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By-Pass Valve Controller

CAUTION: Do not apply more than 9.67 psi (.68 kg/cm2 ) to by-pass valve controller diaphragm.
  1. Check operation of by-pass valve controller by moving valve to make sure it is not sticking or scratched. Measure rod end play of by-pass valve controller by connecting a dial indicator to end of controller pushrod. Connect a pressure gauge to controller. See Fig 1 .
  2. Apply 6.3-7.1 psi (.44-.50 kg/cm2 ). Controller pushrod should move 0.015" (0.38 mm). Disconnect wastegate controller pushrod. Move wastegate lever back and forth and check for binding or sticking.
Fig 1: Testing By-Pass Valve Controller
G35099Courtesy of NISSAN MOTOR CO., U. S. A.