Crossfire SRT-6 V6-3.2L SC VIN N (2005)
Coolant: Description and Operation
COOLANT
DESCRIPTION
WARNING: ANTIFREEZE IS AN ETHYLENE-GLYCOL BASE COOLANT AND IS HARMFUL IF SWALLOWED OR INHALED. IF
SWALLOWED, DRINK TWO GLASSES OF WATER AND INDUCE VOMITING. IF INHALED, MOVE TO FRESH AIR AREA. SEEK
MEDICAL ATTENTION IMMEDIATELY. DO NOT STORE IN OPEN OR UNMARKED CONTAINERS. WASH SKIN AND
CLOTHING THOROUGHLY AFTER COMING IN CONTACT WITH ETHYLENE/GLYCOL. KEEP OUT OF REACH OF CHILDREN.
DISPOSE OF GLYCOL BASE COOLANT PROPERLY, CONTACT YOUR DEALER OR GOVERNMENT AGENCY FOR LOCATION
OF COLLECTION CENTER IN YOUR AREA. DO NOT OPEN A COOLING SYSTEM WHEN THE ENGINE IS AT OPERATING
TEMPERATURE OR HOT UNDER PRESSURE, PERSONAL INJURY CAN RESULT. AVOID RADIATOR COOLING FAN WHEN
ENGINE COMPARTMENT RELATED SERVICE IS PERFORMED, PERSONAL INJURY CAN RESULT.
CAUTION: Use of Propylene-Glycol based coolants is not recommended, as they provide less freeze protection and less corrosion protection.
The cooling system is designed around the coolant. The coolant must accept heat from engine metal, in the cylinder head area near the exhaust valves
and engine block. The coolant then carries the heat to the radiator where the tube/fin radiator can transfer the heat to the air.
The use of aluminum cylinder blocks, cylinder heads, and water pumps require special corrosion protection. Use coolant approved to MB 325.0, such
as Mopar part number 05066386AA, or an equivalent Extended Life Coolant with the HOAT inhibitor system. This coolant offers the best engine
cooling without corrosion when mixed with 50% ethylene-glycol and 50% distilled water to obtain a freeze point of -37°C (-35°F). If it loses color or
becomes contaminated, drain, flush, and replace with a fresh properly mixed coolant solution.
CAUTION: Mixing of coolants other than specified (non-HOAT or other HOAT), may result in decreased corrosion protection, and engine damage
could result. The subsequent engine damage may not be covered under the new vehicle warranty.
COOLANT PERFORMANCE
The required ethylene-glycol (antifreeze) and water mixture depends upon the climate and the vehicle operating conditions. The coolant performance
of various mixtures follows:
Pure Water-Water can absorb more heat than a mixture of water and ethylene/glycol. This is for the purpose of heat transfer only. Water also freezes
at a higher temperature and allows corrosion.
100 percent Ethylene-Glycol-The corrosion inhibiting additives in ethylene-glycol need the presence of water to dissolve. Without water, additives
form deposits in the cooling system. These act as insulation causing the temperature to rise to as high as 149°C (300°F) This temperature is hot
enough to melt plastic and soften solder. The increased engine operating 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 the 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 the 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
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 antifreeze/ coolant prevents water present in the cooling system from freezing
within temperatures indicated by mixture ratio of coolant to water.
