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Thread: Struggling with auxiliary water pump bypass please help

  1. #1
    Join Date
    Nov 2017
    Location
    Coalinga, ca united state
    Posts
    2
    My Cars
    1995 BMW 740 il

    Unhappy Struggling with auxiliary water pump bypass please help

    Hello. I am trying to bypass the entire control valve auxiliary pump because that plastic nipple broke off..... I haven't seen a clear diagram on what hose goes where.... I recently replaced all 4 hoses involved now I just want to drive my car.... And I'm not paying 500 for a new part... So anyway S could someone point me in the right direction... When I read hose 3 to 23 .... Doesn't help... When you don't know the hose numbers. Thank you for listening

  2. #2
    Join Date
    Feb 2010
    Location
    Hampshire UK
    Posts
    8,891
    My Cars
    99 840ci Sport Indv
    The E38 has the same circuit as the E31 - although the pump is different - but here's how it is done on the E31:

    http://www.meeknet.co.uk/e31/E31_Hea...eplacement.htm
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


    My BMW Repair YouTube Channel
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  3. #3
    Join Date
    Dec 2006
    Location
    San Jose, CA
    Posts
    1,272
    My Cars
    00 750IL, 01 740IL
    I tried rebuilding with new ebay seals, but it didn't work...I would get heat even with ac on. I end up using e53 x5 heater valves without the pump from eBay 50 bucks and it works great.

  4. #4
    Join Date
    Nov 2016
    Location
    Hansville, wa
    Posts
    972
    My Cars
    2001 750il Chrome line
    +1, mine came from the junkyard for $20.

  5. #5
    Join Date
    Nov 2017
    Location
    Coalinga, ca united state
    Posts
    2
    My Cars
    1995 BMW 740 il
    Thank you.... Very helpful .. Now I just need to undo my bypass.. I took the two hoses from the engine and looped them... I will now put hoses back the way you shown... Thank you..

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