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Thread: Water Pump Swap

  1. #1
    Join Date
    Aug 2019
    Location
    NY
    Posts
    27
    My Cars
    85 735i

    Water Pump Swap

    Hi

    I recently changed the water pump to the screw on version by accident and now in the process of changing the fan clutch and pulley to match.

    My question is besides the 130mm pulley and the screw on clutch, is there anything else i have to change? Belts etc?

  2. #2
    Join Date
    Jun 2010
    Location
    TX
    Posts
    4,487
    My Cars
    1983/84/85 745i

    Thumbs up

    A 144mm pulley will work with the screw-on water pump.

    13x1055 belt.
    I make E23 parts.
    09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
    10/1984 745i
    11/1984 745i
    11/1984 735i (10:1-265/6)
    Ford, MB, and GM round out the pack.



  3. #3
    Join Date
    Aug 2019
    Location
    NY
    Posts
    27
    My Cars
    85 735i
    Isn't 144mm the original one? The one i have now wont seat properly on the water pump. This is the one i purchased btw: https://www.ebay.com/itm/Water-Pump-...gAAOxyuCJRfNLx

  4. #4
    Join Date
    Jun 2010
    Location
    TX
    Posts
    4,487
    My Cars
    1983/84/85 745i

    Thumbs up

    What belt are you using? What alternator are you using? Is alt fully loose?
    I make E23 parts.
    09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
    10/1984 745i
    11/1984 745i
    11/1984 735i (10:1-265/6)
    Ford, MB, and GM round out the pack.



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