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Water pump parts
I use my local Honda dealer for parts, It might be different in the US but by the time were nailed for shipping and customs clearance it's usually the best.

When you replace the cover make sure the neutral switch is in the correct position

Replace ALL O rings, I use crisco to make sure they stay in place.

I use grease on the gaskets both sides, I dont get any oil leaks.

When replacing the two collars open them up a little with an exacto blade this will insure a snug fit on assyembly

Use new crush washers when installing the pump and lube the two O rings on the pump liberally to ensure they dont pinch.

pump 1 of 19200-MG9-681
washer 3 " 90443-397-000 6mm should be able to get them at an auto parts place
O ring 1 " 91303-283-000 37.2 x 2.3 mm
O ring 1 " 91356-706-000 56 x 2.4 mm
Gasket 1 391-MG9-000 front cover
O ring 2 91312-371-003 23 X 2.1 MM
O ring 2 91333-567-010 17 x 2.5 mm
O ring 1 91345-580-000 29 x 2.2 mm
Gasket 1 11391-MG9-306 replaces 11391-MG9-000

Added by wingman 71

O-ring 91305-KT7-003 replaces 91303-283-000

O-ring 91333-KE5-003 replaces 91333-567-010

The missing gasket is the water pump gasket, part number 11396-371-306, that goes under the water pump cover! Can’t do the job without it.

Also, while you’re at it you might as well replace the o-ring under the water pump gooseneck cap. O-ring part number 91305-426-003.
The only stupid questions are the one's that are not asked.

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#1 06-05-2009, 09:48 AM,
I updated the parts list:

11391-MG9-306 it replaces the older part number
The only stupid questions are the one's that are not asked.

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#2 06-06-2009, 05:30 AM,
bob NE In. Wrote:Is water pump art anything like a Spirograph??


Happy now bob Smile
The only stupid questions are the one's that are not asked.

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#3 06-06-2009, 07:02 PM,
captain steve Wrote:Hi guys,
I'm fairly new to the site but not new to GL1200s. I recently purchased an SE-i and have had several annoying problems. The latest was an oil leak around the front engine cover. Well to make a long story short, I have replaced the gaskets and O-rings and have reassembled the cover and have discoverd a new oil dripping problem coming from the water pump weep hole. I'm not sure what's causing this when the pump is pretty well sealed inside the housing. I guess the front cover comes off again.


Attached Files
.jpeg   leaking waterpump.jpeg (Size: 79.58 KB / Downloads: 1,111)
The only stupid questions are the one's that are not asked.

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#4 06-06-2009, 07:04 PM,
I have a question. the stock impellers were plastic is that correct? Mine is metal so it may have been changed also i can turn the impeller a little not up and down but like its on a spline or something. No leaks or anything gust ckecking the radiator and reached in to check the impeller. thanks.
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#5 03-14-2010, 05:31 AM,
They changed from the plastic to steel impeller in 85

You will get a small back and forth rotation but it sounds like your bearings are OK.
The only stupid questions are the one's that are not asked.

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#6 03-14-2010, 05:45 AM,
One more question for tricky. since i have the radiator and block drained and blew out couple weeks of drying should i go the Evans coolant thing. My radiator guy says its clean and to keep doing what ever it is i do to keep it that way. I have never boiled it over but when the fan comes on it will not cycle off until i ride a little ways. I cant say what the gage says because i just replaced the sending unit. thanks for all the insites and tips i dont know what i would do without this site.
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#7 03-24-2010, 04:36 PM,
In my opinion, if your not having any problems I would stick with the regular coolant.
I use Honda type 2 premix

Sitting in the garage, my Aspy fan cycles on and off when the temperature calls for fan.

If it is cycling on and off then that is normal
The only stupid questions are the one's that are not asked.

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#8 03-24-2010, 05:37 PM,
My 86 Aspy once the fan comes on does not cycle off. I have let it run for 5 minutes or so with the fan on no cycling but no over heat. I will see what happens if the temp sender i just replaced works at least i may know if the temp goes up and down. thanks.
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#9 03-24-2010, 06:42 PM,
Anybody know what sound to you might hear when the waterpump is going bad. I have a roaring noise that is really noticeable at high speeds. What happens if one of the fins breaks off the impeller? When I pulled into the garage yesterday, I heard a sound like something broke loose in the area of the waterpump. Guess the only way to check is to open it up.
Bryce
85 Interstate Wineberry Red
86 Interstate Denuim Blue Metalic
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#10 03-24-2010, 07:09 PM,
Possibly the noise is from a belt tensioner bearing gone bad...
Ed Zogg
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#11 03-30-2010, 07:43 AM,
I am having a heating problem after the ext. alternator install. I don't know how high the heat gauge should go on a 90 degree day but mine creeps up at high Interstate speed to only having 2 bars left to be in the red. Have any of you had this? I haven't had the rad off to have it boiled out. looks clean with 72k miles on it.
Do any of you use Water Wetter antifreeze additive? If so, what are your thoughts.

Also, do water pumps make any noise when they are going bad?
Thanks for any replies. Bob
Reply
#12 06-11-2010, 06:56 PM,
Tricky,

I’m in the middle of replacing my water pump and have found a few superseded part numbers, plus one important gasket that was not on your original list:

O-ring 91305-KT7-003 replaces 91303-283-000

O-ring 91333-KE5-003 replaces 91333-567-010

The missing gasket is the water pump gasket, part number 11396-371-306, that goes under the water pump cover! Can’t do the job without it.

Also, while you’re at it you might as well replace the o-ring under the water pump gooseneck cap. O-ring part number 91305-426-003.

I think that does it.
'87 GL1200A - Black/Grey
'06 GL1800 - Arctic White
'81 CB750C - Blue/Blue
U.S. Navy SWO (1967 to 1976)
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#13 02-17-2011, 08:32 AM,
Gentlemen and ladies. What is supposed to come out of the weep hole behing the pump housing?? Must be something, else why a weep hole.
Bob
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#14 02-17-2011, 01:49 PM,
If ever fluid comes out of the weep hole, it's simply telling you that something is wrong. It should either be coolant or oil. It's designed to allow the fluid to escape without contaminating. Oil in the coolant is bad, and coolant in the oil can be fatal.
For what is a man profited, if he shall gain the whole world, and lose his own soul? Matthew 16:26
For the love of money is a root of all kinds of evil. 1 Timothy 6:10
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#15 02-17-2011, 03:32 PM,


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