Ford Trucks and SUVs
Heater Cores and Blower Fans

What is the easiest way to change a heater core in a 1990 Ford truck?

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Wiki User
2005-03-19 02:14:02
2005-03-19 02:14:02

remove 2 hoses connected to the heater from the engine compartment. remove the glovebox. remove 7(Seven) screws surrounding the heater core housing.(screws should be located behind the glove box.) remove the heat/ac control arm from the heater core housing.(lift up on the metal tab and pull) remove the 2(two) wires from the core housing. slide the housing down and out. push the old heater core out and down to remove. install new heater core. replace all gaskets with some simple gasket maker. replace the housing back along with the screws, wires, and heater/ac control arm. install both hoses again. run the truck with radiator cap off for a couple minutes to bleed out any air left. add water/antifreeze mix into the resovoir, when fluid spills from the radiator cap, tighten cap on. your finished

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