the motor factors don't seem to stock a pattern part yet. OEM part number is: LHG100750 Torsional vibration damper-engine crankshaft Take a look at the Lower pulley (torsional damper) Peel back wheel arch liner. You might see shiny/rusty rub marks on it. There should be 0.5- 1mm clearance gap between the 2 moving surfaces. We've changed many of these now and it amazing how it transforms a rough engine once again into a smooth one. But sometimes there's just nothing visibly wrong with the pulley, but changing it out cures many noises & vibrations. ie no more blurred rear view mirror images!! Insufficient clearance will result in rubbing marks like this Regards Jules __________________ 75 ZT General Servicing also specific tasks: Cooling Fan motors complete ~ Cooling fan resistor upgrades ~ PCV Valve/Filter ~ Coil Springs F or R ~ Strut bearings ~ Sunroof repairs ~ Fuel Clip Mod ~ Intercooler Viton O rings My eBayhttp://myworld.ebay.co.uk/julianviolin NORTH WALES 75 ZT Specialist Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block Last edited by Dragrad; 22nd February 2011 at 18:58.. Reason: Inserted current price, wow.