Section 14 - Engine Testing - Group 14 Chassis Dynamometer (14-03) M11 Page 14-45 Exhaust Air Restriction Measure the exhaust air restriction. Install the pressure gauge, Part No. ST-1273, or a manometer in the exhaust air piping. The gauge adapter must be installed near the turbo- charger in a straight section of pipe at the turbine outlet. Operate the engine at advertised horsepower. Observe the gauge or manometer. 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 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.