Refitting N47 crankshaft pulley/damper

[MontyDoodle]

On refitting the crankshaft pulley it says torque up the 4 Torx bolts to 40Nm and 120deg. Can a larger torque value be used and if so does anybody know what it would be

[Greydog]

Hi Oliver

There are many bolts that require Torq plus a Degree tightening sequence so best to stick to the sequence or you could over stretch the bolts and end up with them failing

I have a 1/2" drive degree tool but you can cut a circle of cardboard and mark 0, 90, 180, 270 off in pen then mark 3 equal sections in each segment. Torque to 40Nm then put your card in place mark the 0 point on the car with tippex. Now you can turn the bolt 90 plus one segment (30d) for your 120d,  always tighten in a diagonal pattern

Dave

[MontyDoodle]

Thanks Greydog, cardboard angle is a good idea. Any tips on stopping the pulley moving without buying an expensive tool that I will only use once

[Greydog]

Morning Oliver

When I rebuilt my 4.6is there was enough room to get a Stilson pipe wrench on the boss at the back of the pulley. That worked for me 

As you will be fitting new belts another tip is wrap the old belt around the pulley and clamp it tight with a pair of Mole grips the loose end of the belt clamp to the front subframe that should give enough of an anchor to torq things up don't reuse the old bolts as they are already stretched.

Good Luck 

Dave

 

 

[MontyDoodle]

Thanks again Dave, great tips