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Cylinder head weep hole.

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Just rebuilt the motor in my 04 CRF 250..when running there is oil comming from the weep? hole thats in the right side of the cylinder head underneath the rocker arm shaft bolt hole.

What could cause oil to come from here? the motor seems to be getting very hot very quick, so im thinking that the oil pump is not timed correctly with the crankshaft. maybe one tooth off?

anyone got any suggestions?

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spark plug is torqued, still have oil comming from weep hole.

could it be oil blowing past the rings? But if it was oil from the bottom end, going past the rings it would just be burned and not flowing out of the weep hole right? Because there is no smoke from the exhaust leading to believe that oil is being burned...

Anyone?

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Did you check the rubber seal on the center of the valve cover? This is where the cover seals against the top of the plug well. Possibly pinched, torn, or gone all together....Maybe, while running, oil is leaking out if that circular seal, around the top of the plug well, and out the drain hole.

I can't think of any other reason you would have oil coming out of that

SEE ARROW NUMBER 2

plugwellcrf250.jpg

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