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Message: <blockquote data-quote="AApple" data-source="post: 172083" data-attributes="member: 56">Do you ride this thing often, or does it sit for extended periods?If there is no coolant getting into the engine oil then your coolant "leak" has to be the large o-ring behind the pump body, or the ceramic seal on the front side, behind the impeller. A leak at the smaller seal on the very rear of the pump would normally also allow engine oil to leak from the weep hole, but it would NOT create a coolant leak from there....the pump itself also has a weep hole in it, so a leak from the ceramic seal would dump coolant directly out the weep hole in the housing, never getting back to the rear o-ring. I wouldn't condemn the pump itself at that mileage, unless you don't use enough anti-freeze, or it is mixed with too much plain water. Anti-freeze contains lubricants for the ceramic seal on the pump impeller, and running straight water, or a mix that is too water diluted can cause the ceramic seal to not seal properly. Running a pump with NO coolant at all, even for a short time can also damage the ceramic seal. Sometimes, just doing a coolant change/flush will get the ceramic seal back in shape, and sealing again. Like others, I would also wait until it got worse to tear into it to find the actual leak point. I'd bet it is the larger o-ring that is seeping....btdt.  :blush:</blockquote>