Water pump question

billcountryman · Post by **billcountryman** » Thu Nov 29, 2012 5:41 pm

I've a 1984 Goldwing GL1200. While working on this bike I thought I change out the thermostat. Found out there wasn't one in place. It wants to run hot on me. I live in Phoenix but right now the weather's really good. I've learned that Carquest 62438 works on this bike so wanted to see if anyone could verify that. Also wondering about a method to check to see if the water pump is working properly. I'm wondering if I can check the flow through the radiator with the cap off? Any ideas? Thanks. Bill

virgilmobile · Post by **virgilmobile** » Fri Nov 30, 2012 2:01 pm

Don't have a part number for the thermostat but personally I'd take off the front cover to the water pump and see if there is any lateral movement in the impeller.The bearings can be bad and the pump not leak and pump OK.

newday777 · Post by **newday777** » Sat Dec 01, 2012 9:11 am

Copied from http://www.goldwingfacts.com/forums/10- ... mbers.html

Be sure to replace the hoses too.

He lists a stant thermostat number which you can cross reference if you want to.

just to recap parts numbers for my 85 gl1200a.

advance auto parts, radiator hose: pn/ E71604CS. 11.99

Stant, Thermostat: pn/ 13868 7.98
Radiator Hose

GL1000, GL1100, GL1200 (Cut in halfto make2 hoses) NAPA - 7733 Gates - 21008

billcountryman · Post by **billcountryman** » Sat Dec 01, 2012 9:53 am

Thanks I appreciate the. Help

billcountryman · Post by **billcountryman** » Mon Dec 03, 2012 8:33 pm

I'm back with a question on how to know if a water pump is bad. It's a 1984 Honda Goldwing GL1200 and it's wanting to run a little hot. There is no thermostat in the bike and while riding I heard a high pitched squeal which I figured was the fan bearings. I pulled the fan and I'm not so sure that's it.......will the water pump squeal while driving then when I come to an idle at a stop light quit? I've taken it apart at the thermostat housing and can see the impellers (there is a little wobble but not a lot)......should they spin freely by hand or are they drove right off the cam or crank?

virgilmobile · Post by **virgilmobile** » Tue Dec 04, 2012 7:51 am

It is direct drive so there should be no rotation slack.it should have NO lateral play.There are 2 sealed roller bearings in there.They can dry up.Not having a thermostat can lead to progressive rise in temp but remember it's going to run around 180-190 normally.The squeal is usually isolated to a bearing.Timing belt idler has them too.Probe and listen for it's location.

newday777 · Post by **newday777** » Tue Dec 04, 2012 9:45 am

billcountryman wrote: I've taken it apart at the thermostat housing and can see the impellers (there is a little wobble but not a lot)......should they spin freely by hand or are they drove right off the cam or crank?

You won't see the impeller from the thermostat housing. The thermostat is on top of the motor. If you are saying the front cover of the water pump w/hose at the water pump, you will see the impeller, no free spinning as it is driven by the oil pump shaft at the back of water pump. There should be no play in the impeller.
Did you remove the radiator to get to the thermostat on top of the motor? That is where the tstat is located. There is an o-ring needed for that housing too. Replace the o-rings with new ones, don't reuse them and especially don't try to use a sealer on them to go cheap.
Do you have the repair manual for your bike? #1 tool needed.
Have looked at the how to section on the forum? Many good helps there.

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