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PCV System Description

For locations of each component on the vehicle, refer to the Component Location Index .

Some of the unburned gases in the combustion chamber will leak past the gap between the pistons and cylinders into the crankcase. The blow-by gases that include the unburned gases are returned through the positive crankcase ventilation (PCV) valve and are burned. This prevents the blow-by gases from escaping into the atmosphere.

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