Information and questions on GL1200 Goldwings (1984-1987)
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Postby billcrawford » Wed Apr 29, 2015 1:28 pm

how do i check for head gasket leak. i see no bubbles in radiator water is circulating i can see it rushing across in neck of the radiator

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Re: overheating

Postby Iaustin » Wed Apr 29, 2015 11:36 pm

There is a tester for vehicles ,it's just a fluid that goes in a cylinder shaped tube with rubber ends ,you put that against rad cap opening holding tight ,apply vacuum at top,if you have a leak exhaust fumes turn fluid color.might be eight inches long don't know if there's room to get it on bike

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Re: overheating

Postby brettchallenger » Thu Apr 30, 2015 3:52 am

I presume that you are losing coolant which in turn is leading to overheating. Have you checked the integrity of the hoses? Is there any evidence of crud collecting on the oil dip stick to suggest that the oil is contaminated with coolant? Is there evidence of water vapour coming from the exhaust pipes?

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Re: overheating

Postby raven41951 » Thu Apr 30, 2015 1:01 pm

This works for cars and should work here as well, but it only tells you if the head gasket is leaking into the coolant.
You will need a Radiator pressure tester (may require adapter to fit)

With the engine cold (overnight), install the tester and start the engine.

An immediate pressure increase indicates the head gasket is leaking to the coolant. After the engine warms up, if there is a leak it could seal up due to the expansion.

This does not mean if there is no pressure increase then head gasket is good, it could still be leaking into the oil/sump. Previous posts may help there.

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Re: overheating

Postby billcrawford » Thu Apr 30, 2015 1:11 pm

there are no water leaks except when it reaches hot, it blows up. if radiator cap is on then it blows the top off the overflow tank. if the rad cap is off it projectile water out the rad fill hose seems to be under a lot of pressure. i think the sudden expulsion is the thermostat opens. no residue in oil or any smoke or steam from tail pipe.if it has head gasket problems, could the pressure build up until thermostat opens, then explode?

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Re: overheating

Postby Aussie81Interstate » Thu Apr 30, 2015 4:45 pm

could it be a stuck thermostat - that does not open gradually -

so if the circulating water in the cooling system (no thermostat open) comes up to temp and keeps going it will eventually boil and if the thermostat is stuck and suddenly opens I could see that projectile movement of water out of the radiator neck..

have you checked your thermostat or recently replaced it ?? what has happened recently ?


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Re: overheating

Postby ct1500 » Thu Apr 30, 2015 5:07 pm

What RPM are you running the engine during this time? What is the temp gauge reading when this happens? What is the temp gauge reading when the fans come on? When was the last time the engine was troublefree? What work has been done on it?
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Re: overheating

Postby robb » Thu Apr 30, 2015 5:27 pm

Blown Head Gasket Symptoms:

1.Coolant leaking externally
2.Sweet white smoke from the exhaust pipe.
3.Overheating engine.
4.Bubbles in the radiator or coolant overflow tank.
5.White milky oil.
6.Significant loss of coolant with no visible leaks

Can do a compression test to each cylinder. Remove radiator cap and look for bubbles in water.
Napa sells a test kit: Part Number: BK 7001006

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Re: overheating

Postby dale miller » Tue May 10, 2016 9:14 am

Busted water pump plate
Busted water pump plate
I snowbird in Fl.during the winter,after hauling my 84 Goldwing back to Tn in April, my bike started overheating.
I Removed,reservoir,radiator,thermostat checked everything carefully.
Did not my find any problem but purchased new radiator cap and thermostat at NAPA,assembled and refilled. I started,checked for leaks all looked good,so took for test ride after 20 miles, I smelled antifreeze,then overheating began,got back home,very low on coolant. I could not find any leaks. I did compression test, checked good,so suspecting water pump,removed front plate to my surprise,the plate fell off in pieces.I must have busted the plate when loading. When at normal operating temp it was loosing coolant. These old bikes are tough but they need TLC like a lady.

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Re: overheating

Postby redial » Thu May 12, 2016 1:38 am

Another suggestion - has the radiator been flushed? If the core is blocked, you may not have enough coolant for the engine to be cool.
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Re: overheating

Postby dale miller » Sun May 15, 2016 6:11 pm

I installed used water pump cover,filled with coolant,when I started the engine,coolant was bubbling,bad head gasket.I purchased oem gaskets at Honda,replaced both head gaskets and oil orings,it took me 8 hours to do this job,the bike now runs great.
This past month I rebuilt the carbs with oem kits from Honda,have spent about 300.00$ total for carbs and head gaskets.If I had not done all the work myself,shops would have charged more than the old bike is worth.Hopefully I can ride for a few more years without anymore problems.

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