Running hot


Information and questions on GL1500 Goldwings (1988-2000)
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tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Running hot

Post by tvanvran »



3 weeks ago we went on a 125 mile ride. Noticed it was running hot, but never overheated. When we got home and parked in the garage I heard a gurgling noice. Fluid level was low so I flushed the system and put in new antifreeze. Used around town and no issues. Did 100 mile ride with friends in hilly winding roads in Ohio today and it was running on the hot side of half way. When We got home it was again gurgling. Fluid levels were ok but some fluid (not sure what it was possibly antifreeze) was all over the lower part of the bike especially my wife’s shoes and pants. Any ideas would be appreciated. 1994 Aspencade trike 109,000 miles.


tnt9339
Posts: 65
Joined: Sat Jun 02, 2018 3:40 pm
Location: Forest Grove, OR
Motorcycle: 2018 GL1800 DCT Tour
1990 GL 1500A Aspencade

Previously owned;
1978 CB550/4
1976 GL1000
1983 VT500 Shadow
1983 GL650 Interstate
1985 GL1200 Interstate
1995 GL1500 Aspencade
2001 GL1800

Re: Running hot

Post by tnt9339 »

I had a similar problem when I got my used 1500. Follow the hose from the radiator cap to the coolant reserve tank. The seal around the hose that goes into the tank fails and leaks out coolant when it gets hot. Easy fix. I think the hose was about $9.00 or so.

Tony
tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Re: Running hot

Post by tvanvran »

Thanks, I’ll look tomorrow. Would that make it run hotter than normal?
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WingAdmin
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Re: Running hot

Post by WingAdmin »

tvanvran wrote: Sun Jun 27, 2021 8:22 pm 3 weeks ago we went on a 125 mile ride. Noticed it was running hot, but never overheated. When we got home and parked in the garage I heard a gurgling noice. Fluid level was low so I flushed the system and put in new antifreeze. Used around town and no issues. Did 100 mile ride with friends in hilly winding roads in Ohio today and it was running on the hot side of half way. When We got home it was again gurgling. Fluid levels were ok but some fluid (not sure what it was possibly antifreeze) was all over the lower part of the bike especially my wife’s shoes and pants. Any ideas would be appreciated. 1994 Aspencade trike 109,000 miles.
Are you sure it was the coolant gurgling? It's not uncommon for the fuel in the fuel tank to boil when the bike sits, heat-soaked, after a hot ride. Gasoline will start to boil when it reaches 95°F.
tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Re: Running hot

Post by tvanvran »

What was coming out from under the lower panels and getting on the passengers foot rest was definitely not fuel. And it sure sounded like it was coming from the radiator. Going to take the top apart so maybe I can see where it’s coming from.
Solo So Long
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Re: Running hot

Post by Solo So Long »

The Goldwing has a pressurized cooling system, like a car. This means that it can run temps above boiling, WITHOUT boiling (high school physics).

If you have a leak (and resulting loss of pressure), the coolant boils at a lower temp than it normally would, just like if you were at a higher altitude.
tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Re: Running hot

Post by tvanvran »

Could this be my leaking point? Tube from Rad to reserve tank at the elbow going into the res tank pulled out completely (going to try to upload photos). I lost about 1/2 gallon of antifreeze (after I drained and flushed) from the ride that caused me to post. But the res tank was full. Could the loss of pressure from this small break cause it to run hot? It never completely overheated just on the hot side of the middle on the gauge. The anti freeze leaked around the lip of the air box but not in it, so I'm thinking that it leaked down and came out just above the engine on the right side. IMG_0917.jpg IMG_0921.jpg IMG_0919.jpg. Also how to I get the downtube going into the res tank out? Is it just pressed in?
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Charlie1Horse
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1992 GL1500I Interstate

Re: Running hot

Post by Charlie1Horse »

Sounds like you may have a bad radiator cap. These caps have 2 seals on them. One seal keeps pressure in the radiator as the temperature increases, (physics, hot=expansion, cold=contraction). The other seal seals at the top of the radiator neck and causes the radiator to suck the coolant back into the radiator as it cools, (contracts). A combination of a bad radiator cap and a leak between the radiator and the coolant reservoir will cause pressurized coolant to move to the reservoir but, if there is a leak, it will go on the ground. Then when the radiator cools, (contracts), the radiator will be sucking air back into it because air is easier to draw than liquid. Just like drinking with a straw. If you suck your drink through the straw, it takes more suction than if the straw is not in the liquid and you are sucking air. I hope this helps.
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tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Re: Running hot

Post by tvanvran »

Buying the parts tomorrow. Are there any videos on how to remove the down tube that goes into the res tanks. The top rubber wore away. If I knew how to post pictures I could show youImage
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bellboy40
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Re: Running hot

Post by bellboy40 »

tvanvran wrote: Thu Jul 01, 2021 10:43 pm Buying the parts tomorrow. Are there any videos on how to remove the down tube that goes into the res tanks. The top rubber wore away. If I knew how to post pictures I could show youImage
Here is directions on how to add pictures to your message by WingAdmin.
viewtopic.php?f=3&t=5647
tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Re: Running hot

Post by tvanvran »

IMG_0921.jpg
This is the part that broke off that I need to replace. It is the downtube going into the reserve tank. Are there any How-To's that help?

I'm assuming that it just presses into the tank and the "L" tube attaches to that.

Also going to get a new radiator cap and see what happens.
tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Re: Running hot

Post by tvanvran »



tvanvran
Posts: 46
Joined: Tue Jul 03, 2012 9:09 am
Location: Louisville, Ohio
Motorcycle: 1994 Honda Aspencade Trike

Re: Running hot

Post by tvanvran »

tnt9339 wrote: Sun Jun 27, 2021 9:59 pm I had a similar problem when I got my used 1500. Follow the hose from the radiator cap to the coolant reserve tank. The seal around the hose that goes into the tank fails and leaks out coolant when it gets hot. Easy fix. I think the hose was about $9.00 or so.

Tony
Looks like you were correct. Did you have any issues getting the old down tube out of the tank?
tnt9339
Posts: 65
Joined: Sat Jun 02, 2018 3:40 pm
Location: Forest Grove, OR
Motorcycle: 2018 GL1800 DCT Tour
1990 GL 1500A Aspencade

Previously owned;
1978 CB550/4
1976 GL1000
1983 VT500 Shadow
1983 GL650 Interstate
1985 GL1200 Interstate
1995 GL1500 Aspencade
2001 GL1800

Re: Running hot

Post by tnt9339 »

No. Mine was not broken off, just split about 3/4 of the way around. Glad I could help.

Tony


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