Water pump seal removal

YucTown44 · Posted: Tue Mar 27, 2012 2:22 pm Post subject: Water pump seal removal

How do I take out the water pump seal on my 04 CRF450R?

lightflight · Posted: Tue Mar 27, 2012 2:28 pm Post subject:

Here is a how to with pics.

http://crfsonly.com/howto/450r/water-pump/honda-crf450r-water-pump-rebuild.php

lightflight · Posted: Tue Mar 27, 2012 2:31 pm Post subject:

Also water pump rebuild kit if needed.

http://www.crfsonly.com/catalog/product_info.php/products_id/3651

If you are just replacing the seals and find that the shaft is worn make sure you replace it otherwise you will need new seals again soon.

YucTown44 · Posted: Tue Mar 27, 2012 2:41 pm Post subject:

Alright thanks! It was just rebuilt a yr ago, but it seems to be overheating more and more frequently. Mostly on rides where we're doing slow climbing stuff with rhinos

YucTown44 · Posted: Tue Mar 27, 2012 3:00 pm Post subject:

I just let it run til it overheat... Nothing came out of the weep hole. So the seals are good right? What does this mean?

Back2-2 · Joined: 04 Jan 2011 Posts: 301 Location: Arizona

If you are not getting wetness out of the weep hole the ceramic disc / seal is good. If your radiator fluid is not going down and trans fluid going up the inner oil seal is good.
It sounds like you are not getting enough air flow to keep cool due to the slower speeds.
My riding Buddy talks highly of the water wetter type products. Don't remember which one he uses ?
He swears it's the real-deal - Might give that a try.

YucTown44 · Posted: Tue Mar 27, 2012 7:02 pm Post subject:

RLPII · Posted: Tue Mar 27, 2012 7:43 pm Post subject:

YucTown44 · Posted: Wed Mar 28, 2012 9:33 am Post subject:

Ya used to use engine ice, but when I had my water pump rebuilt the guy put maxima coolanol in it. I just talked to my buddies mechanic and he suggested ziptie because thats what they use in their race bikes. As well as switching to a 1.88 rad cap.

fbr · Posted: Sat Dec 15, 2012 5:51 pm Post subject:

After removing the seal on the impeller side, I can see that the bore between the two seals is not concentric. There is a longer radius near the weep hole giving the bore a shape like a cam lobe on a cam shaft. Is this machined OEM or wear and tear?[/img]

Back2-2 · Joined: 04 Jan 2011 Posts: 301 Location: Arizona

If I understand you correctly - you are describing the hole in the case remaining after the seals & pump shaft have been removed from the side case. That is just the OEM hole for the shaft to go through. The seals take care of centering the shaft and the hole in the case is a backing / shelf for the inner seal surface to seat on.
It is a cast aluminum part, the hole is not required to be perfect. the shaft does not touch any of the surface of hte hole. I would not think it would be grossly out of round ? The inner seats where the seal rides should apear to be milled nice and flat.

Hope that helps ?