Engine Testing - General Information Section 14 - Engine Testing - Group 14 M11 Page 14-4 General Run-In Procedures Caution: Refer to General Engine Test Specifications in this section before operating the engine to avoid internal component damage. The amount of time specified for the following engine run-in phases are minimums. The engine can be operated for longer periods of time at each operating range or phase with the exception of en- gine idling which must be kept to 5 minutes or less. Start the engine and idle for initial check. Avoid long idle periods.
Operate the engine at low idle only long enough (5 minutes maximum) to check for cor- rect oil pressure and any fuel, oil, water, or air leaks. Do not operate the engine at idle speed longer than specified during engine run-in. Excessive carbon forma- tion will occur and cause damage to the engine. To avoid internal component damage, do not allow the engine speed to exceed 1,000 RPM before run-in. While the engine is idling, listen for unusual noises; watch for coolant, fuel, and lubricating oil leaks; and check for correct engine operation in general. Repair all leaks or component problems before continu- ing the engine run-in.