HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
twobigredneck

water pump 04 wr450

5 posts in this topic

You may have an impeller shaft that has a significant groove worn in it from the previous coolant seal.  This causes the lip of the new seal to get "stuck in a rut", so to speak, and be unable to seal well.

 

Another possibility is that you installed the seals backward (see the picture below)

 

A third possibility is that your balancer shaft bearing on the water pump side is shot: http://www.thumpertalk.com/topic/691433-repeat-failures-of-water-pump-seals/

If this is the case, the bearing cannot be replaced with removing the engine and splitting the cases, because on the older models (pre-'07), the retainers were on the interior side. 

 

SealsLabeledsm.jpg

Share this post


Link to post
Share on other sites

I just did this fix. I used a water pump rebuild kit and replaced bearing and both seals. If you follow this thread they realize the book is off and can cause confusion.

http://www.thumpertalk.com/topic/884253-wr450f-water-pump-leak/

Double check your seals as mentioned. After I put it together I was still nervous I didn't get it right, but no more leaks. So I'm good. If I did it again I would take pictures of both seals, just for reference and your not second guessing yourself.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0