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Coolant leaking

Discussion in '456/550/575' started by dersark_painclinic, Jul 27, 2013.

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  1. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #1 dersark_painclinic, Jul 27, 2013
    I had a nice month of enjoying my car driving around after rebuilding the Water pump seeing how cool it was running. Today new problem, I have a coolant pouring from bottom of engine towards the back on the garage floor. I checked the valley it is dry. Back of the engine from top is dry too. I have not remove the under the engine cover to check where is coming from. I know all the trouble making hoses are in the valley. Any experienced friend can make a comments. I hate to go trough the pain of removing the plenum for nothing. Thanks
    Sark
     
  2. Cribbj

    Cribbj Formula 3
    BANNED

    Jan 1, 2011
    2,316
    Cooke City MT, The Coolest Small Town in America
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    John
    #2 Cribbj, Jul 27, 2013
    Sark, I'd get the undercover off and get it up on a lift with the expansion tank full, and the cooling system pressurised with a Stant pump, and see if you can see where it's coming from.

    There's so many possibilities for leakage it's tough to speculate where it could be coming from.

    The most likely culprit, unfortunately, is always the last thing you fooled with :) Of course, it could also be that since you rebuilt the pump, it's working so much better now, that the next weakest bit in the system failed.
     
  3. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    29,162
    socal
    #3 fatbillybob, Jul 27, 2013
    Stant makes an adapter that is our screw pattern of the tank cap. I forget which one it is.
     
  4. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #4 dersark_painclinic, Jul 27, 2013
  5. wbklink

    wbklink F1 Rookie

    Sep 2, 2009
    3,420
    Los Angeles
    Full Name:
    Bill Karp
    #5 wbklink, Jul 28, 2013
  6. moorfan

    moorfan Formula Junior

    May 11, 2009
    809
    Central Virginia
    Full Name:
    Pete
    #6 moorfan, Jul 28, 2013
    Sark,
    The first thing I would do is take off the front belt shields and look very carefully at the water pump, particularly the port on its underside. If the placement of the sealing ring wasn't perfect inside the water pump it will leak out of that port on the underside. Doing this and removing the undertray will reveal the answer, I bet.
    I agree with John...start with the most likely possibility.
    Best of luck...take pictures :)

    Regards,
    Pete
     
  7. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #7 dersark_painclinic, Jul 28, 2013
    Pete, I will check today.
    Bill, as soon as I verify, I will add to the thread.

    Sark
     
  8. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #8 dersark_painclinic, Jul 28, 2013
    Today I took the water pump cover and the under tray off. Onestly I don't see any trace of coolant there. The water pump drain port and underneath gears and belts showes no sign of collant spots. Underneath and the sides of engines where dry too. I believe I should wait until the pressure tester arrives.
    Sark
     
  9. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #9 dersark_painclinic, Aug 1, 2013
    Today I received the Stant 12018 adaptor in mail, it dose not fit on the tank. Appears to have different treads, anybody knows the right adaptor so I can proceed with the diagnosis. Any help appreciated. Sark
     
  10. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    29,162
    socal
    #10 fatbillybob, Aug 2, 2013
    did you measure it or guess the size. I get 44.8mm x 4mm so maybe the thread is 45x4 metric?
     
  11. Mr. V

    Mr. V Formula 3

    Oct 23, 2004
    1,247
    Portland, Oregon
    #11 Mr. V, Aug 2, 2013
    Does your car have the two electric water pumps at the rear of the engine, like in my 456?

    Could be a hose failure there.
     
  12. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #12 dersark_painclinic, Aug 2, 2013
    FBB, I did not measure it myself, it was recommended by somebody on this forum.
    Mr V. I don't think 550 has electrical water pump,except the heather pump.
    Sark
     
  13. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #13 dersark_painclinic, Aug 2, 2013
    FBB, I am thinking of using the actual coolant tank cap as an adapter.
    Sark
     
  14. ferraridriver

    ferraridriver F1 Rookie

    Aug 8, 2002
    4,152
    Bay Area Calif.
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    Dave
    #14 ferraridriver, Aug 2, 2013
  15. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    29,162
    socal
    #15 fatbillybob, Aug 2, 2013
    Dave is right of course!
     
  16. Cribbj

    Cribbj Formula 3
    BANNED

    Jan 1, 2011
    2,316
    Cooke City MT, The Coolest Small Town in America
    Full Name:
    John
    #16 Cribbj, Aug 3, 2013

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