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Engine ran without cover on Onan 15JC


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  #21  
Old 03-18-2017, 07:24:17 PM
Leon N. Leon N. is offline
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Default Re: Engine ran without cover on Onan 15JC

In post 8, what is milkshake oil? Sounds like you had water in the oil. Not good.
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  #22  
Old 03-18-2017, 10:21:00 PM
bowser22 bowser22 is offline
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Default Re: Engine ran without cover on Onan 15JC

I did have water in the oil. I drained it and flushed the crank case with fresh oil. Then I popped off the rocker boxes and cleaned the sludge out from them. This thing was neglected before I got it. I can only look forward
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  #23  
Old 03-19-2017, 01:01:04 AM
Leon N. Leon N. is offline
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Default Re: Engine ran without cover on Onan 15JC

Sludge!!! Beware!! That is make sure that external oil line to the valve cover is not plugged or you will do damage to the over head valves and valve guides. When the machine is running make sure that oil line just behind and above the oil filter gets HOT to the touch. IF it does not, you best clean it out and also the piping under the valve cover. Good Luck.
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Old 03-19-2017, 01:14:52 AM
nothingbutdarts nothingbutdarts is offline
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Default Re: Engine ran without cover on Onan 15JC

If not mentioned already, it would not be a bad idea to clean out the crankcase breather also. There might still be condensation in there as well.
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Old 03-19-2017, 03:05:50 AM
JohnnyC JohnnyC is offline
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Default Re: Engine ran without cover on Onan 15JC

The JC has a pcv valve that may need attention. It is located under one of the valve covers near the intake manifold. Clean it good or replace it.

JohnnyC
New Jersey
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