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Bimetal Vacuum Switching Valve (BVSV)

  1. Drain coolant and remove BVSV. Place sensing portion in cool water (do not allow water into valve). Air should not pass through valve when water is below switching point.
  2. Heat water and repeat test. Air should pass through valve when above switching temperature. If not, replace valve.
    BVSV Test Temperatures

    Application Closed Below °F(°C) Open Above °F(°C)
    Celica, Corona, Land Cruiser, Pickup 86 (30) 111 (44)
    Corona 104 (40) 129 (54)
    Cressida, Supra 122 (50) 147 (64)