Engine Dynamometer Test - Engine Run-In (14-02)
Section 14 - Engine Testing - Group 14
B Series Shop Manual
Caution: If the lubricating oil pressure is not within spec-
ifications, shut off the engine immediately. Either ex-
cessively low or excessively high oil pressure will cause
Engine oil pressure must be at least 69 kPa [10 psi] at 700
Correct the problem if the oil pressure is not within
Caution: Do not operate the engine at idle speed longer
than specified during engine run-in. Excessive carbon
formation will cause damage to the engine.
Operate the engine at approximately 700 RPM for 3 to 5
Listen for unusual noises; watch for coolant, fuel, and
lubricating oil leaks; and check for correct engine oper-
ation in general.
NOTE: Repair all leaks or component problems before con-
tinuing the engine run-in.
Move the throttle to obtain 1,200 RPM engine speed, and
set the test load to 25 percent of the torque peak load.
Operate the engine at this speed and load level until the
coolant temperature is 70°C [160°F]. Check all gauges
and record the data.
NOTE: Do not proceed to the next step until a steady blowby
reading is obtained.