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gl1100 smoking oil - corrosion on cylinders?

Posted: Tue Aug 14, 2018 7:59 am
by @di
Dear All,

I got my bike from a big overhoul, trying to fix the problem - the Wing was loosing oil - about 1 quart per 1000km.

So I did the overhaoul, my mechanic fixed all outside leakages, he changed the right head gasket and changed the valves sealings also on the right side.

He told me that during his check he found out that there are some pittings on the cylinders' surfaces (right side), and in his opinion this causes oil losing.

After his repair I see that there is an oil smoke from the left side (the one he did not touch), so I'm quite confused. He told me that the best way is to sell the machine because of those pittings and conected this phenomena with it oil loosing.

Of course I'll not sell the Wing, I'm rather thinking of changing the Wing's heart for the better on, but I'd like to ask you some questins - if you heard about this kind of use on the Wing? (Maybe it was left for a few years in a bad conditions??) Is there any other way of repairing the cylinders??? Unfortunatelly I've not seen the pittings.

I've done the compression check on all cylinders by myself and it's good - is it possible that with this level of oil burn the compression is OK???

Thank you for any help in advance.

Adrian.

Re: gl1100 smoking oil - corrosion on cylinders?

Posted: Tue Aug 14, 2018 8:03 am
by RBGERSON
No simple way to fix pitting. If compression good 140 or above and even ..I'd ride it and add oil as needed..easiest fix is to swap the engine out.

Re: gl1100 smoking oil - corrosion on cylinders?

Posted: Tue Aug 14, 2018 8:11 am
by @di
Thank you.

Compression is more or less the same on each cilinder = 150 psig on each, there was a +- 2 psig diference between the cylinders.

Re: gl1100 smoking oil - corrosion on cylinders?

Posted: Wed Dec 12, 2018 12:31 am
by tomos
Hello,most likely problem is that valve seals on left side are gone.Check out spark plugs and if you see black soth on left side spark plugs and normal colour(ten or greish)on right side spark plugs you can be shore that smoke has been coused by burning oil.
If left side is clear as new spark plug, then head gasket on left side is gone.
This is a simple procedure to make preliminary diagnosis.
Hope this will help.
Regards Zoran

Re: gl1100 smoking oil - corrosion on cylinders?

Posted: Wed Dec 12, 2018 10:39 am
by Rednaxs60
You need to determine the most likely source of the oil loss before tearing the engine apart, or replacing it. Easy to do work, replace parts and not get to the problem.

You can also do a leak down test that compliments the compression test. It will tell you if there is excess leakage in the valves and/or piston rings that can contribute to oil burn.

If you don't get an appreciable amount of air leakage past the rings then the pitting in the cylinder is not something to worry about, nor will there be a lot of "blow by" and oil going out the exhaust.

Check the crankcase ventilation system as well. If this is not working properly you can force oil out of the crankcase as well.

Do these and the other recommended checks first before you start changing parts and engines. To change the valve seals you have to take quite a lot of items off.

Hope this helps. Good luck.