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3.0d A/C belt tensioner question - resolved

Posted: Sun Apr 03, 2016 10:26 pm
by wpoll
For the few of us on the forum with the 3.0d (M57TD...) - has anyone replaced the A/C belt tensioner? What did you replace it with? OEM part?

I'm getting ready to do some maint. (Oil Service) and will replace the A/C belt tensioner while I'm in the engine bay, as it's stuffed. Looking up the BMW part number gives me 64557786706. Searching this part gives me a number of different options - some are the full tensioner pulley inc. the pivot arm and others are just a pulley wheel and bearing.

I would replace just the internal bearing if I thought I could get it out of the pulley wheel without breaking the pulley wheel, but I guess it's a cheap enough part to replace at least the whole pulley and bearing. I *think* the pulley wheel is 65mm x 21mm but some options seem to be 70mm x 26mm.

If you have replaced yours, what did you use? Do you have either the measurements or the old part to measure up? I have the under-shield back on the car right now and so cannot measure my own one - I will remove it all again if I have to but I though it worth asking here first!  ;)

TIA...

Re: 3.0d A/C belt tensioner question

Posted: Wed Apr 13, 2016 6:29 am
by qwertik
I have replaced my one for: gates T39038.  Facelift 3.0D, about £50 from ebay.

Re: 3.0d A/C belt tensioner question

Posted: Sat Apr 16, 2016 7:38 am
by wpoll