New Cylinder Heads


Information and questions on GL1100 Goldwings (1980-1983)
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Clay3Weil
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Location: Dodge City Kansas
Motorcycle: 1981 Honda Goldwing 1100

New Cylinder Heads

Post by Clay3Weil » Mon Mar 26, 2018 8:45 am



I found cracks in the heads that came in my 81 Gl 1100 I recently bought. tried everything under the sun to seal the old ones and nothing worked so I went ahead and ought a set off ebay. ($125) for the pair. Will I need new gaskets for the new ones and will they need to be resurfaced?



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ekvh
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Location: Grand Forks, ND
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Re: New Cylinder Heads

Post by ekvh » Mon Mar 26, 2018 3:13 pm

You’ll need new head gaskets (1 per side) and the O-rings for the oil orifices, (2per side). A lot of people use only OEM Honda headgaskets after a rash of early failures in aftermarket brands. It would be wise to replace the cam seals(3) and the valve seals. If you do the valve seals you may as well lap the valves too. It wont hurt to resurface the heads, but a good flat edge will tell you. I think the tolerance is 0.004” lengthwise and 0.002” the short way.

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Hoosier Jack
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Location: Terre Haute, IN
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Re: New Cylinder Heads

Post by Hoosier Jack » Mon Mar 26, 2018 7:24 pm

Too bad that I didn't know about the heads, I have four. I agree with machining the heads flat since it is very good insurance against gasket leaks. Most people do suggest the Honda head gaskets but I have used aftermarket ones with success. I use copper gasket sealer as well.

This is a good time to look at the valve seals and the springs. Why not, everything is off the bike. Leak test the valves as well.

Clay3Weil
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Motorcycle: 1981 Honda Goldwing 1100

Re: New Cylinder Heads

Post by Clay3Weil » Tue Mar 27, 2018 8:35 am

Hoosier Jack wrote:
Mon Mar 26, 2018 7:24 pm
Too bad that I didn't know about the heads, I have four. I agree with machining the heads flat since it is very good insurance against gasket leaks. Most people do suggest the Honda head gaskets but I have used aftermarket ones with success. I use copper gasket sealer as well.

This is a good time to look at the valve seals and the springs. Why not, everything is off the bike. Leak test the valves as well.
how would you go about leak testing the valves? and I haven't bought gaskets yet if your wanting to get rid of a set!

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Stew
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Re: New Cylinder Heads

Post by Stew » Tue Mar 27, 2018 9:04 am

A quick way would be to set the heads on something so they're level with the combustion chambers facing up. Fill the combustion chamber with isopropyl alcohol, if it hasn't leaked out after some period of time the valves are sealing pretty well. Google probably has much better steps to follow.
Winging it every chance I get 8-)

19,119 miles when I got it from dad Oct 15, 2017 --- 26,975 miles and counting as of Aug 15, 2019!

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Hoosier Jack
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Re: New Cylinder Heads

Post by Hoosier Jack » Tue Mar 27, 2018 12:14 pm

That is pretty much it Stew.

Clay3Weil
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Re: New Cylinder Heads

Post by Clay3Weil » Tue Mar 27, 2018 4:56 pm

Hoosier Jack wrote:
Tue Mar 27, 2018 12:14 pm
That is pretty much it Stew.
Where did you find aftermarket gaskets? I've looked all afternoon and cant seem to find any?

imboot
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Re: New Cylinder Heads

Post by imboot » Tue Mar 27, 2018 7:37 pm

After market gaskets can be bought from e-bay just watch what you buy as there are junk suppliers as well as quilty ones reminder if you get a $250.00 gasket set for $50.00 it is probably junk

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brianinpa
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1987 GL1200 Interstate

Re: New Cylinder Heads

Post by brianinpa » Tue Mar 27, 2018 8:57 pm

Spend the extra $ and buy OEM gaskets. Western Honda is worth it...
Brian

If you aren't having fun doing it, find something else to do.

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ekvh
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Re: New Cylinder Heads

Post by ekvh » Tue Mar 27, 2018 10:03 pm

Last time I bought from Western Honda, they were $41 each. Not too much more than the aftermarket ones. I have run both and run copper gaskets. I blew the aftermarket ones out, then a set of oem. The copper ones contain the combustion chamber but have annoying oil leaks. Small but annoying.

Clay3Weil
Posts: 14
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Location: Dodge City Kansas
Motorcycle: 1981 Honda Goldwing 1100

Re: New Cylinder Heads

Post by Clay3Weil » Wed Mar 28, 2018 9:18 am

ekvh wrote:
Tue Mar 27, 2018 10:03 pm
Last time I bought from Western Honda, they were $41 each. Not too much more than the aftermarket ones. I have run both and run copper gaskets. I blew the aftermarket ones out, then a set of oem. The copper ones contain the combustion chamber but have annoying oil leaks. Small but annoying.
Where would I find the copper ones?



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