bmw 520i tensioner [Archive] - BimmerNut.com Forums

yaofeng

03-30-2008, 05:06 AM

I never peeled away the rubber to look inside. I think it is only a spring to keep the the belt tension. I do know the tensioner on my SAAB's is more elaborate. It has a spring and is also a dampener using hydraulic fluid.

dwaynos

03-30-2008, 05:38 AM

hello, i have a bmw 520i L REG and i would like to know how the tensioner works on my fan belt is it automatic or mechanical?

thank you

whiskychaser

03-30-2008, 09:56 AM

hello, i have a bmw 520i L REG and i would like to know how the tensioner works on my fan belt is it automatic or mechanical?

thank you
If it looks like a mini shocker its automatic (see part 8 here)

http://www.realoem.com/bmw/showparts.do?model=HD68&mospid=47405&btnr=11_1344&hg=11&fg=18

Thats for a 525i but I guess as yours will be an M50 too it will probably be the same?