How do I replace the heater core on my truck?

Tiny
ANONYMOUS
  • MEMBER
  • 1992 FORD F-150
  • 170,000 MILES
How do I replace the heater core on my truck?
Wednesday, January 2nd, 2013 AT 10:12 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
-Remove 7 screws attaching heater access cover to plenum. Disconnect vacuum source. Leave vacuum harness attached to cover. Remove cover. Remove heater core from plenum. To install, reverse removal procedure.

PLENUM ASSEMBLY
Loosen instrument panel attaching screws and move instrument panel back to access plenum. Disconnect and plug heater hoses from heater core. Remove glove box. Remove floor air distribution duct from plenum assembly. Remove 2 nuts retaining left end of plenum assembly to instrument panel.
Disconnect temperature control cable and vacuum hose connections from control panel assembly. See Fig. 2. Disconnect source vacuum block, which is secured to right heater core cover. Pull heater case forward to disengage 3 case studs from dash panel. Lower plenum assembly, and remove assembly from vehicle. See Fig. 3. To install, reverse removal procedure.
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Monday, April 19th, 2021 AT 3:14 PM

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