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Old 05-16-2014, 04:02 AM   #1
vudu_52 OP
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Cam Chain Tensioner Install

I purchased a new cam chain tensioner today part no. 11318531009.
Once I removed it from the packaging, I realised the spring seems too short?
Am I missing something, or doesn't the spring compress between the piston and the bolt?

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Old 05-16-2014, 06:08 AM   #2
FredRydr
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I cannot answer your question, but I googled for an image on the part number to see if the spring has been photographed elsewhere. It looks right. MAXBMW has this photo online:



Which led to this:



I also got this - go figure:



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Old 05-16-2014, 07:00 AM   #3
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It's fine.

Pull your old one out and you'll see.

The inside plunger does the work when there's oil pressure. The spring is a preloader. You're looking at it's unassembled state. Wait till you try to install it and you'll see what the spring does.


As for Fred's reply:


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Old 05-16-2014, 11:18 AM   #4
Girthy Knobkers
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I've done a few and have a tip! When trying to muscle that new one in, if you are having trouble with too much tension; put the bike in first gear and rotate the wheel forward. Not enough to rotate the engine but enough to move the crank just a hair or two (or 4). This will move the slack in the cam chain to the backside where you are installing the new tensioner. Works like a dream.
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Old 05-16-2014, 04:42 PM   #5
vudu_52 OP
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Thanks for the quick responses. I still don't understand how the preload would work but I'll pull it apart and see.
Thanks again for your help.
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Old 05-17-2014, 06:04 AM   #6
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Can you provide some detail on how this is done, pics, etc?
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Old 05-17-2014, 06:55 AM   #7
JRWooden
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Cam chain system wear measuring tool

Since we have a new "cam chain" thread going I'm going to throw something in:

It has been rumored that a tool exists that measures cam chain system wear - that it screws into the cam tensioner hole and measures the displacement of the chain (how far in it can be pushed with a calibrated force) Joel Wisman mentioned way back ............

I had the parts manager at the local dealership, who is a friend of mine, paw thru the dealer tool manual and he couldn't find it ...
(He owns and F800GS and I can assure you that he looked pretty hard ...)
that was about a year ago ... so maybe I'll ask him again...

Anyway.........If anybody ever gets any info on that tool please post!
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Old 05-18-2014, 11:46 PM   #8
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I see, I see........
The internals of the plunger is spring loaded as well!
Thanks guys.

Also force required to get the bolt started was superhuman, but the old bolt had very little pressure on it. I suspect the internal plunger was seized somehow.

Anyhow the engine is much quieter and seems to be less vibration too.
I'm lucky, I was expecting to do the cam chain too.......but not yet maybe.
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