3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
Wastegate Actuator: Adjustments
The content of this article reflects changes called for in TSB 26-06-98.
Turbocharger Wastegate
Proper adjustment of the wastegate assembly is critical to the operation of the wastegate turbocharger. The control rod is set at the factory and no
adjustment should be necessary, unless wastegate assembly is damaged.
CAUTION: DO NOT adjust the wastegate so that higher pressures are required to open the wastegate valve. The turbocharger speed will be increased
and can cause damage to the turbocharger and cause a loss of engine performance.
Wastegate And Dial Indicator
1. Connect regulated air pressure to the wastegate actuator. Install a dial indicator to measure the control rod movement. Apply 103 - 138 kPa (15 -
20 psi) to seat the components and take any slack out of the control rod. Release the air pressure and zero the dial indicator gauge.
2. Apply air pressure to the actuator.
Manual Trans .............................................................................................................................................................................. 193 kPa (28 psi)
Auto Trans ............................................................................................................................................................................... 144.7 kPa (21 psi)
CARB ....................................................................................................................................................................................... 158.5 kPa (23 psi)
The control rod should move 0.33 - 1.27 mm (0.013 - 0.050 in) total travel. If the rod travel is out of limits, the wastegate linkage must be
adjusted.
