GM/Detroit 6.5L TURBOCHARGER – INSPECTION OF THE WASTE GATE ACTUATOR ASSEMBLY

The waste-gate actuator assembly can be replaced separately from the turbocharger assembly. To check operation of the waste-gate actuator (figures 1 and 2):

Tool Required:
J 23738 Hand Operated Vacuum Pump
1. With the engine off, inspect actuator rod and lever. The actuator rod and lever should move back and forth without any tension.
2. Apply 5 inches HG vacuum to actuator, actuator rod and lever should close the waste-gate. Look for the rod to move toward the front of the engine.

If the rod does not snap back to a closed position, the waste-gate actuator is defective and should be replaced. For removal of the waste-gate actuator, refer to “Waste-Gate Actuator Replacement.”

 

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