MAINTENANCE Item 4 – Cooling System be replenished with a non-chromate corrosion inhibitor supplement when indicated by testing the coolant. Refer to How to Select Coolant in this guide for required test intervals and inhibitor levels. The cooling system must be full for proper operation of the engine. HOT COOLANT To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure. NOTICE: Coolant must be inhibited with the recommended SCA's (supplemental coolant additives) listed in this guide.
In addition, the engine can be equipped with a coolant filter/inhibitor system as an installed option or as an after-sale item. Failure to check and maintain SCA levels at required concentrations will result in severe damage (corrosion) to the engine cooling system and related components. Check the coolant level daily and maintain it near the bottom of the filler neck on the radiator. On some installations this is done by checking an overflow bottle or sight glass. Add coolant as required, but do not overfill. Before adding coolant, refer to How to Select Coolant in this guide. Coolant Drain Interval Detroit Diesel recommends replacing coolant at the intervals listed in Table 12.
Coolant Level Make a daily visual check for cooling system leaks. Look for an accumulation of coolant when the engine is running and when it is stopped. Coolant leaks may be more apparent on a engine when it is cold. Coolant Inhibitors The inhibitors in antifreeze solutions must 60 All information subject to change without notice. DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION