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.

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

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:
Pinpoint Test M: DTC B1891 - Air Bag Tone Warning Indicator Circuit
Shorted to Battery or
Ignition
Normal Operation
The restraints control module (RCM) monitors its connection to the
generic electronic module (GEM) at
pin 10. This connection is used to signal a chime if the air bag
indicator is inoperative and another SRS
fault exists. If the RC ...
Valve Cover RH
Removal and Installation
1. Remove the throttle body. For additional information, refer to
Section.
2. Disconnect the crankcase vent hose.
3. Remove the differential feedback exhaust gas recirculation (EGR) system
vacuum hoses and
the bracket bolts. Po ...
Weld Nut Repair - Stripped Weld Nut, Restraints
Control
Module (RCM)
WARNING: To avoid accidental deployment and possible personal
injury, the backup
power supply must be depleted before repairing or replacing any front or
side air bag
supplemental restraint system (SRS) components and before servicing,
replacing, ...
