Overheating


Information and questions on GL1100 Goldwings (1980-1983)
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norseman47
Posts: 52
Joined: Wed Sep 08, 2010 7:36 pm
Location: Ulster Park, NY
Motorcycle: 1982 GL1100I

Overheating

Postby norseman47 » Mon Jul 09, 2012 6:49 pm



I was "walking" my bike in a 4th of July parade, when the temp guage crept to hot & the expansion tank started over flowing. As the Harleys around me were heating up & dying, we stopped for a few minutes. I noticed my fan was not running. We all started up again & the overflow started again within a few minutes. I pulled out of the parade & shutdown. The fan was kind-of working, sort of a weak growling, for less than a minnte & quit. So, I got another fan off eBay. Tonight I removed the radiator, took off the old fan & decided to straight wire it to the battery. Old fan runs like a champ. I had replaced the hoses, temp sensor, thermostat, & guage regulator, winter of 2010/2011, so now what's the culprit? What other checks can I make? The fluid that drained is clear, with no debris. Wiring looks fine. Is there a "checks good" ohmage for the temp sensor? When cruising the temp gauge sits right down on the low end "step", like it normally does.



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seabee_
Posts: 494
Joined: Sun May 29, 2011 8:17 pm
Location: sterling heights, mi
Motorcycle: 1985 Honda Goldwing GL1200
117k miles
1977 Kawasaki kz400
1978 Suzuki GSXr750
1980 Kawasaki GPZ400
1975 Honda CB360T

Re: Overheating

Postby seabee_ » Mon Jul 09, 2012 9:50 pm

Do you have 12 volts at the fan while it's on the bike? Strange that it was slow and growling on the bike but ran fine when you powered it straight off the battery.
Paul
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic

User avatar
norseman47
Posts: 52
Joined: Wed Sep 08, 2010 7:36 pm
Location: Ulster Park, NY
Motorcycle: 1982 GL1100I

Re: Overheating

Postby norseman47 » Wed Jul 11, 2012 6:48 pm

Put the "new" low milage fan in & reassembled the system. No dice on the fan firing. So, time to check the voltage path. It'd just be my luck that the 1-1/2 yr old Saber Cycle thermo switch died. Of all the old heavy metal parts I've replaced, I can find everything, but that one! At least for short, quick, or long cruises, it runs for now.

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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: Overheating

Postby scotterichmond » Thu Jul 12, 2012 4:03 pm

I beleive the temp sensor is your source to ground, just don't forget to check it too. I would remove it and test in hot water ( check for continuity as it warms up) at a certain point it must "close" meaning 0 ohms , and infinity when "open" there is a temp that it is supposed to close, I just don't have that in front of me.

update 208F-215F deg. closing
Last edited by scotterichmond on Thu Jul 12, 2012 4:19 pm, edited 1 time in total.

User avatar
scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: Overheating

Postby scotterichmond » Thu Jul 12, 2012 4:18 pm


User avatar
norseman47
Posts: 52
Joined: Wed Sep 08, 2010 7:36 pm
Location: Ulster Park, NY
Motorcycle: 1982 GL1100I

Re: Overheating

Postby norseman47 » Thu Jul 12, 2012 6:45 pm

It is the thermo switch. I shorted the plug & the fan works fine. As the weather's too good to fuss about much right now, I rigged a toggle switch on the handlebar to work the fan, stuck the other end of the wire into the thermo switch plug & RTVed it in place. Ah... The quick fixes a little cable, tie wraps & RTV can accomplish!




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