TM 10-3950-672-24-2
Measure the intake manifold pressure.
Install a
pressure gauge, Part No. ST-1273, in the location
shown.
Minimum Gauge Capacity: 1905 mm Hg [75 in. Hg]
Measure the blowby by installing blowby checking tool in
the crankcase breather vent. Connect the blowby tool to
a water manometer.
NOTE: Excessive blowby indicates an engine internal
components malfunction, allowing combustion gases to
Minimum Gauge Capacity: 1270 mm H20 [50 in. H20]
NOTE: If a sudden increase in blowby occurs, or if
blowby exceeds the maximum allowable limit during any
run-in step, return to the previous step and continue the
run-in. If blowby does not reach an acceptable level,
discontinue the run-in and determine the cause.
NOTE: Avoid long idle periods. Operate the engine at
low idle only long enough (3 to 5 minutes) to check for
correct oil pressure and any fuel, oil, water, or air leaks.
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