Pontiac firebird 1968 - Page 25

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1968 PONTIAC SERVICE MANUAL
4. Inside the vehicle pull the entire heater as-
sembly from the firewall.
5. Remove the bowden cables and all electrical
connectors from the heater assembly and remove
assembly.
6. Remove the core tube seal and core assembly
retaining springs and remove core.
7. Install the replacement core.
NOTE: Be sure the core to case sealer is in-
tact before installing core. Use new sealer if
necessary.
8. Install core retaining springs and core tube
seal.
9. Within the vehicle insert the five studs on
heater through the holes in cowl and blower and air
inlet assembly. Install the case to firewall mounting
nuts (on engine side).
NOTE: It may be necessary to first insert coolant
tubes through the dash followed by the five studs.
10. Replace the remaining bowden cables and elec-
trical connectors.
11. Replace heater hoses, being careful to install
them in their proper location.
12. Refill radiator.