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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 01-23-2011, 05:12 PM
cambrian123456 cambrian123456 is offline
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Torque Spec required - rear shocks for touring

Doing my rear shocks next week for a 2000 528i touring. I'll follow this DIY guide: http://forums.bimmerforums.com/forum....php?t=1171210

Does anyone have torque specs for the shock-swing arm bolt, or the the three nuts on the upper guide support?

Also, what's the deal on letting the suspension settle before the final torque on the lower bolt? Once you torque the shock-swing arm bolt properly, why does it matter if you apply some shear force? Doesn't the bottom of the shock just sit in the right spot the first time you torque the bolt?
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  #2  
Old 01-23-2011, 07:07 PM
cn90 cn90 is offline
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http://www.beisansystems.com/procedu..._procedure.htm
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  #3  
Old 01-23-2011, 07:31 PM
cambrian123456 cambrian123456 is offline
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Thanks cn90. I like those Beisan write-ups. I'm hoping to follow them when I do my front struts. I was looking specifically for the specs for a touring rather than sedan, though, as the shocks are outside the coils on the touring and have different mounting hardware.
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  #4  
Old 01-24-2011, 12:46 AM
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bluebee bluebee is offline
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Dunno exactly what bolts but in the VERY best of E39 Links are torque specs reputedly for all the bolts in the E39.


None of these are my links so you'll have to look at 'em and let us know what you think of them.

If you find BETTER links, as always, please add to the bestlinks thread so that we're always pushing the ball of tribal knowledge forward, each of us kicking it forward a little bit at a time.
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  #5  
Old 01-24-2011, 05:08 PM
cambrian123456 cambrian123456 is offline
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By the RealOEM diagram, seems that the bolt is size M14x1.5. I took a picture (attached) that shows the grade 10.9. By page 7 of the Tightening Torques doc, it seems that this bolt should be torqued to a max of 200 Nm, which I believe is double my wheel lug nut torque.

If there's no evidence of Loctite on the factory install, I don't think I'm going to add it. Torque should be enough, but I'll retorque after 100 km, like lug nuts.
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  #6  
Old 01-25-2011, 06:52 AM
cambrian123456 cambrian123456 is offline
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On second thought, 200 Nm is ridiculous! I believe that is the max spec! Obviously the torque depends on bolt and thread material.

Elsewhere in that e38 doc, there's specs for other M14 bolts:

- Drain plug for coolant on engine block: 25Nm
- Splined shaft to intake camshaft: 40 Nm at an angle of 60
- Banjo bolt to VANOS controller: 32 Nm
- Spark plugs: 30 +- 3 Nm
- Fuel filter coupling nut and hollow bolt: 14 Nm
- Radiator hose hollow bolt: 27 Nm
- Radiator hose screw in fitting on transission: 37 Nm
- trans. plug on transfer plate: 40 Nm

I'll have to keep looking to find a spec on bolt I'm interested in.
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  #7  
Old 01-25-2011, 07:03 AM
cambrian123456 cambrian123456 is offline
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Bentley Manual Torque Spec

Does anyone have the Bentley manual and would be able to look up the torque spec?
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  #8  
Old 01-25-2011, 07:23 AM
cn90 cn90 is offline
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Go to BMW dealer and ask a tech re torques. They usually help you.
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  #9  
Old 01-25-2011, 09:00 AM
cambrian123456 cambrian123456 is offline
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Ah, just looked at the Bentley manual, Section 330-10.

Tightening Torques
Shock absorber to upper mount 27 Nm (20 ft-lb)
(M14, replace self-locking nut)
Quick coupling screw to air shock absorber 2 Nm (18 in-lb)
Road wheel to hub 120+-10 Nm (89 +- 7 ft-lb) - this is higher than my owner's manual states
Shock absorber to swing arm 127 Nm (94 ft-lb)
Strut mount to body
- Gray fasteners 28 Nm (21 ft-lb)
- Yellow fasteners 24 Nm (18 ft-lb)

There you have it!
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  #10  
Old 01-25-2011, 10:08 PM
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bluebee bluebee is offline
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Wasn't the torque spec also in the links I noted for you?
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  #11  
Old 01-26-2011, 06:54 AM
cambrian123456 cambrian123456 is offline
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No, there wasn't a torque spec for suspension components. Only max torques for all bolt sizes. Perhaps I missed something.
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