Operate the engine at maximum horsepower RPM and
advertised horsepower.
Observe the gauge or manometer.
NOTE: Pressure must not exceed 75 mm Hg [3.0 inches
Hg].
Engine Blowby
Measure the engine crankcase pressure.
Use blowby checking tool, Part No. 3375150, and water
manometer, Part No. ST-1111-3.
Install a plug in the crankcase breather vent tube.
Remove the ‘‘bottle stopper’’ oil filler cap and install the
blowby checking tool, Part No. 3375150.
Install the water manometer to the blowby checking tool.
Observe the engine blowby.
Engine blowby must not exceed the following specifica-
tions:
Blowby Specifications
New, Rebuilt Engines* 30.5 cm H
2
0 [12.0 in H
2
0]
Used Engines** 46.0 cm H
2
0 [18.0 in H
2
0]
*Less than 160,000 km [100,000 miles] or 3600 hours.
**Over 160,000 km [100,000 miles] or 3600 hours.
General Test Procedure - Chassis Dynamometer (8-06) Engine Testing
N14Page 8-48
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