Subaru ff-1/1300/1400/1600/1800/Brat 1970-1984 Repair Guide

Heater Water Control Valve

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CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by 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.

REMOVAL & INSTALLATION



The water control valve may be replaced without removing the heater unit from the car.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Drain the engine coolant through the radiator drain plug.
  4.  
  5. Disconnect the heater hoses in the engine compartment.
  6.  
  7. Remove the rubber grommet that the heater hoses pass through on the kick panel inside the car. The location is slightly above and to the right of the accelerator pedal.
  8.  
  9. Remove the dash panel on the driver's side.
  10.  
  11. Remove the left defroster duct.
  12.  
  13. Remove the two screws that secure the control valve cover. One screw is located on the top, the other in the center of the cover.
  14.  
  15. Disconnect the control rod.
  16.  
  17. Loosen the hose clamps and remove the heater hoses.
  18.  
  19. Unfasten the three screws holding the water control in place and remove the valve.
  20.  

To install:

  1. Install the water control valve and tighten the three retaining screws securely.
  2.  
  3. Connect the heater hoses and tighten the hose clamps.
  4.  
  5. Connect the heater control rod.
  6.  
  7. Position the heater control valve cover and tighten the retaining screws.
  8.  
  9. Install the defroster ducts.
  10.  
  11. Install the dash panel.
  12.  
  13. Install the heater hose rubber grommets and connect the heater hoses.
  14.  
  15. Fill the radiator with coolant.
  16.  
  17. Connect the negative battery cable.
  18.  
  19. Start the engine and check for leaks.
  20.  

 
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