Toyota Cressida/Corona/Crown/MarkII 1970-1982 Repair Guide

Bi-Metal Vacuum Switching Valve

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TESTING



  1. Drain the engine coolant.
  2.  
  3. Remove the vacuum hoses and remove the BVSV.
  4.  
  5. Cool the BVSV to 86°F.
  6.  
  7. Blow air through the valve. At this time the valve should be closed and not allow air to pass.
  8.  
  9. Heat the valve to 111°F. The valve should open and allow air to pass through.
  10.  
  11. Repeat Step 4.
  12.  
  13. If the valve is inoperative it must be replaced.
  14.  
  15. Apply a liquid sealer to the threads and replace the valve.
  16.  
  17. Reconnect the vacuum lines.
  18.  
  19. Refill the coolant.
  20.  

 
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