Engine overheating


Information and questions on GL1100 Goldwings (1980-1983)
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new2gold
Posts: 3
Joined: Mon Jun 21, 2010 10:39 pm
Location: beggs, oklahoma
Motorcycle: 1980 GL1100 Interstate

Engine overheating

Postby new2gold » Mon Jun 21, 2010 11:34 pm



I just bought a 1980 GL 1100 Interstate, the engine runs very well but runs hot while moving even at highway speeds. When stopped with the engine idleing the temp goes to normal as soon as you take off the temp goes up and peggs out. Coolant level is fine no radiator or water pump leaks, the previous owner had the radiator flushed about 200 miles ago. Any ideas what the problem could be ?



Jeeper
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Joined: Sat Apr 10, 2010 4:24 pm
Location: Bridgton, ME
Motorcycle: 1983 GL1100A Aspencade

Re: Engine overheating

Postby Jeeper » Tue Jun 22, 2010 8:16 am

new2gold wrote:I just bought a 1980 GL 1100 Interstate, the engine runs very well but runs hot while moving even at highway speeds. When stopped with the engine idleing the temp goes to normal as soon as you take off the temp goes up and peggs out. Coolant level is fine no radiator or water pump leaks, the previous owner had the radiator flushed about 200 miles ago. Any ideas what the problem could be ?


If the temperature is returning to normal when stopped I would suspect an electrical issue, either a bad wire/connection/temperature sending unit. The only other thing that crosses my mind if it is a coolant issue is an air bubble in the system.

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MJSantos
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Re: Engine overheating

Postby MJSantos » Tue Jun 22, 2010 1:43 pm

Right off the bat, I would make sure that the cooling system is purged of air then if it still persists might look into a thermostat. This is assuming that the radiator was actually flushed. While I'm thinking about it have you checked your stator output? Voltage flucuations could be giving you false readings along these lines Wingadmin has a post dealing with the 7 voltage regulator the feeds the Temp and Gas gauges. As I understand this would cause both gauges to give bad readings.

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WingAdmin
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Re: Engine overheating

Postby WingAdmin » Tue Jun 22, 2010 1:53 pm

That's correct. If it is electrical in nature, then both the temperature AND the fuel gauges would be rising at the same time like you mention.

I agree, you first need to make sure that a) the coolant reservoir tank is filled, b) any air has been purged from the cooling system, and if that doesn't do it, check the thermostat.

You can see instructions on purging the system of air here: How to replace your radiator hoses

bamadave
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Location: Hartselle, Al
Motorcycle: 2006 GL 1800

Re: Engine overheating

Postby bamadave » Tue Jun 22, 2010 2:46 pm

My gauges do the same and seems like I read where the rectifier could be the problem?

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WingAdmin
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Re: Engine overheating

Postby WingAdmin » Tue Jun 22, 2010 3:13 pm

If both the fuel and the temperature gauges are reading incorrectly, the problem is your 7 volt regulator. See this page for more details.

bamadave
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Re: Engine overheating

Postby bamadave » Tue Jun 22, 2010 3:24 pm

Believe I may be ordering the 7 volt regulator after reading. Both gauges do not read correctly and has been this way since I bought the bike almost a year ago.
Sure would be nice to have accurate gauge readings! :)
Thanks!

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MJSantos
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Re: Engine overheating

Postby MJSantos » Tue Jun 22, 2010 3:29 pm

Check here with Wingadmin he's got what you need.

bamadave
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Re: Engine overheating

Postby bamadave » Tue Jun 22, 2010 3:39 pm

Thanks MJ,
I plan on ordering the 7 volt regulator here. Price not bad for someone almost broke from pouring a bunch of $ into their new casa.
I saw your above post about 7 volt regulator and wondered if what I had read was rectifier. :?
Anyway, I know it is REGULATOR now, not rectifier, lol!

Dave




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