PCV System Description

Some of the unburned gases in the combustion chamber will leak through 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 flowing into the atmosphere.

Except K24Z7 Engine 

Courtesy of HONDA, U.S.A., INC.

K24Z7 Engine 

Courtesy of HONDA, U.S.A., INC.