Heater Core

If a heater core leak is suspected, the heater core must be leak tested before it is removed from the vehicle. For additional information, refer to Section 412-00.

It is not necessary to install new heater core inlet and outlet tubes when installing a new heater core unless there is evidence of damage to the heater core tubes. The new O-ring seals supplied with the heater core service kit must be installed any time the heater core tubes are detached from the heater core.

1. 1
   Drain the engine coolant. For additional information, refer to Section 303-03.
2. 2
   Remove the 3 glove compartment screws and the glove compartment.

   • To install, tighten to 10 N·m.
3. 3
   Using a suitable utility knife, carefully cut the heater core tube cover along the rib as shown.

1. 1
   Detach the climate control wire harness connector from the heater core tube cover.
2. 2
   Remove the 2 heater core tube cover screws.
3. 3
   Remove the cut portion of the heater core tube cover.
4. 4
   NOTE: Before disconnecting the heater core tube connections, position a suitable drain pan to catch any residual coolant that may drain from the heater core or heater core tubes when disconnected.

   Remove the 2 heater core tube connection clips and disconnect the 2 heater core tubes from the heater core.

   • Discard the O-ring seals.
5. 5
   Detach and remove the heater core access door.
6. 6
   NOTE: The heater core must be carefully manipulated to clear the blower motor housing while being removed.

   Remove the heater core.

7. 7
   NOTE: Be sure that the new O-rings are installed, and the heater core tubes are fully seated into the heater core before installing the heater core tube connection clips.

   To install, reverse the removal procedure.

   • Install new O-ring seals.

   • Apply a suitable black duct-type tape over the cut in the heater core tube cover.
8. 8
   Fill the engine coolant level. For additional information, refer to Section 303-03.