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how tight
Stuart_B - 18/6/08 at 06:45 PM

hi all, i throught i have done all my wisbones and shocks now, but know i am thinking how tight do you do the bolts??
do you make it crush tight or tight but lose enough so it moves freely?

thanks

stuart


CRAIGR - 18/6/08 at 07:00 PM

30lb/ft on my westfield for all the w/bone and shock bolts i think.

[Edited on 18/6/08 by CRAIGR]


l0c0st - 18/6/08 at 07:10 PM

Hi, I have read on here before that it needs to be on all four wheels before tightening them up fully. I can't remember why, but someone will be along soon to confirm it's correct.

Thought I should mention it, just in case

Dom


mookaloid - 18/6/08 at 07:16 PM

quote:
Originally posted by l0c0st
Hi, I have read on here before that it needs to be on all four wheels before tightening them up fully. I can't remember why, but someone will be along soon to confirm it's correct.

Thought I should mention it, just in case

Dom


I think that's if you are using the Truimph Herald rubber type bushes - the indy bushes are PU and are not fixed to the centre crush tube like the herald ones.

Cheers

Mark


RichardK - 18/6/08 at 08:24 PM

Yep if you're using the Truimph Herald type on which the crush tube is fixed then yes keep them slack, sort out the ride height etc and tighten them up, thats what I've done anyway.

Rich

P.S Mooky you still working too hard?


nick205 - 18/6/08 at 08:26 PM

If using the usual poly bushes and steel crush tube then the bolts can be done up with the car in air and wishbones at any angle. Do them up good and tight as you want to hold the crush tube nice and tight in the chasis bracket and ensure that it's the bush rotating on a fixed crush tube.

Make sure you grease the bush/tube interface whilst assembling otherwise they will suffer stction and squeak like a bugger forever more.

For the shock bolts, unless you're using shocks with rod end type fittings, you want to wait until the car is on it's wheels with the full weight acting on it and the ride height roughly set. then pinch the bolts up tight. This avoids over stressing the metal/rubber bond of the metalstic bushes of the shocks.

HTH

Nick


flak monkey - 19/6/08 at 06:47 AM

quote:
Originally posted by CRAIGR
30lb/ft on my westfield for all the w/bone and shock bolts i think.

[Edited on 18/6/08 by CRAIGR]


Thats the right torque for rubber bushes. Polybushes need to be done up to around double that to be sure of holding the crush tube tight in the brackets.

The recommended torque variues depending on the bolt, but will take it to ~75% of its yeild strength, this is the point at which it produces the optimum clamping force.

For an 8.8 grade M12 this is approx 100Nm

David