GL1100 Cylinder lubrication


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moffat
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GL1100 Cylinder lubrication

Postby moffat » Fri Aug 12, 2011 10:00 am



Why does the left hand cylinders require lubrication via the two left hand con rods by oil which comes out through holes in the top big end shells. This oil comes out of the big end shells through the hole in the con rod whilst the shells on the right hand side have no oil holes in so no lubrication for the right hand side cylinders.
Is it that there is enough " splash" lubrication on the right and not enough "spalsh" on the left. If I fit shell with oil holes in them for the right cylinders will it affect the overall oil pressure. Any ideas???



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moffat
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Re: GL1100 Cylinder lubrication

Postby moffat » Sat Aug 27, 2011 1:54 am

Well 56 people have had a look at my question but no answers? So I have just put it all back together and have decided not to be too curious in the future!!

dan1951
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Re: GL1100 Cylinder lubrication

Postby dan1951 » Sat Aug 27, 2011 9:48 am

I was very curious as You, Years back when helping a friend with His 1200 and noticed the holes on the left bank connecting rods and bearing shells. We ask numerous mechanics about this, No one had the same answer, But most had the same conclusion as You that this side of the engine cylinder 2&4 had less crank splash as the other. Sorry I have no other logical explanation. As for doing the same to the other side I would advise against it. Take care. Dan

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Re: GL1100 Cylinder lubrication

Postby WingAdmin » Sat Aug 27, 2011 10:17 am

I was curious as well, and was hoping someone had the answer. You would think that there would be MORE splash on the left, with the crank turning and lifting oil to the left - but Honda engineers know more about it than I do, and it's seemed to have worked fine for the last 30-odd years, so I wouldn't mess with it. :)

dan1951
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Re: GL1100 Cylinder lubrication

Postby dan1951 » Sat Aug 27, 2011 10:41 am

It slipped My mind on the last reply, But one Honda mechanic told us that those passages lubed all four cylinder walls while rotating.

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RoadRogue
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Re: GL1100 Cylinder lubrication

Postby RoadRogue » Sat Aug 27, 2011 11:47 pm

My 59 BSA also has one side with drilled shells and the other not,If there is no matching hole in the con rod the oil has no place to go so you should be OK. Better to put a drilled shell in where its not needed than to put in a plain undrilled one where you should have a drilled one
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moffat
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Re: GL1100 Cylinder lubrication

Postby moffat » Sun Aug 28, 2011 12:12 pm

Thanks for the interest goldwings docs.com is great resource and I am really pleased to be part of it.
I have put the engine back together as per the manual. Its interesting that the big end bearing are different on cylinders 1 and 3 than 2 and 4 and it seems deliberate as the parts manual show the difference in the shells -which is the two right hand cylinders have upper big end shells with no oils holes in yet the two left hand cylinders have holes in the upper shells to suply oil to the cylindersd via the oil way in the connecting rods. I was tempted to drill holes in the right hand shells but refrained from doing so as both the Haynes and the Honda manual mention the difference in the big end shells.
I suspect that all con rods have the oil way probably as part of the manufacturing process but only the left hand ones vertically supply oil to the cylinders- A bit of a mystery but as it has been OK for 29 years it will be left as per standard. Out of interest I have replaced all mains and big end bearings as well as piston rings after having the damaged left hand side cylinders re sleeved by a specialist engine repairer. The HYVO chain had 25mm slack in it so that has been also repalced along with lots of other bits and pieces and yes the vacuum operated ignition timing unit was siezed solid which seems par for the course.

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moffat
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Re: GL1100 Cylinder lubrication

Postby moffat » Sun Sep 04, 2011 3:54 am

Just to finish this with a positive response. Its back together and actually started at a touch of the starter button which was scary but good. All works well but an expensive exercise. Thanks for the input.




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