Clogged crankcase ventilation systems often are overlooked causes of engine oil leaks. Savvy service personnel keep these systems at the top of their mental checklists for solving oil leaks. I'll ...

The PCV (Positive Crankcase Ventilation) system is designed to regulate and remove fumes from the engine crankcase, and to alleviate crankcase pressure which could cause oil leaks or seal damage. The ...

Every engine has some sort of crankcase breathing system. The internal combustion process creates pressure, some of which makes its way past the piston rings-along with fuel vapors-and into the rest ...