Head Gasket


Information and questions on GL1200 Goldwings (1984-1987)
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dodge
Posts: 26
Joined: Tue Jun 28, 2011 8:17 pm
Location: Maumelle,AR.
Motorcycle: 1984 GL1200I Goldwing, 1982 GL1100 Standard

Head Gasket

Postby dodge » Thu Dec 11, 2014 10:25 pm



The other day after riding a bit, long enough to get to operating temp, I pulled back into garage and noticed steam coming from engine. Upon closer inspection I discovered some coolant pooled on top of the block just back of #4 carb. There was some collected on #4 cylinder exhaust header as well. The head gaskets were changed some four or five thousand miles ago but I fear the side in question is blown. Will a compression check on that side tell me anything about the gasket? I will look at spark plug as well to see if appears to be washed clean. Any other trouble shooting tips would be appreciated.



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alanc1100
Posts: 71
Joined: Thu Aug 26, 2010 4:51 am
Location: Lakewood, Wa.
Motorcycle: 1986 GL1200A Aspencade

Re: Head Gasket

Postby alanc1100 » Fri Dec 12, 2014 2:18 am

Dodge,
Yes, a compression test will help. Also, check the radiator cap. Make sure it is maintaining pressure. Relief pressure is between 10.7 - 14.9 psi. So it should be holding pressure up to relief.

Check the oil for coolant contamination and coolant for oil contamination. If everything is good, check the cylinder head core plugs and the valve train for evidence of coolant leakage. At that point, if all is good, then remove the head and check/replace the gasket.

That is about all I can think of at the moment. Let us know what you find.
Alan

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virgilmobile
Posts: 7645
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Head Gasket

Postby virgilmobile » Fri Dec 12, 2014 12:05 pm

If I remember right...on top of the engine..dead center is the coolant assembly.It houses the thermostat,temp sensor,fan switch and 2 "O" ring sealed pipes that carry coolant to each head.
I'd be inclined to look at the O ring joint first.Aluminum will oxidize and let coolant past the O ring.

dodge
Posts: 26
Joined: Tue Jun 28, 2011 8:17 pm
Location: Maumelle,AR.
Motorcycle: 1984 GL1200I Goldwing, 1982 GL1100 Standard

Re: Head Gasket

Postby dodge » Fri Dec 12, 2014 5:54 pm

Thanks for info, when head gaskets were changed we didn't have gaskets for standpipes on either side so we reused old gaskets with sealer. Bike has not overheated or gotten close so maybe the #4 pipe side is leaking, will check. Does seem possible because of the location of the puddle.

dodge
Posts: 26
Joined: Tue Jun 28, 2011 8:17 pm
Location: Maumelle,AR.
Motorcycle: 1984 GL1200I Goldwing, 1982 GL1100 Standard

Re: Head Gasket

Postby dodge » Sun Dec 14, 2014 8:07 pm

Finally got around to checking compression. All cylinders 1 thru 3 were just under 180 cold with throttle wide open Number four was around 150 and that is where the coolant had gathered on the exhaust header. This would be an indication of a gasket problem or something else? I had noticed that it had lost some power on smaller hills in fifth gear. I will pull the head when my gasket set comes in see what's what. I will also change o rings and gaskets on stand pipes. Any other thoughts from anyone?

dodge
Posts: 26
Joined: Tue Jun 28, 2011 8:17 pm
Location: Maumelle,AR.
Motorcycle: 1984 GL1200I Goldwing, 1982 GL1100 Standard

Re: Head Gasket

Postby dodge » Sun Dec 14, 2014 8:08 pm

I for got to relay info about oil and coolant, all seemed normal and nothing seemed contaminated.




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