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heater core 1989 f150 replacement

91xltlariat

Pennsylvania Chapter Member
74
4
Drain the cooling system to a level below the heater core.


Disconnect the coolant hoses at the heater core tubes.

Remove the glove compartment.

Disconnect the temperature and function cables.

From inside the passenger's compartment, remove the 7 screws that secure the heater core access cover to the plenum chamber. Remove the cover.

Remove the heater core.

Installation is the reverse of removal. Replace any damaged sealer.
 

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