Pcv Valve Flow Rate - Jeep 1987 Wrangler Workshop Manual

Ill
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Ill
POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM
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S E E
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Remove the valve from the grommet in the
cylinder head cover.
Connect the plastic hose of PCV Valve Tester
J-23111, or equivalent, to the valve.
N O T E : Hold the P C V valve in a horizontal
position and tap lightly during the test. Hold the
tester in a vertical position.
80009
WARNING: Use extreme caution when the
engine is operating. Do not stand in a direct line
with the fan. Do not put your hands near the
pulleys, belts or fan. Do not wear loose clothing.
Start the engine and allow it to idle. Observe the
flow rate (l/s or cfm). Refer to P C V Valve Flow
Rate chart.
PCV Valve Flow Rate
Engine Manifold Air Flow
Vacuum in Liters/Second
kPa (Hg.) (CFM)
54 (16)
0.0 - 0.094
50.66 (15) (0.0 - 0.2)
37 (11) 0.424 - 0.943
20.26 (6) (0.9 - 2.0)
17(5)
0.708 - 1 - 1.18
10.13 (3) (1.5 - 2.5)
90751
With a low vacuum level, it may be necessary to
load the engine while testing the flow rate.
Replace the valve if the airflow rate is either
above or below the specification. Ensure the
correct P C V valve is used for replacement.
B-244