Author Topic: 1986 Water Pump Q's  (Read 429 times)

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Offline Bostonclassics

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1986 Water Pump Q's
« on: July 24, 2019, 04:14:53 pm »
Should there be 1/4 inch play with the water pump (moving by hand left to right)?  I need to know if this is normal. 

My goal was to replace the water pump oil seal, as I'm getting oil in my anti freeze and hope that's the culprit.  The Concours has 10K miles and sat for a long time before I bought it.  Thankfully the oil is clean and no anti freeze in the oil. 

thanks

Offline DC Concours

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Re: 1986 Water Pump Q's
« Reply #1 on: July 24, 2019, 04:48:37 pm »
The impeller shaft? It should not have any play in any direction.

Is there weeping?

Offline Victor Salisbury

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Re: 1986 Water Pump Q's
« Reply #2 on: July 24, 2019, 05:03:13 pm »
There should not be that much free play. There are two seals ( IIRC ), the oil seal between the pump and the engine. Another on the coolant side between the impeller and the pump cavity. That seal is a labyrinth like seal? Not serviceable. If the oil is migrating into the coolant, then I suspect that seal is done, might as well replace the whole pump. 
Over the years and my two C10's I tried replacing the oil seal twice, using the guidance/tips from the lawnmower mechanic and others. One lasted a month, the other was unsuccessful from the get go. As a Jet Engine mechanic by trade, feel pretty confident in my mx skills, so i twasn't worth the effort just doing the seal,,,,,for me. Going forward I just bit the bullet and got the WP kit from Murph, changed 3 altogether, they seemed to last around 80k for my Connie's.

HTH

YMMV
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Offline Bostonclassics

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Re: 1986 Water Pump Q's
« Reply #3 on: July 24, 2019, 05:22:04 pm »
Thanks for the input.  Wasn't sure what 'Murph' was (a Kaw dealer?) or ?

Offline Victor Salisbury

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Re: 1986 Water Pump Q's
« Reply #4 on: July 24, 2019, 05:41:10 pm »
 :)   Oh, apologies on the assumption. One of the stellar Connie vendors out there: 

Murph's Kits Online Store
https://www.murphskits.com/
Vic Salisbury
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Stupid Hurts! Wearing protective gear is much more comfortable.

Offline Bostonclassics

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Re: 1986 Water Pump Q's
« Reply #5 on: July 24, 2019, 06:29:13 pm »
I just reached out to Murphs and many thanks.  I will replace all the hoses as another member stated.  I love this model bike, 1986. 
Take care

Offline Bostonclassics

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Re: 1986 Water Pump Q's
« Reply #6 on: July 27, 2019, 12:50:13 am »
Hello all - do I need a puller (tool) to remove the water pump housing or is it just maximum muscle?

Offline Bud

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Re: 1986 Water Pump Q's
« Reply #7 on: July 27, 2019, 10:36:22 am »
It's been a few years since I replaced mine.  No puller used.
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Offline WillyP

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Offline Bostonclassics

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Re: 1986 Water Pump Q's
« Reply #9 on: August 03, 2019, 12:17:06 pm »
One more hurtle still....

I feel like a puller tool is needed to pull the pump off.  I ensured the bottom pipe is disconnected.  I don't want to use a rubber hammer and tap it without hearing from the COG 1st.

thanks

Offline Bostonclassics

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Re: 1986 Water Pump Q's
« Reply #10 on: August 03, 2019, 12:22:17 pm »
Water pump on my bike that won't come off

Offline DC Concours

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Re: 1986 Water Pump Q's
« Reply #11 on: August 03, 2019, 01:06:14 pm »
Wow that's a bad pump and they must have been using bad coolant or just water.


Anyway , what you did is just remove the cover. Get the main bolts off. The whole thing will come off easily.

Offline connie_rider

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Re: 1986 Water Pump Q's
« Reply #12 on: August 03, 2019, 02:22:59 pm »
Bostonclassics, is there any oil/coolant leaking from the weep hole behind the pump?
                       is the slack you mentioned side to side or in and out? {at the impeller}

I've seen images of impellers that are almost completely eroded away by corrosion.
Yours does not look all that bad to me. May be repairable with bearing and seals..

I have never had to change a water pump on nay of my C-10's so I cant advise you on removal. But I suspect you still have a bolt somewhere that is holding it in place.

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Offline DC Concours

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Re: 1986 Water Pump Q's
« Reply #13 on: August 03, 2019, 03:57:54 pm »
Once all the bolts are out. Remove the top cover as you have done, disconnect the lower hose and grab the pump and wiggle it off.  It may be a little stuck.

Offline Bostonclassics

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Re: 1986 Water Pump Q's
« Reply #14 on: August 29, 2019, 04:52:47 pm »
Trick to remove stuck water pump is to put a flat edge screw driver on the pump housing and tap with a rubber hammer in both directions and within a minute it freed up to be pulled out.  The infamous coolant pump inner oil gasket was loose yet not too badly worn.  I assume that was the cause of the anti-freeze looking brown.  Again there was no coolant in the oil, of which I drained out during this water pump removal operation.

The small bolt that tightens the inner coolant pipe to the pump housing is a difficult bolt not to strip and quite small. 

I never did understand how a zip tie would (stay attached) over time to the coolant pipes (to prevent the outer pipe touching the exhaust pipe.  That's the only remaining mystery.  Seems Kawasaki should have designed a better solution.

For now, it's reassembled after a maiden trip around town to ensure the bike stays at the right temp. 

Thanks to COG members for their help.