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Tractor Talk Discussion Forum

67 - 4020 engine leak

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mike

01-24-2004 08:43:27




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Just bought a 67 model 4020 one owner with 4331 hrs on it. Nice and straight tractor that runs and drives perfect. Coolant is leaking from the weep holes on left side of block. Leaks a little when both hot and cold from two of the holes.Will take 1/2 gallon to top of in a week. Engine will start in cold weather and no blow by, use no oil in 30 hrs of hard work.
thanks in advance
okie




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Ray

01-24-2004 15:58:53




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 Re: 67 - 4020 engine leak in reply to mike, 01-24-2004 08:43:27  
Put a big can of bars stop leek in and run it



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Brokenwrench

01-24-2004 14:30:25




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 Re: 67 - 4020 engine leak in reply to mike, 01-24-2004 08:43:27  
Best case scenario is that you will have to pull the liners and replace the liner seals.Worst case,the liners have rusted and or pitted to the point where it will require replacement of the liners. This can usually be avoided by testing the ph of the antifreeze and the addition of coolant conditioner on a regular basis.



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doug@upr

01-24-2004 12:21:58




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 Re: 67 - 4020 engine leak in reply to mike, 01-24-2004 08:43:27  
not sure what your question is, but the weep holes were designed to alert the operator of the tractor that your engine is going to need work fairly soon, now depending on the degree of electrolysis on your sleeves you could get away with anywhere from 1 month to maybe even 5 years, again all that the weeps mean is a warning and if your adding that much antifreeze a week then your time is probably on the short side of 5 years.

your engine block has 3 grooves in the lower counterbores the top & bottom grooves have o-rings in them while the middle one usaully is left empty, so when the top o-ring has become eroded enough to let fluid pass by then the lower one still holds the fluid out of the crankcase, while allowing it to escape through the weep holes. myself when i rebiuld jd motors usaully will install an extra o-ring in that middle groove, just a little extra longevity on that area of the motor

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