Mechanics

HEATER CORE

2000 Dodge Ram

Heater problem
2000 Dodge Ram V8 Four Wheel Drive Automatic 100, 00 miles

HOW DO YOU CHANGE A HEATER CORE?
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CHRIS1962
October 8, 2008.



1.Disable air bag system.
Disconnect negative battery cable. Drain cooling system.
Remove left and right kick panel trim.
Remove 5 screws and knee bolster/lower steering column cover.
Remove hood release and parking brake release handle screws from lower instrument panel support. Disconnect parking brake release rod.
Remove 6 screws and instrument panel support. 2.Disconnect air bag connector at lower left corner of instrument panel. Remove 2 screws from Air Bag Control Module (ACM) cover.
Remove 4 screws holding ACM to bracket on transmission tunnel. 3.If equipped, disconnect overdrive lock-out switch wiring harness connector from instrument panel wire harness near instrument panel lower reinforcement. Loosen multifunction switch connector screw (screw will remain in connector). Place ignition switch in LOCK position. Remove steering column as an entire assembly from vehicle. DO NOT allow steering wheel to rotate freely while steering column is removed. 4.Remove remaining steering column electrical connectors. Remove air bag wiring harness from steering column wiring trough. Remove wiring trough from steering column. Remove 3 toe plate nuts and washers. 5.Remove 2 nuts and washers attaching steering column bracket to instrument panel steering column support bracket. Allow column to lower and rest on seat. 6.Disconnect wiring at ACM. Disconnect instrument panel left side wiring connectors. Remove screw holding brake release to bottom of instrument panel. Disconnect instrument panel right side wiring connectors, which includes 2 connectors attached to A/C-heater assembly housing, courtesy light connector, antenna cable and 2 body connectors. Disconnect vacuum harness from A/C-heater system.
7.Remove 5 screws holding instrument panel to dash. Loosen lower instrument panel pivot bolts.
. Roll instrument panel downward. Remove instrument panel from vehicle.
8.Remove and disassemble A/C-heater housing. See A/C-HEATER ASSEMBLY . Separate halves of A/C-heater housing and remove top half. Remove evaporator or heater core from housing. If replacing evaporator with NEW unit, add one ounce of clean SP-20 PAG refrigerant oil to replacement evaporator prior to installation.
9.To install, reverse removal procedure. Install and lubricate new "O" rings to A/C fittings. Evacuate and charge A/C system. Fill cooling system. On diesel engine applications, engine is equipped with a one-way check valve in cooling system. DO NOT run engine while filling cooling system. Fill engine cooling system with engine turned off. On all applications, check A/C-heater system performance.
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BMRFIXIT
Oct 9, 2008.