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JohnF2015, Small Engine Technician
Category: Small Engine
Satisfied Customers: 1140
Experience:  Owner/Service Technician at S & J Small Engines
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My L108 engine is blowing oil back through the breather

Customer Question

My L108 engine is blowing oil back through the breather after about 15 mins of running. It starts fine and runs well then once hot has developed this problem
Submitted: 2 years ago.
Category: Small Engine
Expert:  JohnF2015 replied 2 years ago.

Hi, my name is***** will be assisting you.

The oil is not overfilled?

Customer: replied 2 years ago.
Expert:  JohnF2015 replied 2 years ago.

Since it seems to only happen once the engine gets warm or hot then I would say that you most likely have a head gasket that it blown. This is allowing come of the compression from the cylinder to get into the crankcase and create an internal pressure inside the crankcase which will cause the engine to begin to blow oil back out through the breather assembly.