Water pump?!?!


Information and questions on GL1000 Goldwings (1975-1979)
  • Sponsored Links
User avatar
twaggoner
Posts: 36
Joined: Mon Oct 31, 2011 6:28 pm
Location: Mooresville, IN
Motorcycle: 1977 GL1000

Water pump?!?!

Postby twaggoner » Wed Oct 24, 2012 10:26 am



I guess I have two questions...
1. Does the 77 GL1000 normally run to the high side of the temp gage?
It will run to low of normal and then go to the high temp side. I have replaced the therostat earlier this summer so I am thinking that it could be the water pump

2. What is best to check to see if your water pump is operating properly?



User avatar
virgilmobile
Posts: 7659
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Water pump?!?!

Postby virgilmobile » Wed Oct 24, 2012 4:26 pm

Pull the lower radiator hose and the front cover from the pump.
It will not rotate and it should not have ANY lateral movement on the impeller.

If your bike is running a bit warm,I'd be looking elsewhere tho.
Bring the bike up to normal temp with the radiator cap off and look at the fluid for bubbles(blown head gasket) and fluid flow.
Yes it can run normal with a blown head gasket and it can cause overheating.
Actually measure the temperature of the fluid too.
The bike should run 165-185* normally.....
Perhaps a inaccurate sending unit or gauge/voltage regulator is your problem.
A "funny"regulator can cause both the fuel and temp gauge to read inaccurately.

On the road,mine would run just below half of the gauge,sitting in traffic it would run almost to the red line before the fan kicked in....When it did,it would slowly lower it back to just over half way.

User avatar
twaggoner
Posts: 36
Joined: Mon Oct 31, 2011 6:28 pm
Location: Mooresville, IN
Motorcycle: 1977 GL1000

Re: Water pump?!?!

Postby twaggoner » Thu Oct 25, 2012 6:32 am

If the head gasket is blown...I thought that would burn up my coolant? And, when I do run it without the radiator cap on...if I see fluid movement and no bubbles...I take it that is a good thing?!?!
I think I have stated this before in one of my posts, this is my first season owning and riding this bike so it is a work in progress. Definitly learning as I go! I appreicate your advice and will give it shot this weekend!

User avatar
virgilmobile
Posts: 7659
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Water pump?!?!

Postby virgilmobile » Thu Oct 25, 2012 6:57 am

A head gasket can leak just a little into the water jacket and cause overheating.Bubbles too.
So no bubbles is a good thing.
Does your fuel gauge also read abnormally?There linked together to a 7 volt regulator.They can get flakey,and cause bolth to go up and down.
Is there any rattling noise from the pump?Stick a screwdriver to it and your ear and listen to it.If the impeller is wiggling about,it may be caveating the fluid.
When all else fails,remove the radiator and have it cleaned.
Does the cooling fan kick on and off while just idling?
Mine will cycle every 4-5 minutes or so.

User avatar
virgilmobile
Posts: 7659
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Water pump?!?!

Postby virgilmobile » Thu Oct 25, 2012 7:00 am

Treat the engine as it is designed.
It's a boxer water cooled high performance engine.Very much like you'd find in a European car.

User avatar
twaggoner
Posts: 36
Joined: Mon Oct 31, 2011 6:28 pm
Location: Mooresville, IN
Motorcycle: 1977 GL1000

Re: Water pump?!?!

Postby twaggoner » Thu Oct 25, 2012 9:08 am

I always try to remember that it is 35 years old so I should not be suprised if things are working loose. When you you say treat is like it was designed... I do enjoy aggressive riding I just want to be sure that my GL is ready for it.

User avatar
virgilmobile
Posts: 7659
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Water pump?!?!

Postby virgilmobile » Thu Oct 25, 2012 10:35 am

After I was done with my 78..It near seperated my arms at the sholders. :D
Everything had to be done exactly right for that to happen.
Points,carbs,timing and valve adjustments.
I improved the cold start by installing a electric fuel pump and electronic ignition.It really made a difference in getting it going.

User avatar
twaggoner
Posts: 36
Joined: Mon Oct 31, 2011 6:28 pm
Location: Mooresville, IN
Motorcycle: 1977 GL1000

Re: Water pump?!?!

Postby twaggoner » Thu Oct 25, 2012 12:18 pm

Nice!!! Electronic ignition has been installed by a previous owner so that much of it is done. I am going to execute the suggestions that you gave and see where it gets me. I have been blessed with some very nice riding days but, with the temp appearing to spike I do not want to cause any damage to the ol-girl so I may have it on the center stand for a few days. Oh... Thanks again for all of your help!

sfruechte
Posts: 193
Joined: Tue Mar 09, 2010 12:53 pm
Location: La Crosse, WI
Motorcycle: 1977 GL1000

Re: Water pump?!?!

Postby sfruechte » Thu Nov 01, 2012 1:52 pm

My 77 runs on the cold side of the normal range on the highway and has since it was new.

I wonder what an electric fuel pump would do for cold starting. The fuel pump is upstream of the carburetor bowls which supplies the fuel for starting and running.

User avatar
tom84std
Posts: 493
Joined: Fri Jul 13, 2012 7:40 am
Location: Arlington, Texas
Motorcycle: '84 STD 1200
2002 VTX1800
2007 Shadow 750
69 BSA Bitsa
2004 Virago
VW Trike

Re: Water pump?!?!

Postby tom84std » Sun Nov 04, 2012 2:37 pm

The old mechanical fuel pumps normally supply around 2-4 or 6 PSI while the engine runs, depending on engine RPM. Even at the low end that's plenty of pressure to supply the engine with fuel, providing the carbs are feeding it properly. After running the engine for a time and allowing it so sit, the carb's bowls should be fully full of fuel and that shouldn't change at all for at least a month providing the gaskets are good and the carbs are in good shape. The fuel will eventually evaporate, but it takes months. If your mechanical pump is operating properly and it's filter is unobstructed it'll more than keep up with the engine's fuel requirements even at it's low end of 2PSI so long as the float is dropping and the needle is opening. To me, the difference between an electrical pump and a properly matched mechanical one is nill. They can both easily keep up with the requirements of the engine. This doesen't account for failures in valves or clogs in lines or filters.

User avatar
Fred Camper
Posts: 1152
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Water pump?!?!

Postby Fred Camper » Sun Nov 04, 2012 2:54 pm

The advantage of the electrical fuel pump is that it flows fuel with the ignition on and the engine not running. So if the bike has set too long and the carbs are low, the electric pump will fill the carbs faster. But once running, I cannot see any advantage.




Return to “GL1000 Information & Questions”




Who is online

Users browsing this forum: No registered users and 2 guests