Author Topic: Water pump seal  (Read 616 times)


  • Jr. Member
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Water pump seal
« on: August 26, 2017, 02:41:21 PM »
I'm trying to rescue a 3xv RS and i can't get the water pump seal out.
I tried a punch in the hole after removing the gearbox but it punched through the seal rather than pushing the seal out.
Now I'm stuck, I've tried heat and it just won't budge.
Any tricks to this?
P.S pump was removed from bike when I got it as gearbox oil had become milky so previous owner started to strip then gave up.


  • Hero Member
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  • Location: NZ
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Re: Water pump seal
« Reply #1 on: August 26, 2017, 05:01:20 PM »
Yeah they can be quite stuck in there. I just used a really big flat  screw driver and wedged it out. Not very professional but it came put with relative ease.. ;D (-P)


  • Sr. Member
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  • Location: Ireland
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  • Kildare, Ireland
Re: Water pump seal
« Reply #2 on: August 26, 2017, 08:28:42 PM »
Mine was the same . Had to gouge it out 😂.


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Re: Water pump seal
« Reply #3 on: September 16, 2017, 02:38:08 PM »
Ok, seal is out and new one in, box all back in and clutch side rebuilt.
Problem is I've just gone to screw impeller blade on shaft and it screws up tight against case rather than locking on shaft.
It's as though the shaft isn't through the case enough.
Looking like I'll have to take the clutch and cover off again and pull the box but it deffinitely went back in as it came out.
P.S. water pump was already off bike when I got it.


  • Sr. Member
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  • Location: Southern Indiana, USA
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Re: Water pump seal
« Reply #4 on: February 02, 2018, 09:02:55 PM »
I spent the summer rebuilding a 1986 RM80 Suzuki Motocrosser. I had several VERY frozen seals.

- First lay the case down so the seal is facing up. Apply a miracle penetrating oil called "Kroil". Let is sit for at least 12 hours.
- Drill 2 small hole 180 degrees apart just behind the seal's inner lip.
- Screw in drywall screws in to the holes. Be sure they are bigger OD than the drill holes, but almost larger than the inner cavity between the seal's inner and outer lips.
- Using Vise grips...carefully work the seals within the races, back and forth. Once they start to give way pull up, slightly, then switch the vice grips to the other dry wall screw and repeat.
- Continue until the seal is free.
- Do not try to force the seal out with screwdrivers, etc. It will bugger the seals race and guarantee future leaks.
Brief, fleeting Glory. Which of itself cannot last, but while it does is the greatest game of all.


  • Sr. Member
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  • Location: Seattle
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Re: Water pump seal
« Reply #5 on: February 02, 2018, 09:55:54 PM »
Was there a washer between the impeller and shaft? Like a thin flat washer.

That seal tip is a good one I've used it before works great.