Pcv Valve Under Boost. i would put a check valve on the pcv valve, and run an inlet to the crankcase from pre boost (near the air filter). This is a good thing, because when an engine burns fuel, a tiny amount of gases slip by the piston rings and into the crankcase. Under boost, the intake tube pulls a slight vacuum onto the crankcase, and the pcv valve attempts to prevent boost pressure from entering the crankcase. most boosting kits will add a dedicated check valve if the factory pcv is not sturdy enough to resist boost pressure, but this only prevents us from adding to the existing crankcase. I think this is the *proper* way. without the pcv valve, there may be too much underpressure in the crankcase during idle and too much. the problem is, when the pcv system fails, and allows positive pressure (boost) to go from the intake manifold back. a pcv (positive crankcase ventilation) valve is part of the engine's breather system, and it helps to stop damaging pressure building up in the crankcase. the pcv valve meters the flow of air on the crankcase, getting a fresh air source via the valve cover to intake connection.
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the pcv valve meters the flow of air on the crankcase, getting a fresh air source via the valve cover to intake connection. Under boost, the intake tube pulls a slight vacuum onto the crankcase, and the pcv valve attempts to prevent boost pressure from entering the crankcase. a pcv (positive crankcase ventilation) valve is part of the engine's breather system, and it helps to stop damaging pressure building up in the crankcase. I think this is the *proper* way. without the pcv valve, there may be too much underpressure in the crankcase during idle and too much. the problem is, when the pcv system fails, and allows positive pressure (boost) to go from the intake manifold back. This is a good thing, because when an engine burns fuel, a tiny amount of gases slip by the piston rings and into the crankcase. i would put a check valve on the pcv valve, and run an inlet to the crankcase from pre boost (near the air filter). most boosting kits will add a dedicated check valve if the factory pcv is not sturdy enough to resist boost pressure, but this only prevents us from adding to the existing crankcase.
Change the PCV valve every 30K miles Kia Soul PCV valve Replacement
Pcv Valve Under Boost the problem is, when the pcv system fails, and allows positive pressure (boost) to go from the intake manifold back. a pcv (positive crankcase ventilation) valve is part of the engine's breather system, and it helps to stop damaging pressure building up in the crankcase. This is a good thing, because when an engine burns fuel, a tiny amount of gases slip by the piston rings and into the crankcase. I think this is the *proper* way. most boosting kits will add a dedicated check valve if the factory pcv is not sturdy enough to resist boost pressure, but this only prevents us from adding to the existing crankcase. Under boost, the intake tube pulls a slight vacuum onto the crankcase, and the pcv valve attempts to prevent boost pressure from entering the crankcase. i would put a check valve on the pcv valve, and run an inlet to the crankcase from pre boost (near the air filter). without the pcv valve, there may be too much underpressure in the crankcase during idle and too much. the pcv valve meters the flow of air on the crankcase, getting a fresh air source via the valve cover to intake connection. the problem is, when the pcv system fails, and allows positive pressure (boost) to go from the intake manifold back.
