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Kohler L600, head off, spinning motor, oil oozing past rings


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Old 11-07-2018, 01:48:50 PM
Kenny Crenshaw Kenny Crenshaw is offline
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Default Kohler L600, head off, spinning motor, oil oozing past rings

I am going through an L600 and when I spin the engine over fast without the head on or valves in, there seems to be motor oil appearing/oozing up past the rings on the two center cylinders. I can wipe away the oil, spin it some more, and more oil appears. I do not know the history if this engine, but it seems to have low hours. I do not want to take the generator off to get to the oil pan bolts. What are the chances that there is something wrong with the rings?
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Old 11-07-2018, 03:06:58 PM
I like oldstuff I like oldstuff is offline
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Default Re: Kohler L600, head off, spinning motor, oil oozing past rings

Engines will do that, showing seemingly a lot of oil on the cylinders when rotated. Either pull it apart to inspect the rings or put it together and run it. I say run it and see.
I'll assume the rings aren't stuck to the pistons and the cylinders look ok.
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Old 11-07-2018, 08:36:06 PM
K-Tron K-Tron is offline
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Default Re: Kohler L600, head off, spinning motor, oil oozing past rings

I would pull the piston if at all possible and inspect the rings and the piston skirt. I made the mistake of running an air compressor that sat for 50 years unused outside. When the compression ring finally free'ed up it blew the ring landing off the top of the piston. Three years later I am still looking for a replacement piston. If you can pull the piston in an hours time or less it will be worth the effort. It probably has stuck rings, but you never know with these old engines.

Chris
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Old 11-07-2018, 10:22:59 PM
Vanman Vanman is offline
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Default Re: Kohler L600, head off, spinning motor, oil oozing past rings

The oil base can be removed from the block without removing the generator, giving access to the rod caps and thus allowing the pistons to be removed from the top. Careful with the rings if there is much of a ridge. There is ONE bolt in the center rear essentially between the oil pan and generator that is NOT in the drawings. It screws in from below.
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Old 11-19-2018, 04:20:41 PM
zaphod zaphod is offline
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Default Re: Kohler L600, head off, spinning motor, oil oozing past rings

ANY engine will pool oil on top of the pistons without heads. A certain amount of blowby is present before the rings and piston expand and seal.
Cheers,
Zaphod
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Old 12-02-2018, 12:15:46 PM
dkamp dkamp is offline
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Default Re: Kohler L600, head off, spinning motor, oil oozing past rings

Piston rings don't really seal until there's combustion pressure... so seeing film there shouldn't be a big surprise.

Others will tell you with greater accuracy, but I believe the connecting rod lubrication may be such that flow up the rod to wrist pin then exits to the inside of the skirt. If this is the case, that means your oiling system is working.

How's the sump look? level okay? Oil clean? no water?
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