Whats different about my motor

[nate7504]

Hello all i have in my scoot a P157QMJ, i have researched this and best i can come up with is the p just means a taller head, the reason i ask is i have a small oil leak i would like to fix this winter, i did not take the shroud off yet to locate it but i read these engines leak due to a crack by the timing chain cover, so if i have to replace the head will i need a different one then just a reg 150? Is there anymore info specific to this motor? I also read it has a little more hp.

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[snugglebunny]

i knew the answer to this but cant 'member.
but no i dont think you get any more HP
but as in most things, i am prob wrong

[Deleted]

First off it's an engine, not a motor.

That having been said and from what you described it's as likely to be the head gasket but the only way to tell for sure is to pull it apart, there is no such thing as a crack unless it's a gasket because if it's truly cracked you can plan on replacing the whole engine, I'd still see if I could narrow it down to make sure it's not just a leaking valve cover.

[nate7504]

I know its not the valve cover, i checked that first, its coming out right by the exhaust port, but the fan im sure is blowing it down there, i can let it idle all day with nothing but as soon as i ride it and put a load on the engine it leaks. Its not alot i have never had to add more then a table spoon or so every hundred miles, maybe not even that much. It has aprox 700 miles on it now.

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[justbuggin]

have you check the vent hose coming off the valve cover it maybe blow by dripping

[nate7504]

Yeah it is tight, that goes in to the air filter housing then collects in a little clear tube. Guess ill just pull the shroud off and check.

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