GL1100 water pump rebuild


Information and questions on GL1100 Goldwings (1980-1983)
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virgilmobile
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GL1100 water pump rebuild

Postby virgilmobile » Tue Nov 23, 2010 4:26 pm



I did rebuild a pump once.i found the bearings at the the local bearing shop.they cost me $20 each.be careful removing the impeller shaft.it will distort the mechanical seal housing.I found the number for the bearing on the bearing seal.It was a ntk number or such.Try to rebuild it if you have to replace it anyway.And no there should not be any side play,There are 2 roller bearings a 1/2 inch apart.They are not oil lubricated and will dry up.Careful about the "O" ring.It can be damaged on install.Grease it.Check the weep hole while you're there.



thomascomcast
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1983 gl1100

Re: GL1100 water pump rebuild

Postby thomascomcast » Tue Nov 23, 2010 4:36 pm

I found this post on the web - step by step rebuilding a water pump for an 1100 or 1000. I'll research parts. What do you think?
http://www.classicwingclub.org/gallery/finn/rebuild.htm

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virgilmobile
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Re: GL1100 water pump rebuild

Postby virgilmobile » Tue Nov 23, 2010 6:40 pm

The step by step is good,but be aware that I have seen two different pumps used.One has a composite impeller and the other one a steel impeller.they use different size bearings.The composite impeller will crack under pressure(or dropping...I screwed that one up).The different pumps come from different years but are interchangeable i believe.There not difficult to rebuild,just getting them apart can be tough.

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WingAdmin
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Re: GL1100 water pump rebuild

Postby WingAdmin » Tue Nov 23, 2010 9:54 pm

The plastic impellers are original equipment (see left side of picture):

Image

At some point, Honda realized that putting plastic impellers inside hot fluid for long periods of time wasn't such a great idea in terms of longevity, so they switched them to a steel impeller:

Image

I don't believe any steel ones were ever originally installed in the bikes, but if you purchase a replacement water pump from Honda, the steel version is what you will now get.

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virgilmobile
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Re: GL1100 water pump rebuild

Postby virgilmobile » Tue Nov 23, 2010 10:33 pm

The composite impeller one I pulled from a 83 gl1100 i,the steel one came out of a 81 standard.After who knows how many owners and near 30 years I couldn't guess which,what or where,Just that they bolth fit and do have different bearings.

thomascomcast
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1983 gl1100

Re: GL1100 water pump rebuild

Postby thomascomcast » Wed Nov 24, 2010 9:33 am

The impellers on the two pumps I have are plastic but seem to be OK but I will examine them again. I'm going to shop for bearings this morning. From what I was told from one bearing place the bearings are common and less than $15 each. If its that cheap I will give a rebuild a try and see what happens. I have a spare 81 1100i I would motor I would like to stop stealing parts from and fix up and sell. It has good compression. Do you have a trick, or any special curse words, to get that little retaing clip off the shaft of the pump?

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WingAdmin
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Re: GL1100 water pump rebuild

Postby WingAdmin » Wed Nov 24, 2010 11:22 am

virgilmobile wrote:The composite impeller one I pulled from a 83 gl1100 i,the steel one came out of a 81 standard.After who knows how many owners and near 30 years I couldn't guess which,what or where,Just that they bolth fit and do have different bearings.


If your 81 standard had a steel impeller, then it is not the original pump. :)

thomascomcast
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Re: GL1100 water pump rebuild

Postby thomascomcast » Wed Nov 24, 2010 11:32 am

Its plastic and the impeller wobbles. I found the bearings for the pump for $11 each but the seal is $39 from Honda only and that makes it not worth the time to rebuild. I bought new from Zanotti Motor for $114. I may try to rebuild my spare just to see if I can do it. Cant hurt it, its already defective.

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virgilmobile
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83 GL1100 standard
84 GL 1200 I

Re: GL1100 water pump rebuild

Postby virgilmobile » Wed Nov 24, 2010 11:40 am

At least it shows someone was trying to keep it fixed up.Removing the retainer clip:I clamped the housing(be verrrry careful about the impeller),I used a "C"clip removal tool(harbor freight $8)opened the clip just a little,small blade to walk it out of the ring.Hard part was tapping the shaft out.Impeller bearing is behind the mechanical seal.I tapped both out at the same time(thus distorting the seal case).After I replaced the bearings and seal,I supported the shaft and pressed it back through the bearings(not much effort)with the "C" clip back on it was finished....then I knocked it off the bench..cracked the impeller..sooo i grabbed a spare steel one to rebuilt it.That's when I found that the bearings were different size.

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WingAdmin
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Re: GL1100 water pump rebuild

Postby WingAdmin » Wed Nov 24, 2010 1:22 pm

I have my old (failed) plastic impeller one still as well...just in case I want to do something with it one day.

thomascomcast
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1983 gl1100

Re: GL1100 water pump rebuild

Postby thomascomcast » Wed Nov 24, 2010 1:32 pm

I broke a fishing reel once by placing it carefully on my workbench and then watching it roll on to the concrete floor. I have a lot of spare parts now. That was right after i told my young son years ago as he got out of the car 'don't slam the....." Then my 6 foot new rod was 5'5" .

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RBGERSON
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had every year from 75 to 83

Re: GL1100 water pump rebuild

Postby RBGERSON » Thu Nov 25, 2010 8:04 am

There is a guy in Holland who sells a rebuild kit for these pumps the whole thing is $25 plus shipping I think $10 bearings and the mechanical seal..If yo want it I have his email..and he posts on the ngw site
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

thomascomcast
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1983 gl1100

Re: GL1100 water pump rebuild

Postby thomascomcast » Thu Nov 25, 2010 9:56 am

Send me his email. I can hardly wait to see what shipping is.

PRACTIKALGUY
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Re: GL1100 water pump rebuild

Postby PRACTIKALGUY » Wed Nov 20, 2013 1:13 pm

Am I correct that if you buy a brand new water pump, it will come with the mechanical seal?

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virgilmobile
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: GL1100 water pump rebuild

Postby virgilmobile » Wed Nov 20, 2013 1:35 pm

To my knowlege a "new" one comes complete ready to install....impeller,ceramic seal,new bearings...
They may not include the "O" ring however.....The "O" rings can cause problems...I've damaged one during a hurried install....Proper alignment and a bit of lube took care of that...

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WingAdmin
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Re: GL1100 water pump rebuild

Postby WingAdmin » Thu Nov 21, 2013 8:54 am

virgilmobile wrote:To my knowlege a "new" one comes complete ready to install....impeller,ceramic seal,new bearings...
They may not include the "O" ring however.....The "O" rings can cause problems...I've damaged one during a hurried install....Proper alignment and a bit of lube took care of that...


Correct, the water pumps come ready to install, no seals to install or anything. The O rings come separately as part of a water pump gasket kit:

http://cyclemax.com/inc/sdetail/29809/158216





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