Td4 crank pulley/damper

Hi
I'm new to this so here goes:
I had a severe noise on my TD4 and it turned out to be the rubber part within the crank pully completly fell appart (didn't help that my wife noticed a noise and still decided to drive home with it !!) Anyway ordered a new aftermarket pully and had it fitted. It lasted 500km before starting to split the rubber again (noise returned) I hope it is just a faulty one. The main question I would like to ask is if there should be a woodruff key in this pulley. Mines doesnt seem to have one and Lanndrover parts tell me it just looks as if the timing chain pulley is the only one near the crank pully. - I am just trying to rule out any reason why the new pully failed so quickly - I have a new one on order - but am a bit worried that i am fitting it incorrectly. Any replies would be appriciated.
Thanks

Here's a link to when mine went a couple of years ago

http://www.landyzone.co.uk/lz/f9/td4-crank-pully-clatter-66563.html

It has been ok since fixed. Needs a lot of torque, and often the noise is caused by the splashguard rubbing

:clap2:300tdi. repeated replacement viscous couplings, alternaters, water pumps, steering pumps, tensioners, belts. you name it, it went!
TWO GRAND PLUS later..... scrapped, bought a nice little peugeot.
f*^k land rovers. NOT WORTH A LIGHT.

TwelvestringTrev said:

:clap2:300tdi. repeated replacement viscous couplings, alternaters, water pumps, steering pumps, tensioners, belts. you name it, it went!
TWO GRAND PLUS later..... scrapped, bought a nice little peugeot.
f*^k land rovers. NOT WORTH A LIGHT.

Click to expand...

Forgot to mention fitting 12 woodruff keys because of a worn crankshaft that caused everything!

Sorry to hear of yer loss.

my crank pulley experience....
http://www.landyzone.co.uk/lz/f9/crank-pulley-245876.html

oh,no keyway on the pulley,its just retained by the silly tight bolt.

LR said if it did not have a woodruff key then do not put a new one in and if it did have one then put a new one in but they did discontinue the woodruff key and it relied on the pressure of the bolt and the following must be done, stage one 100nmor 74lbs/ft
stage 2 angle tighten a further 60 degrees stage 3 angle tighten a further 60 degrees and stage 4 angle tighten a further 30 degrees. If you fail to do it this way could result in the pulley to fail. hope this helps, I did make a tool for holding the pulley wheel I will see if I can find it out and make some more.