04kawasaki636

I have a 2004 Kawasaki 636. It seems to be burning oil somewhere, I havent found anywhere it is leaking but it's going somewhere. I noticed that my coolant reservoir has a milky line at the bottom, maybe oil has mixed in? Someone told me that the head gasket may be messed up. Can I get someone's opinion??

Green

The sludge in the bottom of the reservoir is probably because the coolant has never been flushed. Oil would be at the top, not the bottom. Is it burning the oil?

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Kawikid72

If its burning oil, best way to check... have someone start the bike up and you stand behind it looking at the exhaust, turn it on and give it some gas, if blue smoke comes out you're bike is indeed burning oil. To check if your head gasket is leaking head to your local pepboys or auto zone and buy leak glow. You mix it with the oil, put on googles that come with the kit and shine a light on your bike, you'll see a white|green or blue liquid depending what dye you get. Besides the res do you see any leaks anywhere? Under the bike after you park it or on the bike at all?

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All this is just ADVICE because at the end of the day, you can do whatever the FUCK you wanna do.

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williamr

Depending on the mileage and how the bike's been used you might have worn valve guides/stem seals and/or worn rings/bores. Leaking head gasket is possible, but you'd see oil in the coolant or vice versa.

A quick check is to look in the airbox. If there's significant oil in there you're looking at engine wear.

Although I like (and expect) my bikes to use no oil between scheduled changes, generally oil consumption of around 1 pint per 1,000 miles is considered acceptable.

Rob