1991 Oldsmobile Ciera Heater Core

Tiny
DBEANIE
  • MEMBER
  • 1991 OLDSMOBILE CIERA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 197,000 MILES
I need to replace my heater core and I was just wondering where it was located and how to replace it. I have done heater cores before, but I have not done one in this car, so any help would be great, not sure if it is under the dash or in the engine compartment.
Thanks
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Tuesday, February 3rd, 2009 AT 8:08 AM

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Tiny
BLUELIGHTNIN6
  • EXPERT
Hello
Your heater core is located in the dash. Replacement procedures are as follows:

REMOVAL:
Disconnect the negative battery cable and drain the cooling system.
Disconnect the heater hoses from the heater core inlet and outlet connections in the engine compartment.
Allowing residual coolant from the heater core to drain. Cap the openings.
Working inside the vehicle, remove the lower instrument panel sound insulator.
Remove the heater floor outlet duct screws or clips and remove the duct.
Remove the heater core cover by removing the attaching screws and clips.
Remove the heater core cover.
Remove the heater core retainers and remove the heater core.

(((Removing the heater floor outlet duct screws or clips)))


http://www.2carpros.com/forum/automotive_pictures/261618_0900c152800cc5e2_1.jpg



(((Removing the heater floor outlet duct)))


http://www.2carpros.com/forum/automotive_pictures/261618_0900c152800cc5e2_2.jpg



(((Removing the mounting bolts which retain the heater core)))


http://www.2carpros.com/forum/automotive_pictures/261618_0900c152800cc5e2_3.jpg



INSTALLATION:
Position the heater core in the housing and install the retaining straps.
Position the heater core cover on the housing and install the attaching screws and clips.
Install the floor outlet duct and attaching screws or clips.
Install the lower instrument panel sound insulator.
Working in the engine compartment, connect the heater core inlet and outlet hoses.
Fill the cooling system.
Start the engine and check for coolant leaks. Allow the engine to warm up sufficiently to confirm the proper operation of the heater.
Recheck for leaks. Check the cooling system level.

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Tuesday, February 3rd, 2009 AT 9:33 AM

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