Chevrolet Citation/Omega/Phoenix/Skylark 1980-1985 Repair Guide

Heater Core

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REMOVAL & INSTALLATION





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Fig. Fig. 1 Exploded view of the heater core and related system components



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Fig. Fig. 2 The heater inlet and outlet hoses connect to the core tubes at the firewall, below the wiper motor

Without Air Conditioning
  1. Drain the cooling system.
  2.  
  3. Remove the heater inlet and outlet hoses at the firewall, inside the engine compartment.
  4.  
  5. Remove the radio noise suppression strap.
  6.  
  7. Remove the heater core cover retaining screws. Remove the cover.
  8.  
  9. Remove the core. Reverse to install.
  10.  

With Air Conditioning
  1. Drain the cooling system.
  2.  
  3. Remove the heater hoses from the core tubes at the firewall.
  4.  
  5. Remove the heater duct and heater case side cover from under the instrument panel.
  6.  
  7. Remove the core retaining clamps. Remove the inlet and outlet tube support clamps.
  8.  
  9. Remove the core. Reverse to install.
  10.  

 
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