2002 Chevy Blazer heater core replacment

Tiny
CARLOS_GONZALEZ_JR
  • MEMBER
  • 2002 CHEVROLET BLAZER
Heater problem
2002 Chevy Blazer 6 cyl Two Wheel Drive Automatic

What is the process of heater core replacement
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Friday, April 3rd, 2009 AT 10:42 AM

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Tiny
BLUELIGHTNIN6
  • EXPERT
REMOVAL:
Remove the HVAC module-auxiliary.
Remove the screws from heater core cover-auxiliary from the HVAC module-auxiliary.
Remove the heater core cover-auxiliary.
Remove the HVAC module pass thru seal-auxiliary.
Remove the heater core-auxiliary from the HVAC module-auxiliary.

INSTALLATION:
Install the heater core-auxiliary to the HVAC module-auxiliary.
Install the HVAC module pass thru seal-auxiliary.
Install the heater core access cover-auxiliary to the HVAC module-auxiliary.
Install the screws to the heater core access cover-auxiliary and tighten to 18 inch lbs. (2 Nm).
Install the HVAC module-auxiliary.

HVAC MODULE REMOVAL/INSTALLATION:
Recover the refrigerant.
Drain the cooling system.
Raise and support the vehicle.
Remove the nuts from rear A/C line block fittings.
NOTE
Cap or tape the open A/C refrigerant lines immediately.

Remove the A/C line block fittings and discard the O-ring seals.
Remove the nuts from the heater hoses block fittings.
Remove the heater hoses block fittings from the HVAC module-auxiliary.
Remove the nuts from the HVAC module studs.
Lower the vehicle.
Remove the right side rear quarter trim.
Disconnect the electrical connectors from the HVAC module.
Disconnect the rear compartment air outlet ducts from the HVAC module.
Remove the mounting bolts from the HVAC module.
Remove the HVAC module.
Remove and discard the HVAC module pass through seal.

To install:
Install new HVAC module pass through seal.
Install the HVAC module.
Install the HVAC module mounting bolts and tighten to 89 inch lbs. (10 Nm).
Install the air outlet ducts.
Connect the electrical connectors.
Install the right side rear quarter trim panel.
Raise and support the vehicle.
Connect the heater hoses to the heater core.
Install the nuts to the HVAC module studs. Tighten the nuts to 89 inch lbs. (10 Nm).
Remove the cap or tape from the A/C lines.
Install the new O-ring seals.
Install the nuts to the evaporator core studs and tighten to 15 ft. Lbs. (20 Nm).
Lower the vehicle.
Fill the cooling system.
Evacuate and charge the system.
Leak test the fitting of the component.

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Friday, April 3rd, 2009 AT 1:27 PM

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