Author Topic: Coolant leak into crankcase  (Read 2675 times)

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Offline twosmokerider116

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Coolant leak into crankcase
« on: June 17, 2012, 08:11:42 AM »
Okay, So I have a coolant leak into the crank case of my 86' Kx500> I changed the water pump seal but where else could the coolant possibly be leaking in from? Its a Lot.

Thanks.
86' Kx500 Pro Circuit Platinum, FMF Turbine Core II

Offline jonny500

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Re: Coolant leak into crankcase
« Reply #1 on: June 17, 2012, 09:15:01 AM »
i am sure that the only way coolant can mix with gear oil is past the water pump seal. if you have replaced the seal there are 2 thing i would question. 1st: was the seal put in the right way (easy mistake done it my self). 2nd: what was the condition of the shaft where the seal runs. if the the surface is bad it will ruin the new seal.

Offline twosmokerider116

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Re: Coolant leak into crankcase
« Reply #2 on: June 28, 2012, 11:39:28 AM »
I think i put it in right, what mistake did you make?
86' Kx500 Pro Circuit Platinum, FMF Turbine Core II

Offline kxpegger

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Re: Coolant leak into crankcase
« Reply #3 on: June 28, 2012, 04:22:04 PM »
If it's in the crank case it might be a head gasket.
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"05" RMZ450, "08" KX500AF "11" KTM 450SX-F "12" KTM 250SX "15" KTM450SX-F

Offline don46

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Re: Coolant leak into crankcase
« Reply #4 on: June 29, 2012, 10:22:25 AM »
Pegger, I think he means the gearbox, if it was a headgasket he would/should know that it is going to smoke white and show a loss in the coolant level. it almost has to be the water pump seal/shaft or both, of course there is the chance the case is cracked in the water pump area but I would find that unlikely.
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