Leaking Oil

2740 Views 4 Replies 3 Participants Last post by yfzstar410, Mar 8, 2009

yfzstar410

Discussion Starter · Mar 4, 2009

Hi everyone, newbie here.

just wanna start off saying i've always loved yami's and started really riding the mx quads just a couple years ago and purchased my 04' yfz (used obviously) almost a year ago. I was curious if anyone could tell me what is the point of this hole in the side of the cylinder? I am leaking a little oil out of it along with what looks like more oil out of my exhaust port and header.

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2fast4uracingxc

· #2 · Mar 4, 2009

thats the drain hole for where the spark plug is.make sure your spark plug is tight

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CADWELL

· #3 · Mar 4, 2009

If you're sure it's oil you're leaking from thee, you might ant to replace your valve cover gasket aswell. I couldn't think of another reason while oil would be coming from there.

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yfzstar410

Discussion Starter · #4 · Mar 4, 2009

thanks for the help fellas. Also, what are some of the signs of a leaky valve? If oil were leaking passed one of the intake valves, would it change to a gas or smoke through the combustion process or stay a liquid and leak outta the exhaust?

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yfzstar410

Discussion Starter · #5 · Mar 8, 2009

i pulled my valve cover off and turns out i do need a new valve cover gasket. there is a tear on the gasket right by the spark plug which would explain oil comming out of that hole. as for what i am seeing comming out of the exhaust. i just installed a new gytr pipe and heard its just the gasket melting. but i pulled the plug and it looked like this after i wiped it off a little with a rag. are one of my valves leaking?

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