MX-5 Miata L4-1597cc 1.6L DOHC (1992)
Positive Crankcase Ventilation: Description and Operation
Fig. 135 PCV System
PURPOSE
The PCV valve is operated by intake manifold vacuum and prevents blow-by gas from escaping to atmosphere.
LOCATION
PCV valve is in right side valve cover.
OPERATION
When running at idle, the valve is slightly opened and a small amount of blow-by gas is drawn into the combustion chamber. At higher engine
speeds the valve opens further and a large amount of blow-by gas is drawn into the combustion chamber.
