Volkswagen Front Wheel Drive 1974-1989 Repair Guide

Thermostat

Print

REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4, 5 and 6

  1. The thermostat is in the bottom of the water pump housing and the lower radiator hose connects to the thermostat housing. Place a large drain pan under the thermostat housing. On some models, it will be necessary to position the power steering pump aside.
  2.  



Click image to see an enlarged view

Fig. Fig. 1: If necessary, remove the power steering pump



Click image to see an enlarged view

Fig. Fig. 2: Hang the pump with a wire and position it aside

  1. Remove the radiator cap and drain the cooling system.
  2.  
  3. Loosen one bolt at a time until coolant begins to flow. Allow this residual coolant to drain into a pan.
  4.  



Click image to see an enlarged view

Fig. Fig. 3: The thermostat housing is secured by two bolts



Click image to see an enlarged view

Fig. Fig. 4: Slowly pull the housing away from the engine. Stand back and allow any residual coolant to drain into a pan

  1. Remove both bolts, then remove the thermostat. It's not necessary to disconnect the radiator hose.
  2.  



Click image to see an enlarged view

Fig. Fig. 5: Pull the thermostat out of the water pump housing. Once again, stand back to allow any left over coolant to drain

  1. Discard the O-ring on the thermostat housing.
  2.  



Click image to see an enlarged view

Fig. Fig. 6: Always replace the O-ring on the thermostat housing

To install:
  1. Place the thermostat into the water pump housing, then install the new O-ring. Install the housing and torque the bolts to 7 ft. lbs. (10 Nm).
  2.  
  3. Fill the cooling system. Start the engine and check for leaks.
  4.  

 
label.common.footer.alt.autozoneLogo