Water pump seal on '87 K75S

[Jeff488]

I tried searching for an answer, but it didn't answer my question.
 In rebuilding the oil/water pump, I have it together but notice that the shaft through the water seal is a tight fit and when the shaft is turned, the inner portion of the seal turns. It looks like the whole inner half of the seal turns. The shaft alone doesn't turn inside the seal.
 It also doesn't turn freely, but is quite stiff.
 Is this normal, or have I screwed it up?
 
 The oil pump gear is flush with the housing and the impeller bolts up easily.
 
 Thanks in advance.

[Laitch]

Did you use a cast impeller or a stamped steel impeller. Did you use a new pump shaft? Which instructions were you using?

[Jeff488]

New stamped impeller. Used the same pump shaft. Cleaned the corrosion off it some to smooth it.
Pulled the shaft through the seal with a socket and longer boit. Seated the seal with a pvc pipe home made tool.


If I have read and understood correctly, this seal has a stationary outside part and a turning inside portion. Is that right?


It just turns harder than any shaft in a seal that I ever worked with.

[Laitch]

It shouldn't be hard to turn. Did you add a spacer bushing to the assembly?

[Jeff488]

Yup.
There was a new spacer with the new impeller, and it was used because the directions said the old one was the wrong size.
I have not yet torqued the bolt holding the impeller on.
It's not like it is seized, but when I turn it by the impeller, it seems stiff and I can hear a rubbing noise that seems to come from the seal. The impeller doesn't appear to be contacting the housing, but it's close to it.

I'd rather buy new seals and reinstall them than go through the hassle of reassembly just hear it howl and leak. :bang-head:

[Jeff488]

Got the new seals and put together correctly this time.

Bike will not start!!! My buddy rode it to my shop, so it's a bit embarrassing.
Starter turns it over nicely. Not a peep, pop or sputter.

=Pulled all three plugs and they show a fat, blue spark. Got a free defibrillation as an extra feature. :yow
=Pulled the injectors and they are spraying.
=The camshaft is opening the valves, so the cam chain is still turning the camshaft.
=Sprayed flammable stuff in the intake and may have gotten a few pops, but no start.
=Checked the huge brain plug and it looks OK.
=Disconnected battery to let all the electrons in the brain settle to the bottom.
= Fuel pump is working. I didn't realize that on these K bikes it doesn't run until the starter is activated. That may not be how it's supposed    to work. I dunno, not being a K bike expert.
=Plugs are wet after attempted starts. Thought it may be flooded, so blew out the cylinders with compressed air.
=Drained tank and put new gas in. Even purged the fuel pump.

I may have done some other stuff. Can't remember now, and the above wasn't necessarily done in the order listed. I've been messing with it since Saturday.

I am not 100% sure the plug wires are to the correct plugs(I didn't remove them) and the Clymer book is no help. I think the cylinders are numbered front to back and the coils are installed in line, rear to front according to the firing order(3=1=2), but I'm not sure.
So, if someone could tell me which coils are supposed to fire which cylinders, that possible issue can be eliminated.

Tomorrow the 4 pin plug under the tank will get checked and cleaned.
After that, I'm out of ideas. :bang-head:
We're open to suggestions. Please, my reputation is at stake here.
Thanks in advance,
Jeff

[Jeff488]

Couldn't wait. Went up and checked and cleaned the 4 pin connector.
No start.

[Jeff488]

Found a source for the plug wire positions.
Front coil to front plug and so on to the rear coil.
So, as Gilda Radner used to say, "Never mind.".

It lives!! :yippee:

[Laitch]

Found a source for the plug wire positions.
Front coil to front plug and so on to the rear coil.
So, as Gilda Radner used to say, "Never mind.".

It lives!! :yippee:

Not so fast there, Jeff. If it was ridden to your shop and all you did was work on the pump, how did the misplaced plug connections get in the picture?

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[Jeff488]

Not so fast there, Jeff. If it was ridden to your shop and all you did was work on the pump, how did the misplaced plug connections get in the picture?

Good question.
Because the oil pump was empty and the bike had not run for about 3 weeks, I wanted to crank it without the spark plugs installed until oil had filled the pump and was circulating. The owner pulled the plug wires, as he was helping me. He will certainly get a larger ration of crap over this than I have gotten from A.T.


In the owner's defense, he is not a mechanically inclined guy, just a good friend.

[Laitch]

All's well that ends well, Jeff. Another mystery has been solved.