Question on overheating


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pschweitzer
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Motorcycle: 1983 Goldwing Interstate GL1100I

Question on overheating

Post by pschweitzer » Sat May 09, 2015 4:41 pm



My '83 Interstate is running OK but after riding for about half an hour when I sit at a light the temperature starts to creep up. As soon as I get air moving again the temperature drops. The fan is working but it just can't keep up. When I did the head work last winter I did check the water pump for play (it is the original bakelite pump). I'm not losing or leaking fluid or blowing smoke out the exhaust. I have flushed the radiator with water and have fresh coolant. I don't think there were any bubbles after I charged the system. I have seen some post on this topic before, but have one question before I start ordering parts. Do the original water pumps on these bikes wear out where they just don't deliver the needed flow anymore? I am thinking that I need a major flush of the radiator and even though the pump bearings seem OK I should change that as well. Any advice?



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Aussie81Interstate
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Re: Question on overheating

Post by Aussie81Interstate » Sat May 09, 2015 4:53 pm

How far does the temp needle move towards the red line?

Mine does exactly the same it will get half way in stopped traffic and as soon as it goes further the fan comes on - but will still climb toward the red line. I've only seen it get about 4-5 needle widths away from the start of the red - it will then drop back to a normal level (just above the cold mark) after a minute or two of cruising. If its a really hot day it might sit above the cold mark.

cheers

Mine also has the original water pump - they would wear out - flow rate -don't know.

Replace it if you want to - otherwise if it is still working as in " if it ain't broke don't fix it" :)

:)

pschweitzer
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Re: Question on overheating

Post by pschweitzer » Sun May 10, 2015 5:21 pm

Aussie,

You were right. I went out for a short ride just to heat up the bike, but made sure I would be home when I sat for a while. The temp stayed about half scale for the ride and when I got home I just sat for about 20 minutes and watched, but ready to shut down if any issues. The temp rose to a little over 3/4 and then the fan kicked in and it dropped. I watch it do this for about three cycles then shut down for the evening. I guess I was just paranoid. Here is a picture of how hot it got.


Also, I have had a lot of help with this bike on this forum and no real pictures. I bought this about 2 years ago for $1500 and it was running (sort of) but was in need of a lot of mechanical TLC after sitting for a while. I have found after tinkering with this bike that they do not like to be left alone for very long. They need to be ridden. This picture is in shadow and I need to take a better one.


Pat

tomos
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Re: Question on overheating

Post by tomos » Sun May 10, 2015 5:43 pm

Hi you should check out rubber hose inside the over flow tank.On my bike it was split up and was not able to transfer fluid , and also replace radiator cap with genuine Honda part.If cap don't open under pressure temperature will climb up .
I hope that my experience with this problem can help you .
Regards Zoran

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roadwanderer2
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Re: Question on overheating

Post by roadwanderer2 » Sun May 10, 2015 6:34 pm

my 83 aspy does the same thing. don't be alarmed, from what i hear this is the bike's normal operating temperature.....Pschweitzer, i can ride mine all day long and the temp gauge will never go any higher than yours does unless im sitting in bumper to bumper traffic for more than 15 minutes, and once it gets out into the open air, it drops down to the half way mark. i just changed my antifreeze last week and it still runs the same and im sure my water pump is also original with over 100,000 miles on it, and if it aint broke, leaking fluid or pinning at the red line, i aint touching it lol.

stuart.

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Aussie81Interstate
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Re: Question on overheating

Post by Aussie81Interstate » Mon May 11, 2015 4:44 pm

Where that needle shows is pretty accurate comapred to mine as well - it has only got up there on a few occasions - but my bike hates sitting in traffic at any time - and will climb pretty well straight away after about a two minutes of not moving in traffic.

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roadwanderer2
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Re: Question on overheating

Post by roadwanderer2 » Mon May 11, 2015 5:19 pm

there was only one time that my bikes temp gauge went up to the H line. i got stuck sitting in about 5 miles of bumper to bumper traffic due to road construction on the interstate. we were crawling at about 2 miles an hour and stopping and going which seemed to be forever and im sure it didn't do my clutch any good either until i passed the road crew, and as soon as i got back into open air, the temp gauge went back down to half way and stayed there. i thought for sure i was gonna have to pull off the road and let the bike's motor cool down for a while, but the rest of the ride home was uneventful. these bikes seem to run a bit on the high side of normal without over heating.

stuart.

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WingAdmin
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Re: Question on overheating

Post by WingAdmin » Tue May 12, 2015 9:18 am

I was stuck in long construction traffic for about an hour on a trip down to Florida, where they had only one lane of a two-lane highway open, for about three miles. They had flagmen at either end, and would swap directions for traffic to get through every 5 minutes or so. As a result, I would end up sitting motionless for a good 5 minutes at a time. I decided to just shut the bike off while waiting, and start it only when we creeped ahead every so often.

