Does anyone have any idea why?
-Thanks Alex
First Time Rider
Arm chair racerNew to the board
ATC 250es leaks oil where exhaust meets head!
Does anyone have any idea why?
-Thanks Alex
Power User
Teaching quads a lesson
Its probably coming from the oval cover above the header pipe. These motors have a tendency to leak there. The oring under the oval cover doesnt seal well.
First Time Rider
Arm chair racerNew to the board
Should i tighten it?
Power User
Teaching quads a lesson
No, replace the oring or coat the mating surfaces with a thin layer of sealant.
First Time Rider
Arm chair racerNew to the board
Nah its not that i wiped the oil off started it up but it leaks directly from where the exhaust connects to the head...
-Alex
First Time Rider
Arm chair racerNew to the board
Heres a pic its a bit hard to see...
Power User
Teaching quads a lesson
If thats the case then I suspect the valve stem seal is bad.
First Time Rider
Arm chair racerNew to the board
How would I replace it?
Power User
Teaching quads a lesson
The head has to come off.
First Time Rider
Arm chair racerNew to the board
Looks like im back to work... hahaha
-Alex
Just Too Addicted
Arm chair racerJust too addicted
that ovel cover was a good start. are you sure that the valve cover is not leaking. it is that case that the oval cover mounts to. basically the top half of the head. it looks dry in pic but look before you assume valve seal.
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Power User
Teaching quads a lesson
Ya I agree. I think you should power wash the head real well and fire it up. the leak path should be very clear.
First Time Rider
Arm chair racerNew to the board
Heres another photo and yeh cleaning it sounds good i will attempt it later.
At The Back Of The Pack
Arm chair racerAt the back of the pack
Sure looks to me like it wicking down from the top of the motor????? I have an old harley.....LOL.....Ya learn to see trails.....
FACT ! I have no edit button
Arm chair racerThe day begins with 3WW
Hello
IF you wiped off oil from the valve cover area before the photo the valve cover is obviously leaking. As shovelryder mentioned, your photo clearly shows old burnt oil stains where it was coming from the cover at some point and running down all over the head and cylinder fins, it's plain as day! Of course the gasket may have been replaced but if there was ANY oil on the TOP side of your fins ABOVE the uppermost level of the exhaust then the gasket is burnt to a crisp from prolonged exposure to heat.
It may also have a SMALL leak at the ex gasket which could be either guides, guide seals and/or piston rings but you should hear a slight ex leak if the ex gasket is leaking.
Does it smoke white or light blue gray smoke? If so you are burning oil and need to do a compression test before tear down then check cyl bore for out of round and taper if ok then deglaze before installing new rings.
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