Category Archives: GM 6.5

Legend 1. EGR Control Pressure/BARO Sensor 2. EGR Vent Solenoid 3. EGR Solenoid 4. Wastegate Solenoid 5. Vacuum Pump 6. Turbo Charger Wastegate 7. EGR Valve Legend 1. Cylinder 2 2. Cylinder 4 3. Cylinder 6 4. Cylinder 8 5. Cylinder 7 6. Cylinder 5 7. Cylinder 3 8. Cylinder 1  

Remove or Disconnect (Figure 13) 1. Vacuum hose 2. E-clip retainer from the waste-gate lever pin. • Access may be improved by removing the tur­bocharger heat shield. 3. Two waste-gate bracket mounting bolts. 4. Waste-gate actuator. Install or Connect (Figure 13) 1. Waste-gate actuator assembly to turbocharger. 2. Shaft pin into lever hole. 3. Two… Read More »

The turbocharger assembly consists of the turbo­ charger housing, internal components, the waste-gate actuator, exhaust elbow, and heat shield. Remove or Disconnect (Figures 2, 9, 10 and 11) 1. Negative battery cables. Refer to SECTION OA. 2. Upper intake manifold cover. 3. Self tapping screw holding CDR valve tube on top of turbocharger. 4. CDR… Read More »

Tools Required: J 39307 Adapter J 28474 Turbo Compound Gage CAUTION: Do not perform this test with any­ one in the area around the vehicle. The wheels of the vehicle should be blocked to prevent the vehicle from moving forward. Failure to fake proper precautions may result in personal injury and damage to the vehicle.… Read More »

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.… Read More »

Turbochargers are extremely reliable units. The majority of inoperative turbochargers are caused by dirt in the oil, oil lag (lack of oil flow), foreign objects or debris entering the turbocharger, and plugged or restricted air cleaner systems. Lack of power, black smoke, blue smoke (excess oil consumption), or other engine performance problems are frequently blamed… Read More »