Waiting in construction traffic jam
Waiting in construction traffic jam


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roadwanderer2
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Re: Question on overheating

Post by roadwanderer2 » Tue May 12, 2015 9:59 am

is there a lower heat range thermostat that can be put into these motors instead of using a 180*? that might keep the temp from going up to high before the thermostat opens up and allow the cooling fan comes on sooner, say around a 140*?.

stuart.

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Re: Question on overheating

Post by WingAdmin » Tue May 12, 2015 10:09 am

roadwanderer2 wrote:is there a lower heat range thermostat that can be put into these motors instead of using a 180*? that might keep the temp from going up to high before the thermostat opens up and allow the cooling fan comes on sooner, say around a 140*?.

stuart.
Yes. But should you do it? No. Honda designed the engines to operate best in the temperature range that the thermostat is set for. It's not harmful to have it run hot, it just means it's not moving the heat away as efficiently as when you have lots of airflow over the radiator.

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roadwanderer2
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Re: Question on overheating

Post by roadwanderer2 » Tue May 12, 2015 11:13 am

ok, well, it was just a thought. heres another thought, not sure if it would do any good, but, ive seen some of these older wings with an air scoop just under the radiator like the one in this link, http://www.ebay.com/itm/171779234474?_t ... EBIDX%3AIT do they help in scooping up air and directing it towards the radiator to get more air flow to it to keep the engine temp down?

stuart.

6ft10ona1100
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Re: Question on overheating

Post by 6ft10ona1100 » Tue May 12, 2015 11:11 pm

I'm new to this two wheel thing so please forgive the dumb questions. I inherited a 1983 Interstate from my favorite Uncle, who at 80 decided maybe he should stop riding after 100,000 plus miles. I just found a tiny pinhole leak in the radiator, don't really know how long it's been there, but I think it's new. Not much build up on the radiator fins. My question is can I use standard radiator stop leak like I would in a car, or do I need to replace the radiator before I can ride again? The leak is pretty small and I just let the bike idle in the garage for an hour without overheating, ambient temp here today was in the 90's.

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Aussie81Interstate
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Re: Question on overheating

Post by Aussie81Interstate » Wed May 13, 2015 5:57 am

can you get a better idea where the leak is coming from - better to find out exactly where it is before making any decision to fix or throw some product at it.

any chance of a picture ?
:)

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Re: Question on overheating

Post by roadwanderer2 » Wed May 13, 2015 7:18 am

welcome to the wonderful world of Goldwings, and no, its not a dumb question.

a small pin hole leak in ANY radiator can become a problem down the road. best advice, (in my personal opinion being a retired auto tech), take it off the bike, there is a section in the "how-to" articles to remove the radiator, take it to a radiator repair shop and have it repaired. using "stop leak" in a car's radiator is ok because its a lot larger, but a bike's radiator is so much smaller i would be afraid it would clog up the passageways and could lead to an overheating situation.

stuart.

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Re: Question on overheating

Post by WingAdmin » Wed May 13, 2015 11:49 am

Stuart is right, using Stop Leak in a bike cooling system will clog things up and cause overheating problems. Do just what he said - take it to a rad shop for them to solder and fix.

6ft10ona1100
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Re: Question on overheating

Post by 6ft10ona1100 » Mon May 18, 2015 8:36 pm

Thanks guys. I found a used radiator on ebay from a top seller with no leaks. I'll see when it comes in. It cost less than a repair.

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Re: Question on overheating

Post by roadwanderer2 » Tue May 19, 2015 6:24 am

6ft10ona1100 wrote:Thanks guys. I found a used radiator on ebay from a top seller with no leaks. I'll see when it comes in. It cost less than a repair.
that's good news 6ft. one word of advise, when you get it, take it to the radiator shop anyway and have it "pressure tested" and cleaned to make sure it has no leaks BEFORE you put it on your bike that way you'll save yourself the hassle of having to take it back off in case it does have any problems, and get yourself a new radiator cap for it.

i have a question to ask you....just out of curiosity, i know things are expensive down in Florida having lived in key largo for a number of years and not to be nosey or anything, but how much does a radiator shop want to fix it?.

stuart.

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Goldskooler
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Re: Question on overheating

Post by Goldskooler » Wed Jul 11, 2018 7:58 am

My 83 Aspy, is overheating. Cruising at 55-60 and the gauge would hover in the mid to slightly upper. However, as soon as I stopped, the digital temp gauge pushes upto one below extreme.. and sometimes into the max, very quickly.

