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The heater core is contained within the heater/air assembly. The assembly is divided by the firewall. Now if only the heater core is being removed there is no need to evacuate the refrigerant from from the air conditioning system or remove the blower motor/evaporator housing.

Disconnect the negative battery cable.

Drain the cooling system.

Disconnet the heater hoses at the firewall.

Remove the glove box and the sound insulator panel below the right side of the dash. ( To remove he glove box there should be two screws underneath , you simply unscrew them and detach the glove box from the instrument panel), and of course instsallation is reverse .

Disconnect the the rod from the programmer to the blend air door by squeezing the plastic connector and pulling it out of the arm.

Disconnect the vaccuum and electrical connectors from the programmer just to the right of the heater core housing

Remove the two heater core cover mounting screws and pull the heater core cover (with programmer still attached) away from the heater housing

Remove the two core mounting screws and carefully lower the heater/air condition assembly from under the dash.

Caution : Have some old rags handy to protect the carpet from any spills of coolant .

Installation is the reverse of removal. Note: Make sure to transfer any weather stripping/sealing material from the old core or cover to the new one.

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โˆ™ 2015-07-15 21:00:59
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Q: How do you replace the heater core in an '87 Cadillac Sedan DeVille?
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