Turbocharger Wastegate Actuator Adjustment

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Allow the engine to cool.

Fig 1: Identifying Wastegate Arm Lock Nuts

Courtesy of GENERAL MOTORS CORP.

Loosen the lock nut (2).
Hand tighten the lock nut (1) until it is seated on the wastegate arm and slight spring tension is observed.

NOTE:

Ensure the wastegate actuator rod does not rotate during the tightening procedure. If the rod does rotate, it will be necessary to start the procedure again.
After the lock nut (1) has been tightened three complete turns, it should not move for the remainder of the procedure.

Mark the lock nut (1) with a paint pen to mark a starting position and tighten three complete turns.

CAUTION: Refer to Fastener Caution .

While holding the wastegate rod tighten the nut (2) hand tight.
Tighten the nut (2) while holding nut (1) in place to 10 N.m(89 lb in). Apply threadlock (P/N 12345493) to the wastegate actuator rod threads on both sides.