So I'm confident on ripping and tearing the system down. So far I'm going to use

KL seal kit ($30 - $40)
Thermostat
Rad cap
Pump (at least $100 to ensure quality)
Hose from Napa

Is there a definite list of part numbers that I can cross reference with?

Many thanks

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DWade1990
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Re: Question on overheating

Post by DWade1990 » Wed Jul 11, 2018 3:00 pm

Goldskooler wrote:
Wed Jul 11, 2018 7:58 am
My 83 Aspy, is overheating. Cruising at 55-60 and the gauge would hover in the mid to slightly upper. However, as soon as I stopped, the digital temp gauge pushes upto one below extreme.. and sometimes into the max, very quickly.

So I'm confident on ripping and tearing the system down. So far I'm going to use

KL seal kit ($30 - $40)
Thermostat
Rad cap
Pump (at least $100 to ensure quality)
Hose from Napa

Is there a definite list of part numbers that I can cross reference with?

Many thanks
Before you start throwing money at it, have you done any troubleshooting to make sure it isn't something simple? Is your fan working? If not, pull the plug off the sender and use a pair of needle nose pliers to connect the circuit and see if the fan works. If this makes the fan turn on, but it doesn't under normal operation, your switch may be gummed up. My 83 Aspencade will get no higher than the first bar above middle, even when sitting in traffic. However, I forgot to hook the fan up one time, and the temp quickly climbed up to the top of the gauge until I shut it down. Check the simple stuff first.

Have you removed the radiator cap and burped they system to make sure there isn't any air in it? An air pocket trapped somewhere is a sure way to make it overheat.

Does the exhaust smell like coolant? Hopefully it isn't a head gasket.

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Goldskooler
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Re: Question on overheating

Post by Goldskooler » Wed Jul 11, 2018 5:35 pm

I haven't "burped" The system, kind of curious to know how that is done successfully.

Fan does kick on, when gauge reaches above mid mark. I've put my palm on the radiator fins, and there is cooling air the same diameter as the fan. However, the bottom of the radiator is still boiling hot.

So thermostat is good. Cap I'm not 100%, or hoses for that matter.

So how do you burp the radiator..just blow air through the filler cap??

Thanks.

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Re: Question on overheating

Post by WingAdmin » Wed Jul 11, 2018 5:37 pm

Goldskooler wrote:
Wed Jul 11, 2018 5:35 pm
I haven't "burped" The system, kind of curious to know how that is done successfully.

Fan does kick on, when gauge reaches above mid mark. I've put my palm on the radiator fins, and there is cooling air the same diameter as the fan. However, the bottom of the radiator is still boiling hot.

So thermostat is good. Cap I'm not 100%, or hoses for that matter.

So how do you burp the radiator..just blow air through the filler cap??

Thanks.
Start with the bike dead cold. With the radiator cap OFF, run the engine for several minutes, adding coolant to keep the coolant level near the top of the filler neck as it runs. You may need to rev the engine several times in order to get all the air out of the system. Each time the coolant level drops, add more coolant to bring it back up to the filler neck.

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Re: Question on overheating

Post by DWade1990 » Wed Jul 11, 2018 6:08 pm

WingAdmin is on the money. I like to keep it running at least till the fan comes on, that way you know the thermostat is open, or at least it should be as long as it's doing its job. Just be ready, because it will probably overflow a little or spit some coolant out depending how much air comes out.

Also, make sure it's the cap on the radiator that's open and you're adding coolant to, not the expansion reservoir.

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Goldskooler
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Re: Question on overheating

Post by Goldskooler » Fri Jul 13, 2018 7:04 pm

Regarding overheating:

Fan kicks in, when temp reaches above 60%, So thermostat is working.

Took seat, fairings, fake tank off, just before. Added coolant to radiator, to the point I could just the level in the radiator neck. Fired up from cold, waited about 2 minutes, and give a little throttle. Level stayed where it was.

So...

Either radiator is clogged / blocked, or pump is toast I think.

So if I'm going that deep, might as well change hoses.

Is there a good way to soak / flush the radiator, that doesn't cause much harm??

Thanks

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Re: Question on overheating

Post by DaveO430 » Fri Jul 13, 2018 7:13 pm

I actually unsoldered the bottom tank of a radiator to be able to rod the tubes out. Apparently someone had put stop leak of some kind in it and very few of the tubes had free flow through them. Seemed fine running on the stand but overheated riding about 10 miles. If yours is not too bad plug the openings and pour it full of vinegar and let it set a day.

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Re: Question on overheating

Post by DWade1990 » Fri Jul 13, 2018 7:32 pm

2 minutes isn't near long enough. I like to go until the fan kicks on. I'll usually let it run for 15 minutes to make sure its fully bled. You have to let the motor get to full operating temperature.



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