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Water in oil

Discussion in 'Flat Fender Tech' started by CJ-X, Feb 18, 2007.

  1. Feb 18, 2007
    CJ-X

    CJ-X Member

    Ohio
    Joined:
    Aug 6, 2006
    Messages:
    816
    Got a flat head with water leaving the radiator and entering the block. Replaced head gasket. Motor does not have white smoke. Getting ready to pull the motor. Anybody know of any good ways to find the leak?
     
    CJ-X, Feb 18, 2007
    #1
  2. Feb 19, 2007
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,275
    Honestly, the only good way is to tear it down and have the parts magnafluxed IMHO. Any good machine shop should be able to do it for you. Even if you could find it another way, other than the head gasket there's not a whole lot you can do to fix an internal leak...
     
    w3srl, Feb 19, 2007
    #2
  3. Feb 19, 2007
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
    Messages:
    2,793
    If it turns out to be a cylinder wall leak then you can have the block sleeved. That will seal any cylinder wall cracks.:) Any cracks any where else, I think you are in line for a new block. good luck.:cry:
    :coffee:
     
    1960willyscj5, Feb 19, 2007
    #3
  4. Feb 19, 2007
    CJ-X

    CJ-X Member

    Ohio
    Joined:
    Aug 6, 2006
    Messages:
    816
    I am going to try to fill the block with water and maybe pressurize it with air. I have a couple other blocks if I need them. But if I found a leak in a harmless place; Couldn't I weld it with nickel 99 rods?
     
    CJ-X, Feb 19, 2007
    #4
  5. Feb 20, 2007
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    If the leak is in a water jacket, I highly doubt that you'll ever get it to seal for long by welding it. Welding cast iron is a tricky proposition under any circumstance, and if you have another good block lying around I would recommend that you use it.
     
    w3srl, Feb 20, 2007
    #5
  6. Feb 20, 2007
    jeepen

    jeepen Member

    Spokane WA
    Joined:
    Dec 8, 2006
    Messages:
    110
    what we have done in the past on deisals is to pull the pan and pressurise the cooling system go under the motor and look for leaks.
    good luck

    welding cast is hard because the crack most of the time will run even when stop drilling.
     
    jeepen, Feb 20, 2007
    #6
  7. Feb 20, 2007
    cj-john

    cj-john Member

    Galveston, IN.
    Joined:
    Aug 9, 2006
    Messages:
    242
    If you really don't want to tear it down any time soon you might try a bottle of ceramic seal. Moroso sells it for cracked heads and blocks. I cracked a head on my race car several years ago. Took out the spark plug and fired it up. Pumping water out big time. Dumped in a bottle of ceramic seal and left it running. After about 10 minutes it quit leaking. Ran the rest of the season. Probably would have ran longer but I hated to chance it. Just a thought, might get you by...
     
    cj-john, Feb 20, 2007
    #7
  8. Feb 20, 2007
    jeep2003

    jeep2003 Well-Known Member

    Upstate NY
    Joined:
    May 30, 2006
    Messages:
    1,928
    mine had a crack from the bottom of the cylender all the way up to the valve seat. They welded it and its great now. He said they can weld almost anyhing in the block. Doesnt cost much either :) good luck
     
    jeep2003, Feb 20, 2007
    #8
  9. Feb 20, 2007
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Sep 23, 2002
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    12,529
    K&W makes a similar product called block sealer. Works great! Used it on my F-head when the head cracked. Nickmil
     
    nickmil, Feb 20, 2007
    #9
  10. Feb 21, 2007
    CJ-X

    CJ-X Member

    Ohio
    Joined:
    Aug 6, 2006
    Messages:
    816
    Thanks for all the input. I will let you all know what I find. Probably this weekend.
     
    CJ-X, Feb 21, 2007
    #10
  11. Feb 28, 2007
    CJ-X

    CJ-X Member

    Ohio
    Joined:
    Aug 6, 2006
    Messages:
    816
    Pulled the motor, pulled the crankshaft out, pulled the pistons out from the bottom, ran a radiator hose from the water pump to the thermostat housing. Shot some air into the block drain valve. Found the leak somewhere in the distributer shaft hole. I don't see any reasonable way to repair it. Time for the new block I guess.
     
    CJ-X, Feb 28, 2007
    #11
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