Heater Cores and Blower Fans
Pontiac Sunfire

How do you change the heater core on a 1998 Pontiac Sunfire?

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June 12, 2009 11:17PM

Caution:On models equipped with Delco-Loc 2 or Theftlock

audio systems make sure you have activation code * Disconnect the

negative battery cable * Drain the cooling system * Disconnect the

heater hoses at the heater core inlet and outlet on the engine side

of the firewall and plug the open fittings * From the inside of the

car remove the lower right dash insulator panel and the glove box *

Disconnect the ducts from the heater cover * Remove the instrument

panel from the passanger compartment * Remove the heater core cover

* Remove the heater core clamp bolts and clamps then slide the

heater core out carefully * Installation is reverse of removal

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