K11 Owners Group

Milton · Posted: Wed Jun 25, 2014 9:35 am Post subject: Good or Bad Oil/Water Pump Shaft?

Could someone with more experience than I with these shafts take a look at my pictures and tell me if I need the shaft replaced. To me it looks OK where the seals are bearing but I don't know for sure. From the IBMWR site (http://www.ibmwr.org/ktech/water-oil-pump-rebuild.shtml) their pictures look every bit as bad as mine but they are saying the shaft is still good Question

. If I can help it I would prefer not to spend $204 for a new shaft, but I would also prefer not to have to tear it apart again in a couple of thousand miles by being a cheap SOB.

Oh, and the bike is a 1996 K1100RS ~62,000 miles.

Thanks for any and all advice,

Milton S.

Rotated 180 degrees from the above photo.

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Jethro Tull: Thick as a Brick!

1992 K100RS 48K. Dead for now.
1998 Triumph Tiger 43K->56K. Doin it in the dirt.
1978 Honda CB400T 32.5K. For my boys.

Number 6 · Posted: Wed Jun 25, 2014 11:18 am Post subject:

Yes you do, way overdue...
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I am not a number, I am a free man.

94 K1100LT

whyoldbill · Posted: Wed Jun 25, 2014 1:46 pm Post subject:

Being a fellow "cheap SOB", judging by that write up, I'd re-use that shaft. That pitted area is described as the "air space" by the author of that writeup.
That said, you do run the risk of getting to tear it apart again, whereas a new shaft would definitely eliminate that risk.
It's a gamble if you reuse it.
Feeling lucky??
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'02 - GL1800

The desired effect is what you get when you improve your interplanetary funksmanship - George Clinton

Scott_Anderson · Posted: Wed Jun 25, 2014 5:48 pm Post subject:

+1 vote to replace it.
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Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

hfxrzw · Mad Brick Rider Joined: 30 Jan 2009 Posts: 78

The important location is where the oil seal rides the shaft. If that is smooth and not worn down you should be OK. The water seal doesn't run on the shaft, it runs on a ring in the seal. The shaft part seals on the shaft, but is stationary (moves with the shaft) so is easy to keep tight.
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Cheers, Rene

Greetings from Florida.

BMW K100 '85

bobdcamp · Posted: Wed Jul 09, 2014 2:01 pm Post subject: Oil/water shaft

I just had to replace the shaft on my 94 K/RS. It looks just like yours.
It did take over a week to get the oil out of the cooling system. Remember this.... There is NO cheep way to fix a K bike, So my vote is to fix it right the first time.

Be safe