Subaru PCV Hose Redesign
Always order the most up-to-date replacement parts based on the specific model.
PCV System DTC
PCV systems are far more complex now, but they are also much better at controlling crankcase pressure.
Check the PCV Valve If You Suspect Oil Fouling
The overriding task of the internal-combustion engine is a straightforward one: provide the requisite amount of power needed to propel the vehicle down the road at a prescribed speed, measured in miles per hour. Achieving this goal, however, requires all of the components in a delicate ecosystem to operate in perfect harmony, culminating in the
VIDEO: Why Checking The PCV System is Critical to Curing Gasket Leaks
Andrew Markel explains how a gasket that comes in contact with crankcase vapors can cause an oil leak, and how you can test pressure and vacuum with the right tools. Sponsored by MAHLE.
Turbocharging: Managing Pressure In The PCV System
Crankcase vapors are routed through the positive crankcase valve (PCV). The PCV valve is a simple spring-loaded valve with a sliding pintle inside. The system allows the vapors to be siphoned into the engine using engine vacuum.
PCV Valve Facts
The first vehicle to get a positive crankcase ventilation (PCV) valve was the M5 Stuart tank in WWII, which was made by Cadillac. The valve replaced draft tubes that might suck water into the engine while crossing rivers.
PCV Valves: The Key To The Positive Crankcase Ventilation System
The major component in the Positive Crankcase Ventilation (PCV) system is the PCV valve, a simple spring-loaded valve with a sliding pintle inside. The pintle is tapered like a bullet so it will increase or decrease airflow depending on its position inside the valve housing. The movement of the pintle up and down changes the
Tech Tip: Don’t ‘Blow By’ PCV Inspections
Most emission control parts, like the PCV valve, require little if any scheduled maintenance, but replacement may be necessary if the Check Engine light is on, the vehicle has failed an emissions test or is experiencing a driveability problem. Other emission control components include the exhaust gas recirculation (EGR) valve, the evaporative emission control system (EVAP) vapor canister and purge valves, the catalytic converter, oxygen sensors and all of the engine’s other engine management sensors.
Tech Tip: Mysterious Leaking Engine Oil Seals On Subarus? Check the PCV!
The Mitchell 1 Techline has heard of a very limited number of cases involving engine oil seals leaking after being displaced from their normal positions. As the engine heats and cools, condensation can accumulate in the PCV system, which, in extreme cold, can eventually turn to ice. Upon closer inspection, technicians have reported finding accumulations
PCV Valve Maintenance Tip Clip
In this tip clip from the Quick Check Diagnostics class, instructor Jim Wilson talks about some simple test you can perform to verify proper functionality of the PCV valve. He goes on to discuss what to watch out for and how fuel trim can be effected.
This clip is an excerpt from the 220 minute comprehensive “Quick Check Diagnostics” with Jim Wilson, available from Automotive Video.