1978 Gl1000 almost ready to give up. Help


Information and questions on GL1000 Goldwings (1975-1979)
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Kbkc2002
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Motorcycle: 1978 Honda Goldwing GL1000

1978 Gl1000 almost ready to give up. Help

Post by Kbkc2002 »



I have been working on my 1978 honda goldwing
Final finished putting new gaskets throughout the engine and resurfaced the heads. Reseated the valves put it back together and did a compression test.
Cylinders 1 & 3 years 150
Cylinder 2 120
Cylinder 4 30
Please help I have no idea what I have done wrong


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winguyjo
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Re: 1978 Gl1000 almost ready to give up. Help

Post by winguyjo »

ouch, that's gotta hurt after doing all that work. you say you "re-seated" the valves ... can i assume that means you lapped them ? if so, have you checked the valve lash ? if so,

my next move would be to find out where the compression is going on number 4. a leakdown test will tell.
Kbkc2002
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Re: 1978 Gl1000 almost ready to give up. Help

Post by Kbkc2002 »

I did lap them, I am a little green when it comes to leakdown tests. How is thqt done.
Thanks for the help
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Rambozo
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Re: 1978 Gl1000 almost ready to give up. Help

Post by Rambozo »

Bring the cylinder up to TDC, pump air into the cylinder through the spark plug hole. There is a tool with a gauge that will tell you the actual leakage, but even without that, you can locate where the air is coming out to identify the problem area. Listen at the intake, to check the intake valve, the exhaust to check the exhaust valve, the crankcase to check the rings, the radiator to check for gasket or block/head failures.
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winguyjo
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Re: 1978 Gl1000 almost ready to give up. Help

Post by winguyjo »

if you have any trouble running a leakdown test, youtube is an excellent resource. the tool itself will cost you some $$ but if working on internal combustions is going to be your hobby, it's a well worth the investment. on youtube you can even learn how to put one together from bits and pieces if you have a decent hoard going on :oops: .
Kbkc2002
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Re: 1978 Gl1000 almost ready to give up. Help

Post by Kbkc2002 »

Thank you for your help
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landisr
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Re: 1978 Gl1000 almost ready to give up. Help

Post by landisr »

Auto Zone or O Reillys might have them to 'loan'.

Ron in AZ
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landisr
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All miles are mine

Re: 1978 Gl1000 almost ready to give up. Help

Post by landisr »

Auto Zone or O Reillys might have them to 'loan'.

Ron in AZ
I'm not so sure about an inner child, but I have an inner idiot that surfaces every now and then.. :mrgreen:

Avatar taken at the Pine Breeze Inn, famous from Easy Rider.
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DenverWinger
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Re: 1978 Gl1000 almost ready to give up. Help

Post by DenverWinger »

Easy enough to make one if you or a buddy has a welder, I took an old sparkplug, smashed the porcelain guts out of it and welded the metal sparkplug shell to the end of a short piece of pipe. then welded an air hose chuck fitting to the other end.


When you bring a cylinder up to TDC, if it won't hold any pressure at all you probably have the "wrong" TDC (between intake/exhaust strokes). Rotate the crank one full rev and bring up to TDC again, this should be top of the compression/power stroke.
A local inventor has figured a way to turn a sausage grinder backward to manufacture pigs. :lol:

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Rambozo
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Re: 1978 Gl1000 almost ready to give up. Help

Post by Rambozo »

You can also often use the hose from your compression tester. Just remove the schrader valve in the end, so air can flow the other way.


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