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Need Help Diagnosing Blown Head Gasket?
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[QUOTE="razorboy, post: 1222890, member: 62244"] Hey Fellas, My son was running his KX85 this past Saturday without issues. Suddenly, it simply died coming around a corner and it would not start again. We tried in vain to get it going in the pits but finally had to pack up and go home. The coolant level had been down the week prior and when I checked, it was down again. At first I thought that he had lost his coolant and the cylinder had overheated but that didn't make sense since it was kicking over fine even after it stopped running? I tested the compression and it is down to 60psi. A friend thought it might just be a blown head gasket so I pulled the head off last night. Difficult to say if it is just the head gasket though? Here is what I found: Pulled the plug - It was white and had a crystalized look to the tip. Drained the coolant - there was a LOT more coolant coming out of the bike then what I added on Saturday so it wasn't as low as I thought. The gasket looks questionable. It has areas that look like the coating has dissolved away from the metal. Head may be slightly warped - I placed a straight-edge across it and can see a little light. The cylinder walls appear to be fine (no visual gouges) The piston has some deformation around the front at the top. It looks like a little lip has formed but I have absolutely no clue as to why that would be there? One more thing, if the headgasket blows to the inside of the cylinder and coolant gets in the cylinder, will it leak past the rings and get in with the tranny oil? I ask because the tranny oil looks thin. I haven't drained it yet but will today. I can slosh it back and forth if I rock the bike and look through the glass. Doesn't seem right for oil? Hope this info will help me get a concise answer. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Need Help Diagnosing Blown Head Gasket?
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