HELP: How to remove water impeller

Hi!

Have a strange problem, the coolant reservoir is always empty, seems like the coolant flows through the oil seal behind the water impeller. The strange part is that almost no coolant flows out here when the reservoir is empty.. The waterlevel in the radiator is decreasing but i can ride 400km without the waterlevel getting to low in the radiator..

So I figured maybe I should try to replace the oil seal behind the waterimpeller.. So I removed the waterpump housing and it seems to me, from what I can read in the ownersmanual, that I have to hold the impellershaft.. Meaning i have to do a lot more disasembling.. :thumbsup:

So my question is: Is there a problem with just putting the engine in 1stgear and and screw the impeller of without holding the impellershaft? And second, wich way to screw?

You will break the impellar shaft if you dont take the right side engine cover off and use a 12mm wrench on the flats provided on the opposite end of the impellar shaft while you use a socket to turn the impellar nut counterclockwise! :thumbsup:

I just had the exact same problem. I had faulty oil and water seals at the impeller because they were installed backwards. Here's the parts you'll need:

#5GR-12458-00-00 SHAFT, IMPELLER

#93109-11073-00 OIL SEAL (water side seal)

#93102-12321-00 OIL SEAL (SD 12-22-5 HS) 93102-12106-00 OIL SEAL

#5TA-15462-00-00 GASKET, CRANKCASE COVER 3

#93306-00105-00 Impellor Shaft Bearing

The oil seal will have the hollow side facing the engine, and the water seal will have the hollow side facing away from the engine.

You might not have to replace the bearing and shaft, but I'd replace the shaft while you have it apart.

Search under "coolant leak" here in the forum.

Good luck. It's pretty easy, but takes a couple of hours.

oh yeah.....

and you'll have to take the right side cover off to get the impeller shaft off. it's easy with a 12mm wrench on the flat spots on the shaft. it's easy and safe.

On http://www.yamaha-motor.com/sport/parts/home.aspx, for my bike (2004 Wr 450) it brings up the 12106 oil seal?

But on the sticky on this forum it says the 12321 seal.

which one do i need to buy please?

Cheers

I just had the exact same problem. I had faulty oil and water seals at the impeller because they were installed backwards. Here's the parts you'll need:

#5GR-12458-00-00 SHAFT, IMPELLER

#93109-11073-00 OIL SEAL (water side seal)

#93102-12321-00 OIL SEAL (SD 12-22-5 HS) 93102-12106-00 OIL SEAL

#5TA-15462-00-00 GASKET, CRANKCASE COVER 3

#93306-00105-00 Impellor Shaft Bearing

The oil seal will have the hollow side facing the engine, and the water seal will have the hollow side facing away from the engine.

You might not have to replace the bearing and shaft, but I'd replace the shaft while you have it apart.

Search under "coolant leak" here in the forum.

Good luck. It's pretty easy, but takes a couple of hours.

93102-12321-00 appears to have superseded the 12106.

Ok, thank's.

I just took my water pump cover off and ran into the same problem. I thought....I'll go see if I can find the directions on thumper talk. And what do ya know...right here it was.

great info.

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