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).
To properly monitor engine performance, record the following parameters. To limit dynamometer operating time,
instrument the engine to make as many checks as possible.
• Engine speed rpm with a verified tachometer
• Fuel pressure
• Fuel rate
• Fuel temperature (if needed to correct fuel rate)
• Fuel inlet restriction
• Fuel drain line restriction
• Intake manifold pressure
• Intake air restriction
• Exhaust air restriction
• Coolant temperature
• Engine blowby
• Lubricating oil pressure
• Coolant pressure
• Inlet air temperature
