Water Pump Repair Question
Posted March 04, 2001 - 02:51 PM
I need your advice. I have a 2000Wr with about 2500 hard miles. The water pump is starting to drip out of it's weep hole. Very very minor, but a potential warning for future long hot ride.
My question...according to the manual, its necessary to remove the (right) crankcase cover, not the clutch basket. Previous posts said it was necessary to remove the basket. Do you agree and do you have any other advice when I replace the inter and out seal on the impleller shalf?
Thanks and your advice is always appreciated.
Posted March 04, 2001 - 05:55 PM
[This message has been edited by Clark Mason (edited 03-04-2001).]
Posted March 04, 2001 - 09:07 PM
One last question and to anyone else, is it unusual to have a small amount of coolant loss via the weep hole? Even now, its not been enough to make a noticable difference at the overflow tank. Maybe I'm jumping to conclusions?
Posted March 05, 2001 - 08:05 AM
My impeller shaft had a nice groove in it so I replaced that as well as the outer seal. The inner seal was still good and didn’t wear a groove, I suspect this is due to the engine oil lubing the inner seal as Clark mentioned (but I replaced it and the bearing anyway while I was at it).
BTW you can replace the outer seal w/out removing the cover at all, just yank the impeller cover and impeller, pry out the old seal and stick the new one in there. Note the position, if you put it in backwards it will leak for sure. I used a butterfly air-impact, but I think with the bike in gear the impeller will come off with a normal wrench.
Hope this helps.
[This message has been edited by Hick (edited 03-05-2001).]
Posted March 05, 2001 - 05:55 PM
01 Yamaha Raptor
99 Kawasaki ZRX1100
99 Yamaha Warrior
Posted March 05, 2001 - 06:31 PM
If you try this route BE CAREFUL or you will be in for more work as others on the forum have found out the hardway.
Posted March 10, 2001 - 06:50 PM
This is for the record. If you have a water leak from the weep hole, then its time to replace the seal. I followed the above discussions and replaced both inner and outer seals, along with the impeller shaft. I also replaced the right side case gasket (the old one probably would have worked).
Inspection of the parts showed significant deteriation of the seal with lots of rubber molded into the shaft. The shaft also was a slightly grooved and probably could have saved with some emery cloth.
I'm surprised it was so bad with only 2500 to 2700 miles on it. Maybe the coolant was contaminated with dirt. I don't know. As a preventative measure, I believe it may be possible to keep the outer seal lubericated by occasionally spraying some wd-40 or silicone spray up the weep hole.