Valve job on my 1976?


Information and questions on GL1000 Goldwings (1975-1979)
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Tamredfox
Posts: 6
Joined: Mon Feb 06, 2017 11:44 am
Location: Loveland CO
Motorcycle: 1976 GL1000

Valve job on my 1976?

Post by Tamredfox » Thu Dec 26, 2019 1:01 am



There are slightly less than 50 k miles showing.
Compression at 120-125 psi all cylinders cold. Test repeated, results the same. Valve clearance correct. Results repeat after engine oil added to all cylinders and with a different compression gage. Approximately ten minutes of smoke from left exhaust after being parked for lunch.
Bike runs great even at 12000 feet.
Is it time for a valve job, if so where are good sources for valve guides, seals ,valves and gaskets?
Thanks in very much in advance for any info
Tammy



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newday777
Posts: 1471
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH summer/fall & Oceanside, CA winters(N San Diego) with lots of miles riden between
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry 36,000 miles

1975 CB750 K5 Planet Blue 7,800 miles

1976 CB750 K6 Anterris Red 25,000 miles

Past rides
1999A Restored from PO neglect & sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Valve job on my 1976?

Post by newday777 » Thu Dec 26, 2019 8:20 am

The smoking for 10 minutes sounds more like a head gasket on it's way to blowing. It's is probably leaking antifreeze into a cylinder. Check your spark plugs for one or both being cleaner looking than the others.
Does it crank over slower when it is cold than after the smoke clears? Does the smoke smell sweet? Those are tell tale signs.

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Joneszy
Posts: 95
Joined: Sat Jun 24, 2017 10:27 pm
Location: Manitoba Canada
Motorcycle: 1983 GL1100A Aspencade Stripped
1999 Valkerie CT
1978 Gl1000 project bike

Re: Valve job on my 1976?

Post by Joneszy » Thu Dec 26, 2019 2:34 pm

I wouldn't suspect a valve job is in your future but I am not a motor guru.
-Is the smoke bluish, black or white? Blue oil burn, white coolant or black flooding a bit?
-Could be a valve guide or seal allowing oil to bypass when shut down.
-Was it parked on the side stand or center stand over lunch. Maybe try it on the center stand if was left on the side stand you may be experiencing a bit of the gl left cylinder smoke problem. I have had this multiple times in the past but after it clears up there is no problem after that.
-Are you checking compression with throttle held wide open?
-What were the plugs like when you pulled them to do the compression test.
-I usually park it at home on the center stand (greatly reduces left bank smoking on start up) and on the side stand if stopping for a burger or whatever.
Just a couple of quick thoughts

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