Cooling System Requirements

COOLING

SPECIFICATIONS

COOLANT PERFORMANCE
Coolant performance is measurable. For heat transfer, pure water absorbs 1 btu for each degree of temperature rise for each pound of water. This formula is altered when necessary additives to control boiling, freezing, and corrosion are added as follows:
- Pure water (1 btu/lbm °F) boils at 100 °C (212 °F) and freezes at 0 °C (32 °F).
- 100 percent ethylene glycol (0.7 btu/lbm °F) can cause an engine to run hot, cause detonation, and will freeze at -22 °C (-8 °F).
- 50/50 Ethylene Glycol and Distilled Water (0.82 btu/lbm °F) is the recommended combination that provides a freeze point of -37 °C (-35 °F). The radiator, water pump, engine water jacket, pressure cap, thermostat, temperature gauge, coolant sensor and heater are all designed for 50/50 ethylene glycol.

Where required, a 56 % glycol and 44 % water mixture will provide a freeze point of -46 °C (50 °F)

SELECTION AND ADDITIVES
The use of aluminum cylinder blocks, cylinder heads, intake manifolds, and water pumps require special corrosion protection. Mopar Antifreeze/Coolant, 5 Year/100,000 Mile Formula (orange in color), or the equivalent is recommended. This coolant provides optimum engine cooling and protection against corrosion when mixed to a freeze point of -37 °C (-35 °F) to -59 °C (-50 °F). If it looses color or becomes contaminated, drain, flush, and replace with fresh properly mixed solution.

CAUTION: Do not use well water, or suspect water supply in cooling system. A 50/50 ethylene glycol and distilled water mix is recommended.

To maintain ample temperature levels from the heating-A/C system, the cooling system must be in proper working order.

The use of a bug screen is not recommended. Any obstructions forward of the condenser can reduce the effectiveness of the air conditioning system.