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Returned from a 300 mile run and noticed a slow steady drip of black oil coming from my breather hose. What does this mean?
R.P.Muise 1994 Breakaway/Cummins 5.9/Allison transmission/Spartan Chassis
Try just cleaning the breather. Maybe it is so dirty it just is dripping the old build-up when it is warm.
I don't know Cummins engines very well. I'd guess that unless you have a vacuum leak, the breather hose is not pulling that oil from elsewhere. Can you locate the source of the original leak? Could it be a valve cover gasket?
Oil mist from the breather tube is normal. It will increase as the engine miles add up.
A simple catch can will prevent oil drips on your driveway but will need to be cleaned from time to time.
Or go with a Walker Air-Sep system.
1993 34 Regency WB
8.3 Cummins 300HP
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