Pontiac FIREBIRD 1972 Service Manual page 49

1-28 1972 PONTIAC SERVICE MANUAL
Fig. 1-27 Heater Hose Routing
-
B Series
2. Disconnect heater hoses at their connections beside
the air inlet assembly.
3. Remove retaining nuts from core case studs on the
engine side of the dash.
4. Inside vehicle, remove glove compartment and door
(F Series only) and heater outlet from heater case (F
Series only).
5. Remove defroster duct retaining screw from heater
case and pull the entire heater assembly from the
firewall.
6. Disconnect heater control cables and all electrical
connectors from the heater assembly and remove as-
sembly. On G Series, disconnect vacuum hoses.
7. Remove the core tube seal and core assembly retain-
ing strips and remove core.
8. Install the replacement core. Be sure the core to case
sealer is intact before installing core. Use new sealer
if necessary.
9. Install core retaining strips and core tube seal.
10. Within the vehicle, insert the studs on heater through
the holes in cowl and blower and air inlet assembly.
Install the case to firewall mounting nuts (on engine
side). It may be necessary to first insert coolant tubes
through the dash followed by the studs.
1 1. Connect heater control cables and electrical connec-
tors. Check cable operation and adjust if necessary.
12. Connect heater hoses, being careful to install them in
their proper locations.
13. Refill radiator.
For heater core and case installation refer to Figs. 1-25 (B
Series), 1-21 (G Series), 1-22 (A Series) and 1-32 ( F Se-
ries).
REMOVE AND REPLACE
-
X SERIES
1. Disconnect battery.
2. Drain radiator.