Nissan and Datsun Workshop Service and Repair Manuals

Turbocharger: Component Tests and General Diagnostics

Low Engine Power

1.

Air leak at connection between compressor housing and inlet tube or between inlet tube and intake manifold.

2.

Exhaust leak at connection between turbine housing and exhaust manifold, connecting tube or exhaust outlet.

3.

Bypass valve stuck open.

4.

Bearing or journal worn or seized.

5.

Broken shaft.

6.

Sludge on back of turbine wheel.

7.

Damaged turbine wheel.

Excessively High Engine Power

1.

Disconnected or cracked rubber hose.

2.

Bypass valve stuck closed.

3.

Controller diaphragm broken.

Excessively High Oil Consumption or Pale Blue Exhaust Smoke

1.

Oil leak at lubricating oil passage connection.

2.

Oil leak at turbine oil seal.

3.

Oil leak at compressor oil seal.

4.

Worn bearing or journal.