Lucas oil stop leak for valve seals


Information and questions on GL1100 Goldwings (1980-1983)
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Wingnut137
Posts: 10
Joined: Mon Nov 18, 2019 9:03 pm
Location: Bowling Green KY
Motorcycle: 1983 gl1100i

Lucas oil stop leak for valve seals

Post by Wingnut137 »



Has anyone ever used a little lucas oil stop leak on valve seals? I got an 83 gl1100i with 21,000miles white smoke on startup, goes away after a bit. I just changed the spark plugs, the previous owner kept the bike outside with a cover. There was a little rust on plugs 1 and 2, when I removed the plugs 2 and 3 were oily. Looks like I have a combination of a rich idle, slight leak on valve stem seals and a bit of miss fire due to poor connection. Thoughts?


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newday777
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1983 GL1100A Wineberry 36,000 miles

1975 CB750 K5 Planet Blue 7,800 miles

1976 CB750 K6 Anterris Red 25,000 miles

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Re: Lucas oil stop leak for valve seals

Post by newday777 »

Never put any stop leak in. You can plug oil ports and fry the heads.
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winguyjo
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Motorcycle: wing1 : 1982 gl1100 interstate; resurrection complete. SOLD
wing2 : 1980 gl1100 interstate; resurrection complete. SOLD.
wing3 : 81gl1100i frame/82gl1100a engine/81cb900 bits. resurrection complete. naked. SOLD.
wing4 : 1977 gl1000 black w/ blue pinstripes; resurrection complete. SOLD
wing5 : 1977 gl1000 black w/gold pinstripes; nearly roadworthy when purchased, NOW RIDING.
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Re: Lucas oil stop leak for valve seals

Post by winguyjo »

white smoke is coolant burning. smoke with a faint blue tinge is oil burning. worn valve seals will cause blue smoke, mostly at start-up.

a vehicle that has been sitting a long time often develops hardened valve seals which will allow oil to seep past into the combustion chamber. in my experience some run time will often significantly improve this issue.

as stated, magic goo would likely cause more harm than good.

how long was this bike sitting unused ? does it have old gas in it ? other than spark plugs,what have you done to it since you have owned it ?
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Wingnut137
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Joined: Mon Nov 18, 2019 9:03 pm
Location: Bowling Green KY
Motorcycle: 1983 gl1100i

Re: Lucas oil stop leak for valve seals

Post by Wingnut137 »

I got the bike at the end of October and only put about 30 miles on it over winter besides starting it and letting it warm up every so often. The owner before me had the bike a little over a year and only put about 1000miles on it. He sold it because he had no time to ride it, and no garage to store it in, he kept it covered. Im not sure how when the last time he rode it before i got it was. he put fresh gas in the tank before selling to me. I changed the plugs because some moisture caused some very light rust on the engine around cylinder 1 and 2. I did an oil change with some added seafoam. Just changed the oil again with nothing added, noticed during the change the oil from the first change I did was grey as others have spoke of happening when adding seafoam.

The smoke does have a slight blue tint. I have attached pics of each of the plugs when I got it. After a lot of reading on this forum I do believe the valve stem seals could probably be replaced. The smoke does go away after a bit. I know I read where some of the smoke is going to always be there because of oil leaking past the pistons due to the boxer design.

Everything on the bike is in great shape, just needs some basic up keep.
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winguyjo
Posts: 413
Joined: Sat Aug 11, 2018 9:26 pm
Location: b.c. Canada
Motorcycle: wing1 : 1982 gl1100 interstate; resurrection complete. SOLD
wing2 : 1980 gl1100 interstate; resurrection complete. SOLD.
wing3 : 81gl1100i frame/82gl1100a engine/81cb900 bits. resurrection complete. naked. SOLD.
wing4 : 1977 gl1000 black w/ blue pinstripes; resurrection complete. SOLD
wing5 : 1977 gl1000 black w/gold pinstripes; nearly roadworthy when purchased, NOW RIDING.
wing6 : 1975 gl1000 blue; SOLD

Re: Lucas oil stop leak for valve seals

Post by winguyjo »

definitely some oil-fouling on 1 and 2. 3 and 4 aren't too pretty either.
i would check compression, put some miles on the bike, then check compression again.
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Wingnut137
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Location: Bowling Green KY
Motorcycle: 1983 gl1100i

Re: Lucas oil stop leak for valve seals

Post by Wingnut137 »

Went out to the garage this morning, after riding about 40 miles around town yesterday. Had the bike parked on the center stand and there was oil on the floor. Looks like it leaked out of the left tailpipe. looks like valve seals on 2 will need to be replaced. Of the plugs 2 looks the worst.
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Wingnut137
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Location: Bowling Green KY
Motorcycle: 1983 gl1100i

Re: Lucas oil stop leak for valve seals

Post by Wingnut137 »

After further investigation turns out the I'll was from the rear shock not the exhaust.


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