Question about 1991 Chevrolet Corsica

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Heater core 1991 corsica needs to be replaced. how do i get to it?

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  1. Disconnect the negative battery cable.
  2. Drain the cooling system into a suitable container.
  3. Properly disable the SIR system, as outlined earlier in this section.
  4. Remove the instrument panel as outlined in this section.
  5. Remove the screws and floor outlet, turning clockwise and to the right to release from the rear floor air outlet.
  6. Raise the vehicle and support it safely.
  7. Detach the heater hoses from the heater core.
  8. Disconnect the drain tube elbow from the heater core cover.
  9. Carefully lower the vehicle.
  10. Unfasten the retaining screws, then remove the heater core cover.
  11. Remove the core screws, clamps and heater core from the vehicle.
heater core 1991 corsica needs to be replaced - e9c0b51.jpg

Fig. : Exploded view of the heater core and related components - 1991-92 vehicles without A/C

To install:
  1. Reposition the heater core and install the straps and screws.
  2. Install the heater core cover and attaching screws.
  3. Install the floor outlet and retaining screws.
  4. Install the instrument panel.
  5. Raise the vehicle and support it safely.
  6. Connect the heater hoses to the heater core.
  7. Carefully lower the vehicle.
  8. Fill the cooling system with the proper type and amount of coolant.
  9. Enable the SIR system, as outlined earlier in this section.
  10. Connect the negative battery cable, then start the engine and check for coolant leaks. Check the coolant level, and add if necessary.

Hope this help (remember rated this post). Good luck.

Posted on May 15, 2010

  • sjung12 Jun 25, 2010

    Before you start, make sure that you have checked under the hood. The heater hose line that enters the heater core, runs along the firewall, has a small section of steel pipe about 6 inches long that lies on top of a metal ridge which catches dirt and grime and slowly erodes the pipe causing pin size holes and spray coolant in such a way that your first assumption with the puddle under your car is the heater core.


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