A CCV filter, or crankcase ventilation filter, isn't unique to the 6.7-liter Cummins engine, but it's also a common feature on the Duramax diesel and Ford's Power Stroke diesel engine.

Racor, a division of Parker Hannifin, now offers closed crankcase ventilation (CCV) heater kits for engines that operate in extreme cold weather conditions. The CCV heater band ...