Internal combustion engine with internal oil heating of blowby gas

An internal combustion engine having a crankcase with a plurality of piston-cylinder arrangements and a valve head positioned above the crankcase at least in part containing a valve train, the internal combustion engine further comprising:

• a head cover coupled to the valve head, the head cover having a blowby outlet formed therein to vent blowby gas flowing from one or more of the plurality of piston-cylinder arrangements;
• and
• a baffle coupled to a bottom side of the head cover and adjacent the blowby outlet, the baffle defining an oil passage internal to the baffle;
• wherein, as engine oil circulates through the oil passage of the baffle, the baffle transfers heat to the blowby gas before the blowby gas exists the valve head through the blowby outlet in the head cover.