changing the water pump seal

[billybowlegs]

Anyone have any tricks to changing water pump and oil pump seals. My bike is an 04 CRF 450. Any info would be appreciated.

[Michael Parker]

pry the od one out with a hooked screwdriver and put the new one in by putting a socket about the same size on it and hammer it in slowly

[Mainjet2001]

Originally Posted by billybowlegs

Anyone have any tricks to changing water pump and oil pump seals. My bike is an 04 CRF 450. Any info would be appreciated.

What does your manual say?

[Woody_393]

I have no idea about the oil pump seal, but the water pump seal is pretty easy.

You'll need a new right side engine cover seal, and the inner and outter seals, plus I would also tell you to get a new shaft since the shaft sometimes gets a grove worn in it.

I would suggest either drilling a hole in your impeller as well or buying an '05 impeller.

See this thread for info on this mod. --> Drilled Water Pump Impeller

It's a pretty easy job. But it does take some time.

[billybowlegs]

the theory behind drilling a hole is an interesting one. The problem I am having currently is getting the bearing out without doing damage.

[Woody_393]

hmmm, I can't remember if I even removed mine... I think I did, and it came out pretty easy. Just used a socket from the back side and gave it a little tap and out she came.

I don't recall any of it being difficult to remove, only time consuming.