Question about 2005 Yamaha WR 250 F

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Yamaha WR250F Leaking coolant

There is a small hole (which is obviously meant to be there) in the bottom of the righthand crankcase cover just under the water pump that leaks coolant when the engine warms up. Could it be possible that the water pump seal as failed? There does not appear to be any water in the oil.

regards, Nick

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Yes thats the weep hole it leaks when your water pump iner seal starts going bad,

Posted on Nov 30, 2008

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What does the inner water pump seal on an wr250f look like?

Posted on Jun 18, 2010

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Coolant is slowly leaking out of the small hole on the bottom of my water pump casing. What do I need to do to fix this?


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Before doing either of these jobs, you'll have to run the engine for 8 to 10 minutes to warm up the engine, oil and water.

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Go back to the drain plug, remove and let whatever oil has collected drain out, then reinstall, tightening to 32 ft.-lbs (43nm).

Pour about 3 1/2 quarts of oil into the crankcase, replace the oil fill cover, start the engine and check for leaks at both the drain plug and the filter, tighten as necessary. To check the oil level, look for a glass window on the right side of the crankcase marked for high (max) and low (min) levels. Get on hands and knees and look under the front crankcase cover directly beside the right operator's footrest; you'll probably need a flashlight to read it. Once the oil level is between the minimum and maximum markings, tighten the oil fill cover, and return the bike to its' normal parking position on the kickstand.

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