Chrysler Full-Size Vans 1967-1988 Repair Guide

Auxiliary Heater Core

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REMOVAL & INSTALLATION



1967-77 Models

See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Auxiliary heater and related components for 1977 and earlier vehicles

  1. Drain the cooling system.
  2.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. From under the van, disconnect the hoses at the core tubes.
  2.  
  3. Remove the 4 screws that retain the heater assembly to the floor.
  4.  
  5. Remove the 4 screws that retain the cover to the heater and lift off the cover. The core will come with it.
  6.  
  7. Installation is the reverse of removal. Replace any damaged sealing material.
  8.  

1978 Models

See Figure 2

Click image to see an enlarged view

Fig. Fig. 2: Auxiliary heater and related components for 1978 vehicles

WITHOUT AUXILIARY AIR CONDITIONING
  1. Drain the cooling system.
  2.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. From under the van, disconnect the hoses at the core tubes.
  2.  
  3. Remove the 4 screws that retain the heater assembly to the floor.
  4.  
  5. Remove the 4 screws that retain the cover to the heater and lift off the cover. The core will come with it.
  6.  
  7. Installation is the reverse of removal. Replace any damaged sealing material.
  8.  

WITH AIR CONDITIONING
  1. Drain the cooling system.
  2.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. From under the van, disconnect the hoses at the core tubes.
  2.  
  3. Remove the auxiliary housing lower cover screws.
  4.  
  5. Remove the heater core tube seal and cover plate.
  6.  
  7. Remove the 2 screws that retain the heater core support bracket and remove the bracket.
  8.  
  9. Remove the heater core from the housing.
  10.  
  11. Installation is the reverse of removal. Replace any damaged sealing material.
  12.  

1979-88 Models

See Figure 3

Click image to see an enlarged view

Fig. Fig. 3: Auxiliary heater and related components for 1979-88 vehicles

  1. Disconnect the battery ground cable.
  2.  
  3. Drain the cooling system.
  4.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Disconnect the hoses at the core.
  2.  
  3. Remove the nuts that mount the heater to the floor pan.
  4.  
  5. Disconnect the blower wiring at the blower and remove the heater assembly from inside the van.
  6.  
  7. Remove the cover screws and lift off the cover. The core is attached to the cover.
  8.  
  9. Installation is the reverse of removal. Replace any sealing material.
  10.  

 
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