Sprinter 2500 V6-3.0L DSL Turbo (2008)
Coolant: Description and Operation
HOAT Coolant
HOAT COOLANT
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. Then coolant 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 requires special corrosion protection. Use coolant approved to MB 325.0, such as
EURO Peak Coolant/Anti-freeze (OLD WORLD INDUSTRIES), Zerex G05 or G48 (The Valvoline Company), Glysantin G05 (BASF AG),
MOPAR(R) 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% anti-freeze and 50% distilled water to obtain a freeze point of -37°C (-34°F). If it loses color or
becomes contaminated, drain, flush, and replace with fresh properly mixed coolant solution.
CAUTION: This coolant may not be mixed with any other type of antifreeze. Mixing of coolants other than specified (non-HOAT), may result
in engine damage that may not be covered under the new vehicle warranty, and decreased corrosion protection.
CAUTION: Do not use coolant additives that are claimed to improve engine cooling.
COOLANT PERFORMANCE
The required ethylene-glycol (antifreeze) and water mixture depends upon climate and 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 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 system. These act as insulation causing temperature to rise. 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.
