GL1500 oil from exhaust port - Steve Saunders Goldwing Forums

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post #1 of 8 (permalink) Old 07-29-2016, 11:16 AM Thread Starter
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Join Date: Jul 2016
Location: Australia
Year: 1990
Make: Honda
Model: GL1500
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GL1500 oil from exhaust port

Hi, new to this forum and live in Australia and wanted to share an issue for some feedback. Just purchased a 1990 GL1500 with very low kms, 25,000. The bike has been stored for the last 15years and not run and I am currently going front to back checking everything, when replacing the timing belts the other day I was hand turning the crank and noticed some drops of engine oil dripping from the exhaust ports (headers currently removed for access to oil seals pipes etc). Pistons and valves all working as they should, bike has compression, I have not started it as yet, anyone offer advice on where that oil might be coming from , only dripping from the middle cylinder on both sides of the bike and only a few drops when hand turning the motor, seems to have stopped now. As far as I know oil was not put in the bores before the bike was layed up as the other four cylinders are dry. Thought it may have something to do with piston seals shrinking over time???
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post #2 of 8 (permalink) Old 07-29-2016, 01:18 PM
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Turning the engine over by hand is not going to pressurize or move any oil through the engine. Whatever came out was probably some leftover residue. Piston seals (rings?) do not shrink.

Keep forging ahead.
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post #3 of 8 (permalink) Old 07-29-2016, 08:37 PM
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Last owner may have fogged the cylinders before storage.
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post #4 of 8 (permalink) Old 07-29-2016, 10:54 PM Thread Starter
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yes I did think about the previous owner who is now not with us and what he might have done to store the bike but the other four pots are dry, you would think that they are would have been the same, looks like I will just have to start it up and see what it does.
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post #5 of 8 (permalink) Old 07-30-2016, 06:32 PM
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Oil pools and drips from the lowest point. Source may be higher up on the motor.

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post #6 of 8 (permalink) Old 07-30-2016, 07:10 PM Thread Starter
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yes I was thinking about that but there is nothing obvious leakings, its stange that it was only coming out the exhaust port when hand turning the motor so it is being pushed out by the piston so can only assume its go something to do with bleeders or oil control rings.
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post #7 of 8 (permalink) Old 07-30-2016, 07:37 PM
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Originally Posted by thaydon777 View Post
yes I was thinking about that but there is nothing obvious leakings, its stange that it was only coming out the exhaust port when hand turning the motor so it is being pushed out by the piston so can only assume its go something to do with bleeders or oil control rings.

Or, it could even be old gasoline that got into open intake valves and gelled, then when the exhaust valve opens...

The stuff that was in my parts bike's fuel system could be easily mistaken for oil. It had that consistency and color.

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post #8 of 8 (permalink) Old 07-31-2016, 03:08 AM
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Originally Posted by Bike...and Dennis View Post
Or, it could even be old gasoline that got into open intake valves and gelled, then when the exhaust valve opens...

The stuff that was in my parts bike's fuel system could be easily mistaken for oil. It had that consistency and color.

I think Dennis could be right. The fact that it is only the middle cylinders could mean some old fuel (as the bike has been stood for years) is finding it's way out of the carb on the shortest route which is the middle arm of the inlet manifold, into the cylinder then out of the lower exhaust port.

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