So a few months ago I noticed some coolant coming out of my weep hole on the bottom of the water pump. Did a little research apparently somewhat common on the WR's for the water pump seals to go, at least specifically on the water side (water seal).
Anyway bought a replacement kit which had both oil and water seals as well as a bearing. Took the clutch case cover off replaced both seals and bearing (why not kit came with it all). All was well until yesterday. I had been running distilled water in the bike since I replaced the seals, about 4 months. Yesterday I finally got around to buying some coolant, throw the coolant in and crank it up. While I'm checking around the pump to make sure I tightened the drain bolt properly I noticed some liquid at the bottom of the pump cover. Figured it was just left over from when I drained it, wipe it away with a shop towel give the bike a rev and what do you know its &%$#@!ing leaking again.
I turned the bike off let it sit for about 10 minutes, cranked it back up and went for a quick spin down the road and back with a shop rag tucked underneath the pump cover. Got back and had a fair amount of coolant on it.
Anyway I'm about to order another seal and bearing set, I'll probably just try replacing the water side seal first this time as its quick and easy to get to.
My question is, even though people say this is somewhat common on the WR's is 4 months common? That seems a little crazy to me. When I replaced the first one as far as I know they were factory (kid that owned it before me didn't do anything to the bike).
I inspected the impeller shaft and it didn't seem to have any particular wear or lines where the seals sit on it. There is a step in the shaft but that's by design.
It sounds crazy but I'm going to drain the coolant tonight and put distilled back in it and run it and see if it still leaks. Just weird that it was fine all season then as soon as I finally swap out to coolant it starts leaking.
I don't want to spend the $40 on the shaft if the shaft is fine, which it seemed like it was.
Edited by gr4vitas, October 29, 2015 - 09:45 AM.