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7 - 2
COOLING SYSTEM
SYSTEM
COOLANT
ROUTING
Coolant flow circuits for 3.9L, 5 . 2 L a n d 5.9L en-
gines w i t h w a t e r cooled i n t a k e manifolds a r e shown
i n f i g u r e 1.
NOTE: HEATER
COOLANT FLOW
CIRCUIT IS ALWAYS
OPEN EXCEPT
WHEN IN AAAX. A / C
OR OFF MODES
HEATER
INTAKE MANIFOLD
COOLANT FLOW "METERED"
FROM REAR TO
FRONT AND BELOW
EXHAUST HEAT
CROSSOVER
SHUT OFF VALVE
A / C ONLY
COOLANT FLOW - PUMP TO
CYLINDER BLOCK, UP THROUGH
CYUNDER HEADS TO INTAKE
MANIFOLD WATER BOX TO
RADIATOR-TO PUMP
•BYPASS
THERMOSTAT CLOSED-HIGH FLOW
THERMOSTAT OPEN-LOW FLOW
RR07B52
Fig. 1 Cooling System Routing
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