For 1990-2009 cars

Callout | Component Name
--- | ---

#### Preliminary Procedure

Remove the heater core tubes from heater core while leaving the heater hoses connected to the tubes. Cap or plug heater core and tube openings to prevent spillage of fluids upon removal. Refer to Heater Core Tube Replacement .

1 | Heater Core

#### Procedure

1. Reposition the heater core outward from the heater case to ease in removal.
2. Mark the location of the center foam seal from the old heater core to the new heater core.
3. Press on foam seals to activate adhesive.
4. Keep the heater core horizontal and straight when inserting into the HVAC module in order to prevent foam seal damage.
5. Push heater core until the foam seal around the heater core tank is inserted into the HVAC module and the heater core is fully seated.