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Positive Crankcase Ventilation Valve

Powertrain Management › Emission Control Systems
Unified entry — merged from multiple cross-listed pages in the original manual.

Parts

PartPCV Valve
ManufacturerCHY
OEM part #53034065AA
Price$17.75

Labor

Replace0.4 hr
Warranty 0.0 hrSkill C
Procedures
Positive Crankcase Ventilation (PCV) Valve - Installation4 steps
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  1. Check condition of PCV valve rubber O-ring (2).
  2. Clean fitting (2).
  3. Install PCV valve (3) into fitting (2).
  4. Install PCV line (1) and rubber connector to valve.
Positive Crankcase Ventilation (PCV) Valve - Removal2 steps
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  1. Remove line (1) and rubber connector hose from PCV valve.
  2. Unthread PCV valve (3) from metal fitting (2).
Positive Crankcase Ventilation (PCV) Valve - Descriptionreference
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DESCRIPTION A PCV valve (1) using a rubber sealing O-ring (2) is used. The PCV valve is threaded into a metal fitting. The valve (2) is located at the rear of the left cylinder head.
Positive Crankcase Ventilation (PCV) Valve - Operationreference
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OPERATION A typical enclosed crankcase ventilation system is shown in the graphic. The PCV system operates by engine intake manifold vacuum. Filtered air is routed into the crankcase through the air cleaner hose. The metered air, along with crankcase vapors, are drawn through the PCV valve (4) and into a passage in the intake manifold. The PCV system manages crankcase pressure and meters blow by gases to the intake system, reducing engine sludge formation. The PCV valve contains a spring loaded plunger. This plunger meters the amount of crankcase vapors routed into the combustion chamber based on intake manifold vacuum. When the engine is not operating or during an engine pop-back, the spring forces the plunger back against the seat. This will prevent vapors from flowing through the valve. During periods of high manifold vacuum, such as idle or cruising speeds, vacuum is sufficient to completely compress spring. It will then pull the plunger to the top of the valve. In this position there is minimal vapor flow through the valve. During periods of moderate manifold vacuum, the plunger is only pulled part way back from inlet. This results in maximum vapor flow through the valve.
Factory service manual
From the 2008 KK factory manual — descriptions, specs, torque & procedures for this part.
VALVE-PCV-3.7L📷 1

Description

A PCV valve (1) using a rubber sealing O-ring (2) is used.
The PCV valve is threaded into a metal fitting. The valve (2) is located at the rear of the left cylinder head.
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POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM📷 4
A typical enclosed crankcase ventilation system is shown in the graphic.
The PCV system operates by engine intake manifold vacuum. Filtered air is routed into the crankcase through the air cleaner hose. The metered air, along with crankcase vapors, are drawn through the PCV valve (4) and into a passage in the intake manifold. The PCV system manages crankcase pressure and meters blow by gases to the intake system, reducing engine sludge formation.
The PCV valve contains a spring loaded plunger. This plunger meters the amount of crankcase vapors routed into the combustion chamber based on intake manifold vacuum.
When the engine is not operating or during an engine pop-back, the spring forces the plunger back against the seat. This will prevent vapors from flowing through the valve.
During periods of high manifold vacuum, such as idle or cruising speeds, vacuum is sufficient to completely compress spring. It will then pull the plunger to the top of the valve. In this position there is minimal vapor flow
through the valve.
During periods of moderate manifold vacuum, the plunger is only pulled part way back from inlet. This results in maximum vapor flow through the valve.
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REMOVAL - 3.7L📷 2
The PCV valve is located at the rear of the left cylinder head.
1. Remove line (1) and rubber connector hose from PCV valve.
2. Unthread PCV valve (3) from metal fitting (2).
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INSTALLATION - 3.7L📷 4
1. Check condition of PCV valve rubber O-ring (2).
2. Clean fitting (2). 3. Install PCV valve (3) into fitting (2).
4. Install PCV line (1) and rubber connector to valve.
LINES-VACUUM
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