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View Full Version : M50 Serpentine Belt Tensioner Tool . . .


gale
06-09-2007, 05:41 PM
Donco special tool #567 temporarily compresses the tensioner for the a/c belt. Works like a champ:

http://www.nmia.com/~dgnrg/belt_tensioner.jpg

necessity is the mother of invention (bottle jack & c-clamp kept slipping off the ends)
Martin in Bellevue
06-09-2007, 05:55 PM
No prybars in yer town? Not that there is much room, but changing the belts on the m3 isn't as bad as the 535. Well, if the supacharger wasn't such a bulky thing.
Russell
06-09-2007, 08:43 PM
why do you need it? I have changed my ac belt with out any special tools. Am I missing something here?
gale
06-09-2007, 10:12 PM
why do you need it? I have changed my ac belt with out any special tools. Am I missing something here?

Maybe I'm just tired of working on this beast. I've been homesteading it for 2 weeks now changing the pan gasket & noticed a bunch of other stuff that needed attention while taking everything off.

It's in an e36 m50 which has 2 separate serpentine belts. The main belt swaps easily with a breaker bar on the tensioner but the tensioner/idler for the a/c (whose belt has to be removed to do the main belt) is buried behind the radiator with little room to get to it. The dash pot tensioner is wide open underneath so looked easy to get to it that way.
winfred
06-09-2007, 10:31 PM
prybar from the bottom gets em every time for me, but you can't pry on the rounded end of the shock or you can break the thin aluminum
Russell
06-10-2007, 03:15 AM
e36? thats different!
steve0suprem0
06-10-2007, 07:58 PM
dude, i nedd one of those! runnin sans ac since the tensioner busted apart when putting the belt back on after the supercharger install...

is there a clip in there holding the two halves together, or is it just held together by being in place?
winfred
06-10-2007, 08:12 PM
once it breaks apart it's crap 11 28 1 717 210 $57 list can probably be had 45-50 if you shop around


dude, i nedd one of those! runnin sans ac since the tensioner busted apart when putting the belt back on after the supercharger install...

is there a clip in there holding the two halves together, or is it just held together by being in place?
steve0suprem0
06-10-2007, 09:24 PM
once it breaks apart it's crap 11 28 1 717 210 $57 list can probably be had 45-50 if you shop around

bummer, i figured as much. well, looks like i'm gonna be shopping.

EDIT: pelican has it (listed for an e36) for 44. real oem has the same part number for e34, 36, 39 and z3... but the part number on gale's pic ends with the same numbers...

so the question is have is: if i get to the pick n pull and find one, it should be the same, right? also, do i need to put the tol on it first, then take it off, or will it stay together while i pull it?
winfred
06-10-2007, 10:36 PM
if it's not dead and broken it will stay together, weather or not theres any oil left in it to dampen the belt movement...... once they are old and dry they can get noisy