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      02-15-2017, 03:20 PM   #336
F36420I
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Drives: Bmw 420I Gran Coupe
Join Date: Dec 2014
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Quote:
Originally Posted by F30ed View Post
Interesting that there are 2 versions of the tensioner. The one shown in ISTA print - old version. It is shorter and has weaker spring inside (it is spring loaded as someone said above). Newer version is a bit longer piston move and spring is stronger too. Slightly longer reach and slightly stronger spring may make a difference for the chain slack at engine start and thus consequent parasitic forces and vibrations. Replacing tensioner might be a cheap and fast change to prevent expensive engine damage.

(As always, just a theory)

Hello nice find!

Do you know the part number of the new one and tightening torque for it?

Last edited by F36420I; 02-15-2017 at 03:29 PM..
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