Defect of turbocharger (4JJ3 without DPD)

1. When output has dropped although the engine appears to be normal

Deformed or broken turbine fins or compressor fins

Fins and housing make contact with each other.

Large amounts of carbon deposits adhering to the turbine exhaust outlet come into contact with the turbine fins

When manually turned, the turbine shaft catches on something or the rotation is heavy.

The clearance in the axial direction or rotational direction of the turbine shaft is large.

2. When output has dropped although the turbocharger appears to be basically normal.

Gas leakage from the exhaust sections

Excessive exhaust resistance caused by deformed exhaust muffler, etc., or carbon clogging

Contamination of the air cleaner element

Clogging in the intercooler cooling section

Defective boost pressure sensor

Problems with the vehicle, such as dragging of the brakes

Battery performance deterioration, and low voltage or excessive voltage due to a defective generator

3. When there are abnormal vibrations in the turbocharger.

The cause is bearing damage and contact of the rotating section with the surrounding sections. Degraded oil, foreign material entering the oil feed pipe, clogging of the oil filter, or repeated sudden starting and stopping can cause bearing failure.

If there is no problem in the lubricating oil system, but there is damage from contact found in the rotating section and the surrounding sections, it is probable that the rotating section has become unbalanced or the shaft has been bent. This is caused by bearing wear or damage on the turbine wheel or compressor wheel made by flying debris.

4. When oil is leaking into the exhaust or intake pipe, and the color of exhaust becomes white.

Clogging, collapsing, or deformation of the oil return pipe

Large turbine shaft axial direction clearance

Degraded engine oil

5. When noise is generated from the turbocharger.

Air leakage from coupling of the rubber hose, etc., on the compressor outlet side or gas leakage from the exhaust system

Contact of the turbine fins and housing

Damaged turbine wheel or compressor wheel due to foreign material pinching

Wear or stuck of the turbine shaft bearing

6. When excessive worn exists in the rotating section.

Degraded engine oil

Clogged turbocharger oil feed pipe

Engine oil pressure is low.