RAM 2500 Truck 2WD V10-8.0L VIN W (2003)
plastic and soften solder. The increased temperature can result in engine detonation. In addition, 100 percent ethylene-glycol freezes at -22 °C (-8 °F).
50/50 Ethylene-Glycol and Water-Is the recommended mixture, it provides protection against freezing to -37 °C (-34 °F). The antifreeze
concentration must always be a minimum of 44 percent, year round in all climates. If percentage is lower, engine parts may be eroded by cavitation.
Maximum protection against freezing is provided with a 68 percent antifreeze concentration, which prevents freezing down to -67.7 °C (-90 °F). A
higher percentage will freeze at a warmer temperature. Also, a higher percentage of antifreeze can cause the engine to overheat because specific heat
of antifreeze is lower than that of water.
CAUTION: Richer antifreeze mixtures cannot be measured with normal field equipment and can cause problems associated with 100 percent
ethylene-glycol.
COOLANT SELECTION AND ADDITIVES
The use of aluminum cylinder blocks, cylinder heads and water pumps requires special corrosion protection. Only Mopar Antifreeze/Coolant, 5
Year/100,000 Mile Formula (glycol base coolant with corrosion inhibitors called HOAT, for Hybrid Organic Additive Technology) is recommended.
This coolant offers the best engine cooling without corrosion when mixed with 50% distilled water to obtain to obtain a freeze point of -37 °C (-35 °
F). If it loses color or becomes contaminated, drain, flush, and replace with fresh properly mixed coolant solution.
CAUTION: Do not use coolant additives that are claimed to improve engine cooling.
OPERATION
Coolant flows through the engine block absorbing the heat from the engine, then flows to the radiator where the cooling fins in the radiator transfers
the heat from the coolant to the atmosphere. During cold weather the ethylene-glycol or propylene-glycol coolant prevents water present in the cooling
system from freezing within temperatures indicated by mixture ratio of coolant to water.
