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Cooling Systems Cooling Systems - Radiators, Water Pumps, Fans, Coolant, etc.

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February 27th, 2019, 04:28 PM   #11
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From: Yorba Linda, CA

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I Ride: 09 FE 450, KTM 380/Lectron & Rad Valve
Originally Posted by Mel N View Post
I have this leak for a couple of years. It was just a little messy so I was letting it go. It’s getting bad so I have to fix it. I have put in a new OEM bearing and o-ring on the shaft. Leaks. Tried slightly larger o-ring with silicon on it and leaks. Each time I take it apart the o-ring has been cut all the way around. I believe this is my problem but apparently i can’t get the case on without cutting the seal. Any suggestions?
I replaced the bearing and water pump seal a couple years on my FE450 as mine began leaking too. I'm not sure how you are cutting the seal when putting it back together but I recommend sticking with the OEM water pump seal. Unless there is something else going on.

It was discovered years ago the seal was installed backwards at the factory and called out in the repair manuals to again install the seal backwards.

09 570 wtaer pump seal.

I installed the water pump seal with the spring towards the coolant as discussed in the above post. So, along with doing the weep hole mod and installing the seal the correct way, it no longer leaks.

Last edited by pjk380; February 27th, 2019 at 04:58 PM.
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February 27th, 2019, 07:10 PM   #12
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I Ride: 2014 KTM 300 XC, 2014 KTM 250 XC, 2007 Husaberg FE450, 1999 RM125
I think Taffy sells a kit.
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