Inspection of the Cooling System
A coolant system properly maintained and protected with supplemental coolant inhibitors can be operated up to the intervals listed in this manual using the appropriate engine duty cycle, Preventive Maintenance Tables. At these intervals the coolant must be drained and disposed of in an environmentally responsible manner according to state and/or federal recommendations. Authorized Detroit™ service outlets are properly equipped for this type of service.
Inspect the cooling system as follows:
Checking for Coolant Leaks
Perform daily visual checks for cooling system leaks. Look for an accumulation of coolant when the engine is running and when it is stopped. Check all cooling system pipes and hoses for damage and leaks and ensure they are positioned to avoid chafing, and are securely fastened. Coolant leaks may be more apparent on an engine when it is cold. If coolant leaks exist, it may be necessary to take the vehicle to an authorized Detroit™ service outlet.
Checking the Coolant Level
The coolant level should be inspected daily as part of the pre-start inspection, Checking the Coolant Level (Cold Check). If necessary, fill the cooling system with approved coolant, How to Select Coolants.
Testing the Coolant
Refer to the Coolant Requirements For Engine Cooling Systems brochure (DDC-SVC-BRO-0002) for the latest information on coolants and coolant testing.