Coolant Res on M42 radiator

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  • _r2h
    Member
    • Jun 2011
    • 41

    #1

    Coolant Res on M42 radiator

    Where do most route the m42 coolant res outlet to on an m20 setup? Car currently has a mish/mash of an early and late cooling setup that i'd like to convert fully to late and m42 setup.

    Thanks.

    87' 325i.
    '87 325i
  • Sagaris
    R3VLimited
    • Sep 2009
    • 2243

    #2
    I didn't find very good information on the web about using the M42 radiator with an M20 so I improvised: I cut the hose for my M20 overflow tank, got a 3/4" to 1" I.D. adapter at home depot and ran a 1" I.D. hose to the M42 overflow tank.

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    • _r2h
      Member
      • Jun 2011
      • 41

      #3
      I'd like to move to the late model water pump, so that hose/connection would be deleted. Best I can figure is to T into the upper radiator hose that feeds the pump, so you are staying close to the orginial design of the res supplying the pump.

      Bump for more suggestions.
      '87 325i

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