1998 DODGE RAM 1500 vin

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Page 348 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual 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 atmosp

Page 349 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual (4)Do Notattempt to remove the fan/viscous fan
drive assembly from the vehicle at this time.
(5)Do Notunbolt the fan blade assembly (Fig. 3)
from viscous fan drive at this time.
(6) Remove the fan shr

Page 351 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual INSTALLATION
(1) Install fan blade assembly to electrically con-
trolled viscous fan drive. Tighten mounting bolts to
24 N´m (18 ft. lbs.) torque.
(2) Position the fan blade/viscous fan drive to the

Page 352 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual REMOVAL
(1) Disconnect the battery negative cable.
(2) Drain the coolant (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(3) Remove the power cord from the heater by
unplugging (Fig. 7).
(4) Loosen (but

Page 357 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual DIAGNOSIS AND TESTINGÐTHERMOSTAT
ON-BOARD DIAGNOSTICS
Allgasoline powered modelsare equipped with
On-Board Diagnostics for certain cooling system com-
ponents. Refer to On-Board Diagnostics (OBD) in

Page 362 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual DIAGNOSIS AND TESTING - THERMOSTAT
The cooling system used with the diesel engine
provides the extra coolant capacity and extra cooling
protection needed for higher GVWR (Gross Vehicle
Weight Rating)

Page 364 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual The DTC can also be accessed through the DRB
scan tool. Refer to the appropriate Powertrain Diag-
nostic Procedures information for diagnostic informa-
tion and operation of the DRB scan tool.
REMOVAL

Page 369 of 2627

DODGE RAM 1500 1998 2.G Workshop Manual RADIATOR-3.7L/4.7L/5.7L
DESCRIPTION
The radiator is a aluminum cross-flow design with
horizontal tubes through the radiator core and verti-
cal plastic side tanks (Fig. 38).
This radiator does not con