Turbocharger and Components Cleaning and Inspection

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GM4918172

Courtesy of GENERAL MOTORS COMPANY

NOTE: Callouts items in the following chart represent components shown in graphic above.

Turbocharger and Components Cleaning and Inspection

Callout	Component Name
1	Turbocharger Procedure Clean all mating surfaces. Inspect all threaded holes for damage. NOTE: PCV fluids and combustion product buildup are common and not a sign of failure. Inspect the compressor and turbine blades for bent or broken conditions, and foreign material. NOTE: Do not replace the turbocharger if cracks are found on the turbocharger inlet flange partition wall. Replacement should only be performed if external leaks are present or a section is loose or missing. Inspect the turbocharger compressor inlet, compressor outlet, turbine inlet, and turbine outlet surfaces for damage. Replace the turbocharger if damage is found. NOTE: A new PCV tube and fitting are included with a new turbocharger assembly. Replace the turbocharger if damage is found. Refer to Compressor Air Intake Turbocharger Replacement .
2	Turbocharger Bypass Valve Solenoid Procedure Inspect the bypass valve solenoid for damage. Replace if necessary.
3	Turbocharger Wastegate Regulator Solenoid Valve NOTE: Do not disassemble solenoid valve from bracket. Procedure Inspect the solenoid valve and bracket for damage. Replace if necessary.
4	Turbocharger Wastegate Regulator Solenoid Valve Hose [3x] Procedure Inspect the turbocharger wastegate regulator solenoid hoses for damage. Replace the hoses if necessary.
5	Turbocharger Wastegate Actuator Procedure Inspect the turbocharger wastegate actuator. Inspect the wastegate actuator rod for damage or tampering. Replace the wastegate actuator if damage is found.
6	Turbocharger Oil Feed Pipe Procedure Inspect the pipe. Replace if necessary.
7	Turbocharger Coolant Return Pipe Procedure Inspect the pipe. Replace if necessary.
8	Turbocharger Coolant Feed Pipe Procedure Inspect the pipe. Replace if necessary.
9	Turbocharger Oil Return Pipe Procedure Inspect the pipe. Replace if necessary.