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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 29, 2016 10:18 PM Last Post By: 550I
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
550I

Posts: 1
Registered: 07/29/16
Re: 2007 530XI Belt tensioner and idler pulley bolt torque
Posted: Jul 29, 2016 10:18 PM   in response to: KevD16 in response to: KevD16
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I need to know the torque spec for the belt Tensioner to the engine also not in the Bentley manual for my 08 550i v8 N62TU engine Please? This should really be in there it is a very common job.?:|

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