Hydraulic cam chain tensioner difficult to install.

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Bigred66
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Hydraulic cam chain tensioner difficult to install.

Postby Bigred66 » Tue Aug 22, 2017 10:02 pm

Hi all,I removed the cam chain tensioner from my f800s for inspection. Bike is parked in neutral and it's neigh impossible to put the tensioner back in. Any advice on how to sort this out would be appreciated. Thanks in advance.

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Galactic Greyhound
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Country of Residence: Scotland
Location: Dumfries

Re: Hydraulic cam chain tensioner difficult to install.

Postby Galactic Greyhound » Tue Aug 22, 2017 10:16 pm

Hi Bigred,

I responded to this in your 'Introduce Yourself' post - copied here for convenience:

I'm not familiar with the F800S but is your problem that you cannot get the threads to engage on the securing cap screw?

If so, then you need to ensure that the piston/spring assembly is compressed sufficiently before you engage the threads of the cap screw.
This is done by pressing down on the cap screw and, at the same time, turn the cap screw to engage the threads.

If you still cannot get the threads to engage, then remove the Chain Tensioner Cylinder (use a magnetic pick up tool).
Check if it is a two-part cylinder with one cylinder inside another.
If so, can you compress the cylinders?

If not, the cylinders may be hydraulically locked at maximum extension thus preventing the cap screw engaging with the threads.
See if one cylinder has a ball-valve on it which is retaining oil inside the two cylinders.
Press in the ball-valve while compressing the cylinders to reduce the overall length and release the oil inside.

RealOEM Parts Fiche - Cam Chain - See Item 15:
http://www.realoem.com/bmw/enUS/showpar ... Id=11_4004

See this video re the above:
https://www.youtube.com/watch?v=jBgO_Fbn02A
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" onclick="window.open(this.href);return false; - It works!

Bigred66
Forum User
Posts: 5
Joined: Tue Aug 22, 2017 8:32 pm
Country of Residence: Northern Ireland

Re: Hydraulic cam chain tensioner difficult to install.

Postby Bigred66 » Tue Aug 22, 2017 10:36 pm

Hi, thank u for your reply. I've tried unsuccessfully to screw it in and it all compresses ok. I think I will leave it to the experts in future. I have read about putting it in 6th gear and gently rocking the back wheel whilst keeping tension on the chain.

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Galactic Greyhound
Moderator/Club Member
Posts: 7765
Joined: Sat Aug 28, 2010 11:26 pm
Country of Residence: Scotland
Location: Dumfries

Re: Hydraulic cam chain tensioner difficult to install.

Postby Galactic Greyhound » Tue Aug 22, 2017 10:43 pm

Hi, thank u for your reply. I've tried unsuccessfully to screw it in and it all compresses ok. I think I will leave it to the experts in future. I have read about putting it in 6th gear and gently rocking the back wheel whilst keeping tension on the chain.

Our Professional mechanic 'Jaythro' has also replied to you about this in the 'Introduce Yourself' section - check out his post.
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" onclick="window.open(this.href);return false; - It works!


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