Video: 2007-2013 Toyota Corolla How to check and clean the PCV engine valve Yiannis Pagonis

OEM Part Number for Valve Sub-Assembly, Ventilation 12204-22051 OEM Part Number for Hose, Ventilation, No.2 12262-0D080, 12262-22060 OEM Part Number for Clip Or Clamp (For Ventilation Hose) 90467-13103, 90467-19003 When your engine is running thousands of powerful explosions take place to release the fuel’s energy, producing highly toxic and harmful gases. PCV Valve-After each combustion process, the exhaust valve routes these gases into the exhaust system where the catalytic converter turns them into much less toxic fumes before releasing them into the atmosphere. Still, a small amount of the gases in the combustion chambers find their way into the crankcase (engine block) by way of pressure leakage between the piston rings and the cylinder wall. Consequently, Left on their own, these vapors and fumes will play havoc with your engine. Blow-by gases contain hydrocarbons (unburned fuel), carbon monoxide (partially burned fuel), particulates, water, sulfur, and acid. Also, Together, these substances will corrode any engine metal component they touch, dilute engine oil, build up harmful sludge that accelerates parts wear, and plug small passages and hoses. So, In 1961, the PCV system was introduced to deal with this problem. As a result, This simple emission control system uses engine vacuum to pull blowby gases out of the crankcase, pushing them down the intake manifold and back into the combustion chambers where they are reburned. The PCV system will fail with poor system or engine maintenance. Signs of a Bad PCV Valve You don’t realize how important the PCV system is to the well being of your engine until you understand how a failed PCV valve—or any part of this system—disrupts engine performance and internal components. A bad PCV valve or related component can produce a number of symptoms. For example, if the valve gets stuck in the closed position or clogs, you’ll notice one or more of these symptoms: Increase in internal engine pressure Failure of one or more oil seals or gaskets Engine oil leaks Moisture and sludge buildup inside the engine Engine surges and possibly black smoke If the PCV valve gets stuck open, or a system hose gets disconnected or ruptured—producing a vacuum leak—you’ll notice one or more of these symptoms: Engine misfires at idle Lean air-fuel mixture Presence of engine oil in PCV valve or hose Increased oil consumption Hard engine start Rough engine idle In addition, a PCV valve stuck open can trigger the “check engine” light due to increased air flow. However, a diagnostic computer may point to a Mass Air Flow or Oxygen Sensor failure instead, making it harder for you to detect the real source of the problem.