Positive Crankcase Ventilation: Testing and Inspection

Positive Crankcase Ventilation (PCV) System. 1982-86 2600cc engine & 1982-86 2000cc engine:

DESCRIPTION

Exc. 1983-85 Pickup w/ Diesel Engine
This system incorporates a PCV valve which is located at the rocker arm cover, Fig. 2. With this system, fresh air is routed from the air cleaner to the front of the valve cover and into the crankcase where the fresh air is mixed with the blow-by gasses. The mixture of fresh air and blow-by gasses then passes through the PCV valve and is drawn through a hose to the intake manifold and to the combustion chamber. Under high speed or during acceleration conditions, the blow-by gasses are drawn through the PCV valve to the intake manifold and through the breather to the air cleaner and routed into the combustion chamber.

SYSTEM TESTING
1. Check if hoses or PCV valve is clogged.
2. Check air flow through hoses as shown in Fig. 2.