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Bob, Auto Tech
Category: Chevy
Satisfied Customers: 4087
Experience:  Plus 40 years GM, over 30 certified with Chevrolet, ASE certified Master Tech. (Expired, Retired)
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i need to replace the heater core

Customer Question

i need to replace the heater core
Submitted: 10 years ago.
Category: Chevy
Expert:  Bob replied 10 years ago.

1968-77 MODELS

  1. Disconnect the negative battery cable.

  2. Drain the radiator.

  3. Disconnect the heater hoses. Plug the core inlet and outlet.

  4. Remove the nuts from the air distributor duct studs on the firewall.

  5. On 1970-77 Camaros: remove the glove box and radio, then the defroster duct-to-distributor duct screw.

  6. Pull the defroster duct out of the way, then pull the distributor duct from the firewall mounting. Remove the resistor wires. Lay the duct on the floor.

  7. Remove the core assembly from the distributor duct.

  8. Reverse the procedure to install. Use new sealer on the duct flange, if necessaryClick image to see an enlarged view
    Fig. 1: Schematic of the airflow through a typical Camaro heating system

  9. Click image to see an enlarged view
    Fig. 2: The heater blower motor mounts to the left-hand side of the firewall in the engine compartment