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Maintain the following limits during the engine test and run-in procedures:
Due to the variations in ratings of different engine models, refer to the specific Engine Data Sheet” for the specific engine model being tested.
Charge Air Cooler Restriction (Maximum):
| Hg (Mercury) | 152 mm Hg [6 in Hg] |
| Pounds Force | 21 kPa [3 psi] |
Intake Restriction (Maximum at Advertised Horsepower):
| Clean air filter | 254 mm H2O [10 in H2O] |
| Dirty air filter | 635 mm H2O [25 in H2O] |
| Maximum Exhaust Back Pressure | 75 mm Hg [3 in Hg] |
Blowby (1) (Maximum at Advertised Horsepower):
| New or rebuilt engines (Maximum)(less than 160,000 km [100,000 mi] or 3600 hours) | 305 cm H2O [12 in H2O |
| Used engines (Maximum)(over 160,000 km [100,000 mi] or 3600 hours) | 460 cm H2O [18 in H2O |
Oil Pressure:
| Low idle (minimum allowable) | 69 kPa [10 psi] |
| At 1200 rpm or torque peak (minimum allowable) | 207 kPa [30 psi] |
| At advertised rpm | 276 to 345 kPa [40 to 50 psi] |
| Maximum Cylinder Block Coolant Pressure (Closed Thermostat) | 275 kPa [40 psi] |
| Maximum Allowable Operating Temperature | 100°C [212°F] |
| Maximum Allowable Fuel Inlet Temperature | 71°C [160°F] |
Fuel Inlet Maximum Restriction:
CELECT™ and CELECT™ Plus
| Clean fuel filter | 152 mm Hg [6 in Hg] |
| Dirty fuel filter | 254 mm Hg [10 in Hg] |
Fuel Inlet Maximum Restriction:
STC
| Clean fuel filter | 102 mm Hg [4 in Hg] |
| Dirty fuel filter | 204 mm Hg [8 in Hg] |
Fuel Drain Line Maximum Restriction:
| CELECT™ and CELECT™ Plus | 89 mm Hg [3.5 in Hg] |
| STC — Without check valves | 63 mm Hg [2.5 in Hg] |
| STC — With check valves | 165 mm Hg [6.5 in Hg] |
(1) Blowby checking tool, Part Number 3822566, has a special 7.67 mm [0.302 in] orifice that must be used to make sure an accurate reading is obtained.
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