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john aka eauto
john aka eauto, The Car Guy
Category: Buick
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Experience:  15 years as a auto tech
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2003 buick lesabre heater core location reoval tips

Resolved Question:

2003 buick lesabre heater core location reoval tips
Submitted: 7 years ago.
Category: Buick
Expert:  john aka eauto replied 7 years ago.

HEATER CORE REPLACEMENT (Without RPO Code DO7)

TOOLS REQUIRED
J 38185 Hose Clamp Pliers

REMOVAL PROCEDURE

  1. Drain the cooling system.
  2. Remove the fuel injector sight shield.

  1. Position the J 38185 in order to remove the heater hose clamps.
  2. Remove the heater hoses from the heater core.
  3. Remove the left side sound insulator.
  4. Remove the right side sound insulator.

  1. Remove the air distributor duct screws (1,2). IMPORTANT: Due to the difficulty in the removal of the right side screw (2), it will not be necessary to install upon reassembly.
  2. Remove the air distributor duct.

  1. Remove the heater core heat shield screws.
  2. Remove the heater core heat shield.
  3. Remove the heater core cover screws (1).
  4. Remove the heater core cover.
  5. Remove the retaining screw and strap from the heater core.
  6. Remove the heater core.

INSTALLATION PROCEDURE

  1. Install the heater core into the HVAC module.
  2. Secure the heater core into the HVAC module using the attaching straps and screws. NOTE: Refer to Fastener Notice in Service Precautions. Tighten Tighten the screws to 1.4 N.m (12 lb in) .
  3. Install the heater core cover.
  4. Ensuring the seals at the front of dash are in the proper positions, install the heater core cover screws. Tighten Tighten the screws to 1.4 N.m (12 lb in) .
  5. Install the heater core heat shield.

  1. Install the heater core heat shield screws (1). Tighten Tighten the screws to 1.4 N.m (12 lb in) .
  2. Install the air distributor duct.

  1. Install the air distributor duct left side screw (1). Ensure the right tab is seated properly. Tighten Tighten the screw to 1.4 N.m (12 lb in) .
  2. Install the left side sound insulator.
  3. Install the right side sound insulator.

  1. Install the heater hoses and clamps using the J 38185.
  2. Install the fuel injector sight shield.
  3. Fill the cooling system.

 

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