15 Rev-5 Dec 2, 2019
PCV SYSTEM
The Positive Crankcase Ventilation (PCV) system recirculates the
crankcase blow-by gases into the intake manifold to be combusted in the
engine. When the blow-by vapor pressure is high enough to overcome
the spring pressure in the PCV valve, the valve opens to allow blow-by
vapor into the intake manifold for combustion along with the fuel/air
mixture.
Inspection & Cleaning:
1. Remove and inspect the breather hose and fitting.
Clean or replace if needed.
2. Remove and inspect the PCV hose.
Clean or replace if needed.
3. Remove and inspect the PCV valve.
Clean the PCV valve if needed.
Summary of Contents for NA428
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