Pontiac FIREBIRD 1972 Service Manual page 44

HEATING AND VENTILATION 1-23
TWIST TAB 45O AT INSTALLATION ALL FOUR TABS
MUST BE I N THE SLOTS PROVIDED O N THE DEFROSTER &
NOZZLE MUST BE DRAWN UP UNTIL IT BOTTOMS I N
SLOTS I N INSTRUMENT PANEL
SECTION B-B
c - 4 y
HEATER DUCT
(WITH STEREO TAPE)
Fig.
1-22
A Series Heater Duct Installation
REMOVE A N D REPLACE
-
X SERIES
1. Remove heater core and case assembly from car
(steps 1 through 8 of heater core replacement proce-
dure).
2. Remove (2) upper defroster nozzle attaching screws.
3. Remove lower attaching screw and washer and
remove defroster nozzle (Fig. 1-24).
4. Replace defroster nozzle and (3) attaching screws.
5. Replace heater core and case assembly (steps 12
through 16 of heater core replacement procedure).
HEATER OUTLET DUCT
REMOVE A N D REPLACE
-
ALL
1. Remove screw(s) retaining outlet to heater case and
remove duct.
2. To replace, reverse removal procedure,
DEFROSTER DIAPHRAGM
REMOVE A N D REPLACE
-
G SERIES
1. Disconnect vacuum hose from diaphragm (Fig. 1-
2 1).