Author Manual cam chain tensioner - Gen2  (Read 965 times)

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  • Offline Saloonatic67   scotland

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    Offline Saloonatic67

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    Manual cam chain tensioner - Gen2
    on: May 16, 2023, 07:14:39 pm
    May 16, 2023, 07:14:39 pm
    I've finally managed to locate a manual cam chain tensioner for the bike  :152:
    The Gen 2 tensioner is located in the rear of the engine block, unlike the Gen 1, and is a completely different thread size.
    Once I've taken delivery I'll post up further details in case anyone is interested.

  • Offline Antares   gb

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    Offline Antares

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    Re: Manual cam chain tensioner - Gen2
    Reply #1 on: May 16, 2023, 09:34:24 pm
    May 16, 2023, 09:34:24 pm
    Is there a reason to do it in the first place on the gen 2? The reason it was replaced on Gen 1s was due to the noisy start up, nothing else. Under operation they work fine until things wear out a bit.

  • Offline smithy   au

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    Re: Manual cam chain tensioner - Gen2
    Reply #2 on: May 17, 2023, 04:00:34 am
    May 17, 2023, 04:00:34 am
    *Originally Posted by Saloonatic67 [+]
    I've finally managed to locate a manual cam chain tensioner for the bike  :152:
    The Gen 2 tensioner is located in the rear of the engine block, unlike the Gen 1, and is a completely different thread size.
    Once I've taken delivery I'll post up further details in case anyone is interested.

    The reason the Gen-1 tensioner is at the front of the engine is due to the fact that the Gen-1 cams and camchain spin backwards, Gen-2's all spin in the normal direction.

    Smithy.
    When I die, I want to go peacefully in my sleep like my Grandfather....not screaming like the passengers in his car..!

  • Offline esso_sa   ba

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    Offline esso_sa

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    Re: Manual cam chain tensioner - Gen2
    Reply #3 on: May 17, 2023, 10:38:06 am
    May 17, 2023, 10:38:06 am
    *Originally Posted by smithy [+]
    The reason the Gen-1 tensioner is at the front of the engine is due to the fact that the Gen-1 cams and camchain spin backwards, Gen-2's all spin in the normal direction.

    Smithy.

    As far as I know, cam chain on Gen 2 spins clockwise (normal) direction, but the camshafts spin counterclockwise, since the chain rotation is transferred to cams via the intermediate gear inside the cylinder head.
    Last Edit: May 17, 2023, 11:01:03 am by esso_sa

  • Offline smithy   au

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    Offline smithy

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    Re: Manual cam chain tensioner - Gen2
    Reply #4 on: May 17, 2023, 08:33:15 pm
    May 17, 2023, 08:33:15 pm
    *Originally Posted by esso_sa [+]
    As far as I know, cam chain on Gen 2 spins clockwise (normal) direction, but the camshafts spin counterclockwise, since the chain rotation is transferred to cams via the intermediate gear inside the cylinder head.

    I believe you're correct Sir..! The Gen-1 does it with the "intermediate gear" running off the crankshaft.

    Smithy.
    When I die, I want to go peacefully in my sleep like my Grandfather....not screaming like the passengers in his car..!

  • Offline Saloonatic67   scotland

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    Offline Saloonatic67

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    Re: Manual cam chain tensioner - Gen2
    Reply #5 on: May 27, 2023, 09:57:54 am
    May 27, 2023, 09:57:54 am
    *Originally Posted by Antares [+]
    Is there a reason to do it in the first place on the gen 2? The reason it was replaced on Gen 1s was due to the noisy start up, nothing else. Under operation they work fine until things wear out a bit.

    My bike is on it's second tensioner already. It was replaced under warranty as the chain rattled on every start up, even if the engine had only been stopped for a few seconds. BMW reckoned the tensioner wasn't retaining oil as it should.

    Anyway, the manual tensioner has arrived. I've had a look but don't think I'll be fitting it any time soon, as there's no access to allow adjustment  :084: I don't fancy the repeat process of fit, check, remove, adjust, refit over & over until it's right.
    The Gen 1 tensioner position allows easy access to adjust but the Gen 2 is to the rear of the engine, tight against the frame, with no access either above or to the rear so you can get at it with the required allen key.
    I guess I'll just need to get used to the inherent noise of this engine and wear ear plugs  :034:
    Last Edit: May 27, 2023, 09:58:45 am by Saloonatic67