2005 Dodge Ram 2500 Pickup Owner Manual - Page 369

MAINTAINING YOUR VEHICLE 369 For 3.7L, 4.7L, and 5.7L engines, check the coolant bottle hoses for condition and tightness of the connections at both the coolant bottle and radiator. Coolant Level ( 3.7L, 4.7L, 5.7L Engines) The coolant reserve system provides a quick visual method of determining that the coolant level is adequate. With the engine idling, and warmed to the normal operating temperature, the level of the coolant in the coolant bottle should be between the fluid level marks. Check the coolant level whenever the hood is raised. The radiator normally remains completely full, so there is no longer a need to remove the coolant pressure cap except for checking coolant freeze point or replacement with new antifreeze coolant. WARNING! Never add coolant to the radiator when the engine is overheated. Do not loosen or remove pressure cap to cool an overheated engine! The coolant is under pressure and severe scalding could result. Drain, Flush And Refill At intervals shown on the Maintenance Schedules, the system should be drained, flushed and refilled. Refer to your dealer or consult a service manual for proper procedures. Adding Coolant When adding coolant, or refilling the system, a minimum solution of 50% recommended HOAT ethylene glycol engine coolant (antifreeze) and distilled water should be used. Use higher concentrations (not to exceed 70%) if temperatures below Ϫ34°F (Ϫ37°C) are anticipated. 7