How to remove heater core on Buick lesabre?

Removal & InstallationPrint

1. Disconnect the negative battery cable.
2. Drain the cooling system into a clean container for reuse.
3. Remove or disconnect the following:
   
   
   Heater hoses from the heater core

   Right sound insulator

   All necessary electrical connectors and remove the instrument panel compartment

   Temperature valve actuator

   Electrical connector and remove the HVAC programmer

   Heater core cover-to-heater assembly screws and the cover

   Heater core-to-heater assembly screws and the heater core
   
   

   

   

   Fig. View of the heater hoses and clamp positions-Bonneville and LeSabre

   
   
   

   

   

   Fig. View of the heater core cover-Bonneville and LeSabre
   
   

To install:

1. Install or connect the following:
   
   
   Heater core and the heater core-to-heater assembly screws, then, tighten the screws to 12 inch lbs. (1.4 Nm)

   Heater core cover and the cover-to-heater assembly screws, then, tighten the screws to 12 inch lbs. (1.4 Nm)

   HVAC programmer and connect the electrical connector

   Temperature valve actuator

   Instrument panel compartment and connect any necessary electrical connectors

   Right sound insulator

   Heater hoses to the heater core
   
   
2. Refill the cooling system.
3. Connect the negative battery cable.
4. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

1. Disconnect the negative battery cable.
2. Drain the cooling system into a clean container for reuse.
3. Remove or disconnect the following:
   
   
   Heater hoses from the heater core

   Center console assembly

   Auxiliary air distribution duct

   Heater core heat shield cover from the HVAC module

   Air filter access cover and the heater core cover screws

   Heater core cover to obtain access to remove the heater core

   Heater core retaining bolts and straps

   Heater core
   
   

   

   

   Fig. Using Hose Clamp Pliers tool J-37097-A remove the heater hoses clamp-Park Avenue

   
   
   

   

   

   Fig. View of the heater core cover-Park Avenue

   
   
   

   

   

   Fig. View of the heater core-Park Avenue
   
   

To install:

1. Install or connect the following:
   
   
   Heater core

   Heater core straps and retaining bolts, then, tighten to 18 inch lbs. (1.5 Nm)

   Heater core cover

   Air filter access cover and the heater core cover screws, then tighten to 12 inch lbs. (1.4 Nm)

   Heater core heat shield cover to the HVAC module

   Auxiliary air distribution duct

   Center console assembly

   Heater hoses to the heater core
   
   
2. Refill the cooling system.
3. Connect the negative battery cable.
4. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.