87 aspy temp


Information and questions on GL1200 Goldwings (1984-1987)
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steve allen
Posts: 149
Joined: Thu Nov 19, 2009 8:51 am
Location: theodore, al
Motorcycle: 1987 1200 Aspencade
1994 GL1500 SE
1995 CB1000

87 aspy temp

Postby steve allen » Wed Jun 04, 2014 8:44 pm



I have an 87 Aspencade that I had a bad head gasket, replaced, had head work done at machine shop. Everything was working well, put about 750 miles, doing great. Then, I suddenly have temp going up, got home before it redlined. Overflow bottle full, after an hour, bottle dry, took a cup of antifreeze to top of radiator. I rode about 10 miles Sunday round trip, then another 10 mile trip tonight, temperature rose within 1 bar of red. Checked overflow bottle again, full to the top. Question is what is happening? I replaced thermostat when head gasket was done. Hoses are good, is this a sign my pump is bad? I am getting so tired working on this bike, but on retirement, I can't afford anything else. Someone please help me!!!!!!!!



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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: 87 aspy temp

Postby WingAdmin » Wed Jun 04, 2014 8:47 pm

This is usually a sign of a bad thermostat (new one could be bad, stranger things have happened), however it could also be due to a bad radiator cap. If the radiator cap isn't holding pressure like it should, it will let hot coolant into the reservoir, and won't pressurize the system correctly, which means the coolant can't carry as much heat (i.e. it will boil at a lower temperature). It could also be a blockage in the radiator or elsewhere in the coolant system somewhere.

steve allen
Posts: 149
Joined: Thu Nov 19, 2009 8:51 am
Location: theodore, al
Motorcycle: 1987 1200 Aspencade
1994 GL1500 SE
1995 CB1000

Re: 87 aspy temp

Postby steve allen » Wed Jun 04, 2014 9:09 pm

gonna go tomorrow and get another thermostat and get a new radiator cap as well. Question, me living here on the gulf-coast, could I run bike without thermostat?

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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: 87 aspy temp

Postby WingAdmin » Thu Jun 05, 2014 8:55 am

steve allen wrote:gonna go tomorrow and get another thermostat and get a new radiator cap as well. Question, me living here on the gulf-coast, could I run bike without thermostat?


Don't run the bike without a thermostat. The bike is designed to run efficiently in a specific temperature range. Running it without a thermostat will cause it to run cooler than it was designed, which means higher temperature differentials within the engine block, which can lead to accelerated wear, head gasket failures, and can cause poor mileage.

rzaugg
Posts: 88
Joined: Tue Oct 01, 2013 10:04 pm
Location: Cedar Rapids, Ia
Motorcycle: 1984 GL1200 Aspencade
1989 GL1500 Aspencade

Re: 87 aspy temp

Postby rzaugg » Thu Jun 05, 2014 12:07 pm

Is your fan coming on?

steve allen
Posts: 149
Joined: Thu Nov 19, 2009 8:51 am
Location: theodore, al
Motorcycle: 1987 1200 Aspencade
1994 GL1500 SE
1995 CB1000

Re: 87 aspy temp

Postby steve allen » Thu Jun 05, 2014 3:22 pm

No it didn't! I do wonder if I got fan plugged in all the way. Does not affect the fact that the temperature rose enough to boil and overflow into bottle. I'm gonna check fan plug when I tear down to replace thermostat and radiator cap. Fan did run before I replaced head gasket. I will admit, I need all the advice and help I can get. Thanks.

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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: 87 aspy temp

Postby WingAdmin » Thu Jun 05, 2014 9:32 pm

If the fan isn't coming on, it's possible you have air in your cooling system. If there is an air bubble in your cooling system, and the fan thermostat isn't submersed in coolant, the fan will never come on. Did you burp your cooling system after you refilled the coolant?

steve allen
Posts: 149
Joined: Thu Nov 19, 2009 8:51 am
Location: theodore, al
Motorcycle: 1987 1200 Aspencade
1994 GL1500 SE
1995 CB1000

Re: 87 aspy temp

Postby steve allen » Thu Jun 05, 2014 10:22 pm

Didn't do that. How is the best way to do that? I sealed system and ran for a day after headgasket replacement and coolant was full....until lately! Anyway, how is the best way to burp system? I did get new thermostat and cap today, won't attempt replacement until this weekend. Any guidance and help is greatly appreciated. Thanks, Steve

rzaugg
Posts: 88
Joined: Tue Oct 01, 2013 10:04 pm
Location: Cedar Rapids, Ia
Motorcycle: 1984 GL1200 Aspencade
1989 GL1500 Aspencade

Re: 87 aspy temp

Postby rzaugg » Fri Jun 06, 2014 7:51 am

Other reason for not leaving t-stat out, (have proven this with dynamometer tests) the body of the t-stat provides a certain amount of restriction to allow coolant to stay in radiator longer and cool more. Since you are in a warm climate, the coolant doesn't have enough time spent in radiator to cool enough so it would actually run hotter.

When installing t-stat, make sure that the pin hole that is in the body of the t-stat is on the top side. That hole is to bleed air out of the system while filling.

Before you tear it apart again, try to do more root cause analysis, when you start the engine and it is warming up, radiator should be cold until it gets up to operating temp. 4 bars on the gauge for mine. At that point or somewhere around there, the upper hose then the radiator should start warming up at the top and working it's way down. Take your lower fairings off and the screen off of your radiator. Physically feel the core of the radiator. Should be a consistent temperature all the way across. (hint) an infared temperature gun comes in really handy.

Side note, the reason that the bottle is filling up when it gets hot is that liquids cannot be compressed. the bottle is there for expansion as the temperature rises. Years ago, it just dumped out on the ground, then someone came up with the idea to contain it and hold it. It pulls it back into the radiator as it cools down.

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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: 87 aspy temp

Postby WingAdmin » Fri Jun 06, 2014 9:45 am

steve allen wrote:Didn't do that. How is the best way to do that? I sealed system and ran for a day after headgasket replacement and coolant was full....until lately! Anyway, how is the best way to burp system? I did get new thermostat and cap today, won't attempt replacement until this weekend. Any guidance and help is greatly appreciated. Thanks, Steve


After you refill the coolant, when the engine is cool, open the radiator cap. Start the engine and let it idle. You will see bubbles start to come up the radiator neck, and the coolant level will go down as the bubbles come up. Immediately as the coolant goes down, add more coolant to keep the level at the radiator neck as shown. Keep doing this as the engine warms up. Sometimes I will goose the throttle a little bit to make sure all the bubbles of air are dislodged from within the system and make it up to the radiator neck.

Image

Eventually, no more bubbles will appear, and the coolant will start to rise and try to overflow the radiator neck. Install the radiator cap and shut down.

steve allen
Posts: 149
Joined: Thu Nov 19, 2009 8:51 am
Location: theodore, al
Motorcycle: 1987 1200 Aspencade
1994 GL1500 SE
1995 CB1000

Re: 87 aspy temp

Postby steve allen » Mon Jun 16, 2014 6:59 am

Well, replaced radiator with new cap, started engine up.......white smoke coming out right exhaust AGAIN! So disappointed, I had original motor to blow head gasket on right side...replaced with a lower mileage motor and after a couple of thousand miles, right head gasket on new motor blew, repaired, head reworked in machine shop, 700 miles later, same thing happened. Oh, yes, had radiator serviced by mother Honda and reinstalled. Gonna fix one more time with head gasket and sell bike. Going to give up for awhile.....maybe I'm not supposed to be riding! I have spent around 3500 dollars on a 1500 dollar bike and still not able to ride. Down and out.....wing broken!




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