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  #1  
Old 07-09-2019, 06:29 PM
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Default Rm125 all coolant in gear oil

     

I have a 1991 rm125 just got it for cheap took ot out to ride she died and all of my coolant was in my gear box i think its a cracked block but any info would be amazing before i tear her apart thanks.
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Old 07-09-2019, 08:34 PM
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Could be a bad water pump seal.

Paw Paw
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Old 07-09-2019, 08:37 PM
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I pulled the water pump and clean fluid came out but alittle milky oil was around the rotor when i drained the oil nothing but clean coolant came out first then the pure 2% milk followed
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Old 07-09-2019, 08:40 PM
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Default All of my coolant is in my gear oil need some input

I just bought a 1991 rm125 cheap and figured something was going to blow something but i changed all the fluids and gave her a good clean up but i took her out for a good trail ride and all of my coolant was in the gear box i think a cracked lower somewhere any input would be great thanks guys
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Old 07-10-2019, 10:07 AM
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FYI, I merged your two threads together since they were about the same problem. I think PawPaw is on the right track, sounds like a bad seal in the water pump allowing the coolant to enter the crank case.
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