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Timing belt again S90-V90

Still haven't got my parts in yet UPS no less. Question every thing is set up now for the change, I've marked the belt and related gears as instructed, when I reinstall everything and turn the motor over by hand twice to make sure the marks come back up correctly, will the marks on the belt come up ajascent to the marks on the gears? I guess that really won't matter though as long as the crank and cam gears come on their respected spots.
The tensioner is something I haven't taken off yet and with the restricted veiw I haven't figured out how it works to apply pressure to the pully.
I'm replacing all the pulleys and the tensioner, they have 200k on them now so better safe than sorry. The wheel on the serpintine tensioner is really slow when you give it a through, might have caught that one right in time.
Thanks
Poolman








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    Timing belt again S90-V90

    Hi Poolman,

    The marks won't line up after you rotate it. You don't have to worry about compressing the tensioner since your installing a new one. Good catch on the tensioner pulley for the serp. belt.

    DEWFPO
    --
    1998 S90 071,245 and 1995 964 154,100








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    Some photos that might help S90-V90

    Link to photos:
    http://photobucket.com/albums/v321/tjts1/engine%20stuff/

    PICT0017 is the new belt installed with a bungee holding the tensioner pulley in place before the new tensioner went in. This is the point where you check that all the marks line up. PICT0014 is the markings on the crank tensioner and belt. Note that aluminum cover has been removed. PICT0011 is another angle. PICT0008 is the old belt before being removed. Remember to also mark the direction the belt travels.

    The marks on the tensioner and the belt will not line up again once you have turned the belt over one full rotation. On the 94 the marks were off by 2 teeth after every rotation. It might be a different number on the later design belt. It pays to double and triple check, the number of teeth between the old and new belt. You can even line up the two belts together and visually check.
    After you have the new belt installed and you are sure that everything all your calculations are correct, turn the engine over by hand a couple of revolutions to check that there is no interference between the pistons and valves. Also you can check that the new belt is running in the middle of all the pulleys so there is no chance it will pop off. When you start up the engine the first time, do so with the belt cover off. After that give it another visual inspection. This is not a difficult job but patience does pay dividends.
    Also there is a curved aluminum cover underneath the crank pulley. Its a bit of a pain to remove and it has to be reinstalled before the new serpentine belt. Don't ask me how I figured that one out. Patience is a virtue.
    Good luck
    Justin









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      Sorry about double post. nm S90-V90








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    Some photos that might help S90-V90

    Link to photos:
    http://photobucket.com/albums/v321/tjts1/engine%20stuff/

    PICT0017 is the new belt installed with a bungee holding the tensioner pulley in place before the new tensioner went in. This is the point where you check that all the marks line up. PICT0014 is the markings on the crank tensioner and belt. Note that aluminum cover has been removed. PICT0011 is another angle. PICT0008 is the old belt before being removed. Remember to also mark the direction the belt travels.

    The marks on the tensioner and the belt will not line up again once you have turned the belt over one full rotation. On the 94 the marks were off by 2 teeth after every rotation. It might be a different number on the later design belt. It pays to double and triple check, the number of teeth between the old and new belt. You can even line up the two belts together and visually check.
    After you have the new belt installed and you are sure that everything all your calculations are correct, turn the engine over by hand a couple of revolutions to check that there is no interference between the pistons and valves. Also you can check that the new belt is running in the middle of all the pulleys so there is no chance it will pop off. When you start up the engine the first time, do so with the belt cover off. After that give it another visual inspection. This is not a difficult job but patience does pay dividends.
    Also there is a curved aluminum cover underneath the crank pulley. Its a bit of a pain to remove and it has to be reinstalled before the new serpentine belt. Don't ask me how I figured that one out. Patience is a virtue.
    Good luck
    Justin









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      Some photos that might help S90-V90

      Great photos tjts1, I'm finally getting a digital camera for my birthday, ordered it and it's on it's way. Hope to be able to post some photos soon.

      DEWFPO
      --
      1998 S90 071,245 and 1995 964 154,100








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    Timing belt again S90-V90

    If it's the hydralic tensioner, it has a slow steady pressure built up in it that keeps the belt tight. Compressing a new one, or the old one takes a large vise and a lot of patience while you turn teh handle a half turn and wait a while before turning it again until it is comperssed.
    --
    -------Robert, '93 940t, '90 240 wagon, '84 240 diesel (she's sick) , '80 245 diesel, '82 Mercedes 300SD







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