Inspection After Removal

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the turbochargers for external leaks. If an oil leak or soot trace is present from the bearing housing clamps, the leaking turbocharger must be replaced.

WARNING:

To avoid the risk of injury to eyes and skin, when using caustic solutions, solvents, acids, or alkaline materials follow the manufacturer's recommendations for use and wear appropriate eye protection and protective clothing. Some of these materials are also flammable. To avoid risk of fire or burns, never smoke or allow sparks or flames (such as pilot lights, electrical switches, or welding equipment) in the work area. Avoid spilling onto a hot exhaust manifold which can cause a fire.
When using high-pressure water or steam cleaning equipment, to avoid the risk of personal injury from flying debris and hot steam:
- Wear appropriate eye protection and protective clothing including gloves and a face shield.
When using compressed air for cleaning, to avoid the risk of personal injury from flying debris and dirt:
- Do not exceed 207 kPa (2.111 kg/cm ² , 30 psi).
- Wear appropriate eye protection and protective clothing including gloves.

Remove all carbon deposits.
Use solvent or steam to clean the exterior of the turbocharger.
Dry with compressed air.

Inspect the turbocharger gasket and O-ring surfaces for cracks and other damage.
Surfaces for inspection include:
- Gasket surface between low-pressure and high-pressure turbocharger turbine housings.
- Exhaust transfer tube joints.
- Low-pressure turbocharger housing to the exhaust bypass tube.
Inspect the compressor housings and turbine housings for cracks.
If damage is found, replace the damaged turbocharger or the high-pressure and low-pressure turbocharger as an assembly.
Inspect the compressor blades of the turbocharger for damage.
NOTE: A mirror or borescope can be used to inspect the high-pressure turbocharger compressor wheel.
If damage is found, replace the damaged turbocharger.
If the engine experiences a turbocharger malfunction or any other occasion in which oil or debris is put into the charge-air system, the charge-air system must be inspected. If damage is found, replace charge-air system components as necessary.
If the engine experiences a turbocharger malfunction or any other occasion where oil is put into the exhaust the aftertreatment components must be inspected. Inspect the diesel oxidation catalyst (DOC)/diesel particulate filter (DPF) assembly.

These components that are integral to the turbocharger assembly and need to be cleaned and inspected when replacing the turbocharger assembly.
- Turbocharger compressor bypass valve.
- Turbocharger compressor bypass valve actuator.
- Rotary turbine control valve linkage.
- Air intake connection.
- Turbocharger oil supply line.
- High-pressure turbocharger drain line.
- Turbocharger compressor outlet connection.
- Low-pressure turbocharger boost pressure sensor and tube.
- Turbocharger speed sensor.