Dodge Durango (HB). Manual - part 130
CAUTION: Do not use coolant additives that are claimed to improve engine cooling.
COOLANT LEVEL CHECK
Note: Do not remove radiator cap for routine cool-
ant level inspections. The coolant level can be
checked at coolant recovery bottle (2).
The coolant reserve/overflow system (5) provides a
quick method for determining coolant level without
removing radiator pressure cap. With engine not run-
ning, open the coolant recovery bottle cap and remove
coolant level indicator dipstick to observe coolant level
in coolant recovery bottle. The coolant level should be
between ADD and FULL marks. If the coolant level is
at or below the ADD mark, fill the recovery bottle with
a 50/50 mixture of antifreeze and water ONE QUART
AT A TIME. Repeat this procedure until the coolant
level is at the FULL mark.
COOLING SYSTEM CLEANING/REVERSE FLUSHING
CLEANING
Drain cooling system and refill with water. Run engine with radiator cap installed until upper radiator hose is hot.
Stop engine and drain water from system. If water is dirty, fill system with water, run engine and drain system.
Repeat until water drains clean.
REVERSE FLUSHING
Reverse flushing of cooling system is the forcing of water through the cooling system. This is done using air pres-
sure in the opposite direction of normal coolant flow. It is usually only necessary with very dirty systems with evi-
dence of partial plugging.
REVERSE FLUSHING RADIATOR
Disconnect radiator hoses from radiator inlet and outlet. Attach a section of radiator hose to radiator bottom outlet
fitting and insert flushing gun. Connect a water supply hose and air supply hose to flushing gun.
CAUTION: Internal radiator pressure must not exceed 138 kPa (20 psi) as damage to radiator may result.
Allow radiator to fill with water. When radiator is filled, apply air in short blasts. Allow radiator to refill between blasts.
Continue this reverse flushing until clean water flows out through rear of radiator cooling tube passages. Have radi-
ator cleaned more extensively by a radiator repair shop.
REVERSE FLUSHING ENGINE
Drain cooling system. Remove thermostat housing and thermostat. Install thermostat housing. Disconnect radiator
upper hose from radiator and attach flushing gun to hose. Disconnect radiator lower hose from water pump and
attach a lead-away hose to water pump inlet fitting.
CAUTION: On vehicles equipped with a heater water control valve, be sure heater control valve is closed
(heat off). This will prevent coolant flow with scale and other deposits from entering heater core.
HB
COOLING
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