Special Tool

EN-49942:  Holding Wrench

For equivalent regional tools, refer to Special Tools .

Fig 1: Holding Wrench And Ratchet Wrench
Courtesy of GENERAL MOTORS CORP.
1. Install the EN-49942:  holding wrench (2) to the turbocharger coolant feed pipe. Guide a ratchet wrench (1) along with an extension through EN-49942:  holding wrench to the turbocharger coolant feed pipe hollow screw.
Fig 2: Holding Wrench And Extension
Courtesy of GENERAL MOTORS CORP.
NOTE: EN-49942:  holding wrench (2) should be installed to turbocharger coolant feed pipe as shown. The holding wrench should be installed to avoid twist of the turbocharger coolant feed pipe during the loosening procedure.
2. Loosen the turbocharger coolant feed pipe hollow screw with ratchet wrench and extension (1).
Fig 3: Turbocharger Oil Return Pipe
Courtesy of GENERAL MOTORS CORP.
3. Remove the turbocharger coolant feed pipe hollow screw (3) and the 2 seal rings (1) and (2).
4. Disconnect the turbocharger oil return pipe (4) from the engine block.
Fig 4: Turbocharger Oil Feed Pipe
Courtesy of GENERAL MOTORS CORP.
5. Remove the turbocharger oil feed pipe bolt (5) from the oil cooler.
6. Remove the turbocharger oil feed pipe hollow screw (4) and the 2 seal rings (1) and (3) and close the screw bore in the turbocharger.
7. Remove the turbocharger oil feed pipe (2) and the rubber seal ring.
8. Disconnect the turbocharger coolant return hose (6) from the oil cooler coolant inlet pipe and remove the turbocharger coolant return pipe bolt (7) from the oil cooler.
Fig 5: Turbocharger Nuts
Courtesy of GENERAL MOTORS CORP.
9. Remove the 8 turbocharger nuts (1).
Fig 6: Turbocharger Assembly And Turbocharger Gasket
Courtesy of GENERAL MOTORS CORP.
10. Remove the turbocharger assembly (1) and the turbocharger gasket (2).