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Yamaha special "L" plug on head.

chem3233

By chem3233
in Yamaha ATV Forum

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Frank Angerano Grand Master

Frank Angerano

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Posted

Ok gotcha. Never knew the name of it. Was the head or valve covers look like they were ever taken off ? Maybe not put back in properly?

I’ve heard that in some instances  the crank case vent lines get clogged or pinched and build up pressure inside the engine pushing on them. I would make sure that the engine is vented properly and all vent hoses are clear.  

Maybe reinstall with a good gasket adhesive and let them dry for 24 hours before running. 

  • 2 weeks later...
chem3233 Rookie

chem3233

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Posted

Thank you sir!

That seems to have worked. I did just that. I  got the red high temp and put it back and started it up today and no leaks. My yard is too wet to play to much but let it run close to an hour.

Again thanks!

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