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BMW E60 5 Series 2004-2010 (525i, 528i, 530i, 535i, 545i, 550i) 2007 530XI Belt tensioner and idler pulley bolt torque


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Last Post: Jul 17, 2016 4:33 PM Last Post By: njlou
KevD16

Posts: 2
Registered: 12/23/13
2007 530XI Belt tensioner and idler pulley bolt torque
Posted: Dec 23, 2013 11:33 AM
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I have the Bentley service manual and cannot find this information anywhere. I know the drive belt tensioner bolt has to be torqued and then +90 degrees. Is it available in the manual somewhere? I've gotten information on some forums but want to be sure before installing.
Thanks,
Kevin
Charlie

Posts: 4,782
Registered: 12/09/03
Re: 2007 530XI Belt tensioner and idler pulley bolt torque
Posted: Dec 23, 2013 2:22 PM   in response to: KevD16 in response to: KevD16
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Hi Kevin,

Thanks for writing Bentley Publishers. There have been a few inquiries regarding this bolt. Apologies for the inconvenience. Found this in BMW's tech info. Hope this helps.

I looked up a late 530i (2007 -2010 530i/xi). According to parts, the earlier ones use the Same 65mm alum bolt.

Regards,

Charlie
_____________________

Belt tensioner to crankcase (The end faces of the aluminium screw heads are painted blue).

N52K / Not for E70 N52K B30

M11 x 65

Replace screw. Thread repairs are not permitted! Jointing torque and angle
of rotation must be observed without fail.

Jointing torque - 25 Nm

Torque angle = 90
KevD16

Posts: 2
Registered: 12/23/13
Re: 2007 530XI Belt tensioner and idler pulley bolt torque
Posted: Dec 23, 2013 2:40 PM   in response to: Charlie in response to: Charlie
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Thanks, what about the idler pulley? This bolt is reusable.
Kevin
Charlie

Posts: 4,782
Registered: 12/09/03
Re: 2007 530XI Belt tensioner and idler pulley bolt torque
Posted: Dec 23, 2013 3:13 PM   in response to: KevD16 in response to: KevD16
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Kevin,

Nowhere in factory info can I find the spec for the idler pulley, but the idler pulley on the alternator is spec'd at 40 Nm or (~30 ft-lb). Need to look into it further, but wanted to get something out to you. Does that seem right to you?

-Charlie
njlou

Posts: 1
Registered: 07/17/16
Re: 2007 530XI Belt tensioner and idler pulley bolt torque
Posted: Jul 17, 2016 4:33 PM   in response to: KevD16 in response to: KevD16
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HI I have an almost identical question for a 2008 BMW 528xi.
I have to install a Belt tensioner and idler pulley also.
The info is not covered in my Bentley manual.

AFAIK: bolt torque -
Belt tensioner = 25nm / ~18 ft lb + 90degrees
AL bolt to be replaced

Idler pulley = 40 nm / ~29 ft lb
Bolt to be reused

please verify.
Thanks

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