04 450 leaking coolant?

3 replies to this topic
  • RoostNu

Posted October 21, 2004 - 09:56 AM


i have an 04 450 and it just started leaking out of the wheep hole on the water pump cover? is this a big deal to fix?

  • Ga426owner

Posted October 21, 2004 - 10:10 AM


replace seal and shaft.

no big deal

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • RoostNu

Posted October 21, 2004 - 11:07 AM


i talked to a local dealer and they said tht thereis just an$3 "O" ring to replace is that it you think the shaft is necessary too? thanks for the info :cry:

  • grayracer513

Posted October 21, 2004 - 11:14 AM


It's a seal, not an O ring, and there is one to keep coolant in the water pump, another to keep oil in the engine. The seal usually wears a groove in the shaft that ends up preventing th enew seal from seating on it properly, so it often needs to be replaced as well.

To replace it, you will need to remove the right side engine cover, disassemble the w/pump drive gear and impeller from the shaft, and replace the two seals. Not really very tough work at all.

You should have a manual to provide you with the unfamiliar details, though. Get one if you don't.

Related Content


Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.