Ford Mustang (1999-2004) Service Manual: Heater Core

Removal

NOTE: If a heater core leak is suspected, the heater core must be pressure leak tested before it is removed from the vehicle. For additional information, refer to Section.

1. Remove the evaporator core housing. For additional information, refer to Evaporator Core Housing in this section.

2. Remove the foam weather seal.

Heater Core

3. Remove the screws and remove the heater core cover.

Heater Core

4. Remove the heater core.

Installation

1. NOTE: Be sure to install a new oval foam weather seal around the heater core inlet and outlet tubes.

To install, reverse the removal procedure.

    Evaporator Core Housing
    Material Item Specification PAG Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) WSH-M1C231- B MERPOL NA ESE-M99B144- B Removal NOTE: The evapor ...

    Evaporator Core Housing
    Disassembly 1. Remove the evaporator core housing. For additional information, refer to Evaporator Core Housing in this section. 2. Remove the foam weather seal. 3. Remove the screws and remove th ...

    Other materials:

    Engine Coolant Temperature (ECT) Sensor - Cobra
    Material Item Specification Pipe Sealant with Teflon D8AZ-19554-A WSK-M2G350-A2 Removal and Installation 1. Partially drain the engine cooling system. For additional information, refer to Section. 2. Disconnect the engine coolant te ...

    Input Shaft and Bearing
    Special Tool(s) Input Shaft Seal Replacer 308-220 (T94P-7025-AH) Pinion Bearing Cone Remover 205-D002 (D79L-4621-A) or Equivalent Disassembly 1. Using the special tool and a press, remove the input bearing (7025). 2. Remove t ...

    Engine Ignition (Description and Operation)
    Eight separate ignition coils (12029): are mounted directly above each spark plug (12405). are controlled by the powertrain control module (PCM) for correct firing sequence. The spark plug: changes the high voltage pulse into a spark which igni ...