Need help with water pump?
Posted February 08, 2005 - 03:04 PM
Posted February 08, 2005 - 05:09 PM
Posted February 08, 2005 - 06:05 PM
Posted February 22, 2005 - 02:27 PM
Posted April 23, 2005 - 05:12 AM
Posted April 23, 2005 - 07:16 AM
Posted April 23, 2005 - 11:00 AM
I didnt even think about using the pink Toyota coolant. I'm due for a coolant change - guess I'm off to the Toyota dealer
Posted January 25, 2006 - 11:55 AM
I did a search on leaking water pumps and have more questions. I bought a used 04 WR450 last week. The previous owner had just changed the two seals on the water pump (oil and coolant side), but I noticed when I started it up this weekend a puddle of coolant under the weep hole. The leak stopped almost immediately upon startup. And no further drips as the engine warmed up.
It was below freezing when I fired the bike up. Could extremely cold weather starts contribute to the problem?
Or is it likely the impeller shaft had some damage? The guy did say he checked it thoroughly.
Posted January 25, 2006 - 12:44 PM
Posted January 25, 2006 - 09:47 PM
Posted January 26, 2006 - 06:01 AM
Just replaced the seals and shaft in my 03's water pump. Indy gave me the parts list and if I would have ordered the numbers he gave me everything would have gone smooth, BUT, I didn't. Anyway I did it and if I can, anyone can.
Here are the part #'s and some photos to go along with it.
Parts to order:
#5GR-12458-00-00 SHAFT, IMPELLER
#93109-11073-00 OIL SEAL (water side seal)
#93102-12321-00 OIL SEAL (SD 12-22-5 HS)
#5TA-15462-00-00 GASKET, CRANKCASE COVER 3
I started by draining the coolant and taking off the header pipe
Then removed the side case.
Here is a photo of the outer water seal and impeller with the shaft already removed. The shaft just pulled out and the inner oil seal hammers out with a punch along with the bearing. The water seal popped out easy
Here is a photo of the bearing with shaft still in.
Here are the groves that everyone keeps talking about wearing into the shaft. The old one is on the left and the new one is on the right(It will be obvious)
Another of the inside of the case
Hope it helps.
I would like for someone to take a poll of what the temperature was when the pump started leaking.
Mine would only leak from about 40 degrees and below. Anything above that and it was fine.
Posted January 26, 2006 - 09:22 AM
I will have a look at those pictures this weekend.
It is sounding like the cold weather can contribute to and/or create the problem.
I was planning on seeing what happens in the spring when the temperatures will be warmer and hoping to see the problem disappear. But it sounds like I should address it anyway.
Posted January 27, 2006 - 04:49 AM
Posted January 27, 2006 - 12:01 PM
The previous owner went so far as to have a dealer check the shaft for grooves and it passed inspection, so he just replaced the seals. Perhaps they aren't installed properly.
Hearing that the cold weather can contribute to the issue will help me to resist the temptation of firing it up once a week and sitting on it in the garage (too icy to take out).
I will see what happens in the spring with the warmer weather and make a point of doing the seals and shaft once per season as part of my routine prep.
Posted January 27, 2006 - 03:11 PM
cold weather does have its affect, but not to the poit, that new seals would leak
there are few possibilities, like: incorrectly installed seals, damaged new seals, worn impeller, bad bearing
What is "incorrectly installed" is it spring side towards the pressure or spring side away from pressure?