How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Kevin Your Own Question
Kevin
Kevin, Dodge Technician
Category: Dodge
Satisfied Customers: 752
Experience:  15 years working at a Chrysler dealer Master Tech Owner Of Kevins Mobile Repair Atlanta
10592253
Type Your Dodge Question Here...
Kevin is online now
A new question is answered every 9 seconds

changing heater core in 2003 dodge ram 1500, how hard is it whats

Resolved Question:

changing heater core in 2003 dodge ram 1500, how hard is it?whats involved? how long does it take? can I do it myself????
Submitted: 8 years ago.
Category: Dodge
Expert:  Kevin replied 8 years ago.
Welcome to the site my name is Kevin
U will need to remove the dash and HVAC housing to get access to the heater core.
I will post instructions and pics if U would like.
Dont use an aftermarket heater core they are weak and leak real fast use a mopar one.
It will take a first timer about 1/2 to 3/4 of a day to do.
Kevin and 4 other Dodge Specialists are ready to help you
Customer: replied 8 years ago.
can you send me pics and instructions please
Expert:  Kevin replied 8 years ago.
Service Information

REMOVAL

WARNING: On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in accidental airbag deployment, possible personal injury or death.

NOTE: Disassembly of the HVAC housing is not required to remove heater core.

  1. Remove the HVAC housing (Refer to 24 - HEATING & AIR CONDITIONING/DISTRIBUTION/HVAC HOUSING - REMOVAL).
  2. Remove the foam seal from the heater core tubes.
  3. If equipped with the Dual Zone system, remove the linkage rod from the actuator levers to gain access to the heater core (Heater Core – Dual Zone Shown, Single Zone Typical).
  4. Remove the two screws that secure the heater core tube bracket to the HVAC housing.
  5. Remove the heater core tube bracket.
  6. Pull the heater core out of the HVAC housing.
  7. Inspect all foam seals and repair or replace them as required
HVAC housing
Service Information

REMOVAL

WARNING: On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in an accidental airbag deployment, possible personal injury or death.

WARNING: Refer to the applicable warnings and cautions for this system before performing the following operation (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - WARNINGS) and (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - CAUTIONS). Failure to follow the warnings and cautions could result in possible personal injury or death.

NOTE: The HVAC housing must be removed from the vehicle and the two halves of the housing separated for service access of the heater core, evaporator coil, defrost door, blend door(s) and the recirculation door.

  1. Disconnect and isolate the battery negative cable.
  2. Drain the engine cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).
  3. Recover the refrigerant from the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD PROCEDURE - REFRIGERANT RECOVERY).
  4. Disconnect the liquid refrigerant line fitting from the evaporator inlet tube (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING/REFRIGERANT LINE COUPLER - REMOVAL). Discard the O-ring seal and install plugs in, or tape over the opened liquid refrigerant line fitting and evaporator inlet tube.
  5. Remove the accumulator (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING/ACCUMULATOR - REMOVAL). Discard the O-ring seals and install plugs in, or tape over the opened refrigerant line fittings and evaporator outlet tube.
  6. Disconnect the heater hoses from the heater core tubes. Install plugs in, or tape over the opened heater core tubes.
  7. Remove the powertrain control module (PCM) from the engine compartment to gain access to the HVAC housing retaining nuts (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/POWERTRAIN CONTROL MODULE - REMOVAL).
  8. Remove the two nuts from the HVAC housing mounting studs in the engine compartment.
  9. Remove the instrument panel from the vehicle (Refer to 23 - BODY/INSTRUMENT PANEL - REMOVAL).
  10. Remove the bolt that secures the HVAC housing to the floor bracket located in the center of the vehicle (HVAC Housing - Dual Zone Shown, Single Zone Typical).
  11. Remove the two nuts from the HVAC housing mounting studs in the passenger compartment.
  12. Remove the HVAC housing from inside the vehicle. Take care not to allow any remaining coolant to drain onto the vehicles interior
graphic


Dash Assembly

Service Information

REMOVAL

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, SEAT BELT TENSIONER, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

  1. Remove the left a-pillar trim. (Refer to 23 - BODY/INTERIOR/A-PILLAR TRIM/GRAB HANDLE - REMOVAL)
  2. Remove the top cover. (Refer to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT PANEL TOP COVER - REMOVAL)
  3. Disconnect the headliner harness electrical connector at the a-pillar.
  4. Using a trim stick C-4755 or equivalent, from the notch on the bottom, remove the left side cover. (INSTRUMENT PANEL COVERS)
  5. Remove the steering column. (Refer to 19 - STEERING/COLUMN - REMOVAL)
  6. Remove the two bolts at the column support bracket. (COLUMN SUPPORT)
  7. Remove the left cowl trim panel. (Refer to 23 - BODY/INTERIOR/COWL TRIM - REMOVAL)
  8. Remove the instrument panel drivers side bezel. (Refer to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT PANEL DRIVERS SIDE BEZEL - REMOVAL)
  9. Remove the left side mounting bolts. (LEFT SIDE MOUNTING)
  10. Disconnect the wire harness electrical connectors above the brake pedal. (WIRE HARNESS CONNECTORS)
  11. Loosen the screws and remove the hood release handle from the bracket.
  12. Disconnect the park brake release handle actuator rod.
  13. Remove the air bag control module trim cover, if equipped. (INSTRUMENT PANEL COVERS)
  14. Remove the floor console, if equipped. (Refer to 23 - BODY/INTERIOR/FLOOR CONSOLE - REMOVAL)
  15. Remove the center bracket bolts. (CENTER MOUNTING BOLTS)
  16. Disconnect the air bag control module electrical connector.
  17. Remove the right cowl trim cover. (Refer to 23 - BODY/INTERIOR/COWL TRIM - REMOVAL)
  18. Disconnect the two electrical connectors. (RIGHT WIRE HARNESS CONNECTIONS)
  19. Disconnect the radio antenna. (ANTENNA CONNECTION)
  20. Remove the one HVAC screw. (HVAC/INSTRUMENT PANEL MOUNTING)
  21. Using a trim stick C-4755 or equivalent, from the notch on the bottom, remove the right end cap. (PASSENGER SIDE MOUNTING)
  22. Remove the right a-pillar trim. (Refer to 23 - BODY/INTERIOR/A-PILLAR TRIM/GRAB HANDLE - REMOVAL)
  23. Remove the two right side mounting bolts on the a-pillar and one right mounting bolt on the cowl side panel. (PASSENGER SIDE MOUNTING)
  24. Remove the four top instrument panel screws. (UPPER COWL PANEL BOLTS)
  25. Remove the two top instrument panel bolts and remove the instrument panel
NOTE when it says remove steering column just lay it down infront of the driver seat U dont need to take it out. move seat back all the way then it will sit down there put something over it so it wont get scrached up.

Hidden bolts when the steering is down

graphic

Kevin and 4 other Dodge Specialists are ready to help you