87 Aspy cooling problem


Information and questions on GL1200 Goldwings (1984-1987)
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dutchwing
Posts: 11
Joined: Wed May 08, 2013 10:08 am
Location: Leeuwarden, Fryslân, Netherlands
Motorcycle: 1987 GL1200A Aspencade
1983 GL1100 Aspencade
1982 GL1100A Customized
1981 GL1100D Sidecar

87 Aspy cooling problem

Postby dutchwing » Tue May 20, 2014 4:02 pm



First a little history on the bike. About 5000 Mls ago I changed the engine for an overhauled 87 engine. 500 Mls later had to change the stator. About 1200 Mls ago the left cylindergasket started sweating coolant, after a while dripping. Temp gauge at two/three blocs, outside temp 12°C. Changed the gasket and found out the thermostat opened no more than three mms. (should be 8). Changed it for a new one. Last week changed the right cylinderhead gasket, after that started sweating as well. Checked every part of the cooling system. The system doesn't leak. Today was 26°C. Took the bike on a trip and it ran warm: 5 to 6 blocs on the highway at 80 Mls/hr. The fan running, while having sufficiënt riding wind. Who has a clue? How do I find out if the radiator or any other part of the system is clogged? Radiator doesn't look damaged.



bustedwing
Posts: 1052
Joined: Wed Nov 30, 2011 4:17 pm
Location: Hermansville, Mich
Motorcycle: 1990 Gold wing Trike
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Re: 87 Aspy cooling problem

Postby bustedwing » Wed May 21, 2014 8:13 am

It's quite possible the radiator is slow to allow coolant thru. If you have access to a temp gun that measures surface heat you can check the radiator for flow. If not you will have to get your hands onto the outside of the radiator, feel for heat. It should feel hot on top and gradually drop off cooler to the bottom. If it's hot on top then drops to cold in one spot, then it's plugged. Their are clearners on the market at any auto parts store. Make sure you use silicon free anti freeze. Ride safe.
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SilverDave
Posts: 367
Joined: Sun Aug 09, 2009 9:39 am
Location: Langley, BC
Motorcycle: 1985 GL1200 GoldWing Aspy

Re: 87 Aspy cooling problem

Postby SilverDave » Wed May 21, 2014 10:42 am

Its a 25 + year old rad, and you probably don't know all the history of the engine . If you are down to changing thermostat , you are only about a half hour or so from removing the entire rad.

I took my rad ( GL-1200) in about 8 years ago to a shade-tree motorcycle mechanic who cleaned it, soldered the two pinholes, "rodded" it , and pressure tested it , all for less than $40.
Oh and re-painted it a nice matte black, too.

A pro rad shop might charge more , so throw yourself on their mercy . Modern rads are plastic throw-aways, so maybe they'd like to do it as a chance to revisit the past .

In any case, as its a critical part of the GL-1200 cooling system , its worth doing .
And when you re-and-re it, go to NAPA, part # NAPA - 7733 and get a new set of rad hoses for less than $25, too .

SilverDave

dutchwing
Posts: 11
Joined: Wed May 08, 2013 10:08 am
Location: Leeuwarden, Fryslân, Netherlands
Motorcycle: 1987 GL1200A Aspencade
1983 GL1100 Aspencade
1982 GL1100A Customized
1981 GL1100D Sidecar

Re: 87 Aspy cooling problem

Postby dutchwing » Wed May 21, 2014 12:00 pm

Thanx guys. Bought a cleaning agent this morning. Gonna use it saturday. When that doesn't work: there is a radiator specialist very closeby. They refurbished a GL1000 rad for me a couple of years ago by fitting a complete new core for less than $ 400...




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