Section 14 - Engine Testing - Group 14 Chassis Dynamometer (14-03) M11 Page 14-39 Adjust the vehicle and dynamometer room exhaust system to make sure all exhaust gases are removed from the room. Refer to the chassis dynamometer and vehicle manufacturer’srecommendationsandspecifications for testing procedures. General Test Procedure Check the engine coolant level to be sure it is filled to the proper level. Warning: Check the coolant level only when the engine is stopped. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Failure to do so can cause personal injury from heated coolant spray. Caution: Do not add cold coolant to a hot engine.
This can cause engine casting damage. Allow the engine to cool to below 50°C [120°F] before adding coolant. Check the engine lubricating oil level to be sure it is filled to the proper level. NOTE: Use a known source of ‘‘good’’ quality No. 2 diesel fuel. This is very important since No. 1 diesel fuels, along with most other alternate fuels, are lighter (lower specific gravity, higher API gravity) than No. 2 diesel fuel. The lighter the fuel, the lower the energy content (BTU) per gallon (liter, etc).