GHG17 DD Medium Duty Operators Manual idling engine for 15 minutes after the top hose is hot (thermostat opens if it wasn’t removed). Drain the Penray 2011 solution from the system. The radiator, block and HVAC system must both be drained. Flush with clean water for 3-5 minutes. Keep flushing as long as water looks “rusty” or “turbid.” Replace drain fittings. Recharge cooling system with the appropriate ratio of clean water and the proper antifreeze for your application. The concentrations of SLC inhibitors will gradually deplete during normal engine operation. SCAs replenish the protection for cooling system components and must be added to the cooling system on an as needed basis.
Below are test procedures that will assist in determining the inhibitor concentration. Standard Life Coolant Additive Maintenance Procedures Appendix A - Definitions Antifreeze: A substance that is added to the water in a vehicle’s cooling system that lowers the freeze point to prevent freezing. The two most common antifreezes are ethylene glycol (EG) and propylene glycol (PG). Coolant: A fluid that transfers heat from the engine by circulation. Extended Life Coolant (ELC): AKA - Long-Life Coolant or Organic Acid Technology: These types of coolants have been formulated to extend the service interval of the coolant. Example of ELC is Power Cool Plus. Fully Formulated:
Antifreeze that contains all the necessary inhibitors to protect a diesel engine and does not, therefore, require a pre-charge of Supplemental Coolant Additive before its first use. Initial-Fill: The coolant that is used in a new or rebuilt engine, or used any time the cooling system is emptied and then refilled with new coolant. Standard Life Coolant (SLC): AKA - Fully-Formulated or Conventional Coolant: These types of coolants use supplemental coolant additives (SCA) to protect against corrosion or mechanical wear. Example of SLC is Power Cool. Supplemental Coolant Additive:
An additive used in a preventive maintenance program to prevent corrosion, cavitation, and the formation of deposits. All information subject to change without notice. 105 DDC-SVC-MAN-0192 Copyright © 2017 DETROIT DIESEL CORPORATION