Author Topic: Torque settings on rear suspension  (Read 3343 times)

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Offline JohnFol

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Torque settings on rear suspension
« on: October 05, 2023, 11:43:00 AM »
Morning all, just refitting rear cross member to chassis and Haynes give 24.5Nm as the torque setting. This feels way too low. (79 spider)
Any advice?

« Last Edit: October 05, 2023, 02:37:53 PM by JohnFol »

Offline WestonE

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Re: Torque settings on rear suspension
« Reply #1 on: October 05, 2023, 04:52:33 PM »
Go with the Transverse Link settings they are the same size fasteners and even the same thread pitch. Use new P type (Deep) zinc plate Nyloc nuts and thick washers to spread the load.

Eric 

Offline JohnFol

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Re: Torque settings on rear suspension
« Reply #2 on: October 05, 2023, 06:30:43 PM »
I happened to buy deep nyloc and new bolts for outer ends of transverse arms so I have a few spare.

Although bush issue now resolved, cross member still shows some flex when grabbing wheel (whilst off the ground) and rocking it at 3 & 9 o'clock position.
Can't be sure if this is 1 more issue to solve or typical of the car

Offline Nigel

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Re: Torque settings on rear suspension
« Reply #3 on: October 05, 2023, 06:50:38 PM »
Hi John,
Remember to have the wheels 'on the ground' when torquing up.

Nigel
1984 2.0 Carb HPE [ex Aus] Grigio Finanza.
2007 Mazda 6 2.3 [current daily, highly recommended]
The past:
1980 2.0 HPE White in South Africa [hope it survives!]
1976 1.6 Coupe Lancia Blu [PFG 76R] [probably deceased]
oh,and an Uno Turbo 1997 also in SA [stolen,never recovered]

Offline HFStuart

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Re: Torque settings on rear suspension
« Reply #4 on: October 05, 2023, 07:34:59 PM »
I just had a look in the technical databook and it too says 24.5Nm so that's where Haynes got it from. That has to be a typo - especially as it says to use torque wrench 88091135 which has a range of 29 to 137 Nm

Offline JohnFol

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Re: Torque settings on rear suspension
« Reply #5 on: October 05, 2023, 07:36:35 PM »
Thanks Stuar

Nigel, Interesting....
Working alone and don't have access to a pit or lift so working under the car whilst on axle stands and clearance is ok. Couldn't imagine getting access behind the road wheel or inboard bushes without it being raised.

 I'm using the infallible Haynes guidance and the suggestion is to effectively load the suspension by jacking under the roll bar, effectively lifting wheel off the floor.

I'm open to a better way...

Offline Nigel

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Re: Torque settings on rear suspension
« Reply #6 on: October 05, 2023, 10:34:31 PM »
Yes John, that will be sufficient.

This pretty much applies to any metal/rubber bush that will sit 'clamped',
i.e. minimal rubber stress during normal operation.

N.
1984 2.0 Carb HPE [ex Aus] Grigio Finanza.
2007 Mazda 6 2.3 [current daily, highly recommended]
The past:
1980 2.0 HPE White in South Africa [hope it survives!]
1976 1.6 Coupe Lancia Blu [PFG 76R] [probably deceased]
oh,and an Uno Turbo 1997 also in SA [stolen,never recovered]