Pontiac FIREBIRD 1972 Service Manual page 156

CUSTOM AIR CONDITIONING 1A-97
z T
'
DEFROSTER NOZZLE
'I+@-
ORE AND
ASE ASM.
.
A
A
-ADAPTER
COLD AIR
DUCT
Fig. 1A-1 19 B Series A/C Heater Core and Case Installation
9. Disconnect A/C temperature cable at heater case.
10. Disconnect vacuum hoses from diaphragms on
heater case and remove core and case assembly from
car.
11. Remove core from case (3 screws).
12. To replace core, reverse removal procedure. If case is
to be replaced, transfer parts (cam, diaphragms, etc.)
to new case. Refer to Fig. 1A-119 for installation of
core and case assembly.
REMOVE AND REPLACE
-
A AND G SERIES
1. Drain coolant.
2. Remove two water hoses attached to heater core.
3. Remove lower duct and outlet assembly.
4. Remove glove box.
5. Remove defroster duct attaching screw.
6. Remove screws retaining case to dash
7. Move core and case assembly rearward to free attach-
ing studs from cowl and remove core and case assem-
bly.
8. Disconnect cables and wire connectors.
9. Adequately mark heater cam and bracket assembly
in three places to insure proper reinstallation.
10. Remove heater cam and bracket assembly.
11. Remove front case to rear case attaching screws.
12. Separate front and rear case.
13. Remove screws retaining core attaching bands and
remove core.
14. Replace by reversing the above procedure. See Fig.
1A-120.
CORE REMOVE AND REPLACE
-
F SERIES
1. Drain coolant.
2. Remove glove compartment and door.
3. Remove cold air duct (lower right hand duct).