Bimetal Vacuum Switching Valve (BVSV)
- 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.
- 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)