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
bigblockchevelle

03 wr 450 water pump

8 posts in this topic

Hey guys, the last few times I have started my bike cold, I get some drops of coolant from under the water pump area. This morning, there was many drops but it is like it stops when it gets warm. I thought i had a seal leaking but I got underneath it and can see it is coming from a weep hole in the pump housing? Has anyone else experienced this. It looks like it is part of that whole side cover assembly?

Share this post


Link to post
Share on other sites

I had the same problem with my 2003 WR450. It will get worse over time, especially when the weather gets colder. There are a couple of weep seals that you will need to replace on the waterpump impeller shaft. I had the seals replaced at the same time as I had the valves adjusted at a local Yamaha service dealership. Total price was $180 for valve adjustment, seal replacements, and an oil/filter change. You can probably do it yourself really cheap, the majority of the bill was labor.

If you decide to do it yourself, I can dig up my service repair receipt for part #'s. I am from Michigan as well.

Share this post


Link to post
Share on other sites

Dealer informed me that i need to remove the entire clutch cover to install the new seal which sounds like it is the same one you had replaced. still debating on doing it myself as it is do for an oil change anyway! thanks for the reply. Where in Michigan are you?

Share this post


Link to post
Share on other sites

it's really easy to do it yourself. Just grab your manual and check out this post by TARFELE

http://www.thumpertalk.com/forum/showthread.php?t=314628&parentpage=2&highlight=water+pump

I did it in about 90 minutes. The part numbers are even in this post.

Use the search function to find more info. A lot of people have done this one. you have to take off the clutch cover, case cover, oil filter cover, water pump cover, and exhaust pipe.

anyone can do it :thumbsup:

Share this post


Link to post
Share on other sites

I see there is some confusion on which way the seals face. What do you guys recommend. I didnt find anything that specified in the manual. thanks again guys

Share this post


Link to post
Share on other sites

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

at least, that's what i understand. someone please correct me if i'm wrong.

Share this post


Link to post
Share on other sites
the oil seal has the hollow side facing the engine, and the water seal will have the hollow side facing away from the engine.

at least, that's what i understand. someone please correct me if i'm wrong.

That is correct. The hollow side always faces the fluid side. Therefore the weep hole should be dry if the seals are both good. :thumbsup:

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