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Asia's largest turbocharger distributor for Garrett, Mitsubishi, IHI, Borg Warner, Holset and Schwit

Time:2012-04-06 14:56Turbochargers information Click:

Turbo Tu Turbo One Pte. Ltd.

Turbocharger rotor operates at high speed on very thin film of oil. Loss of this oil film for a repetitive short duration of 4-5 sec can lead to metal-to-metal contact, wheel-to-housing rub and turbocharger failure.

Indications:
• Deformation of turbine housing.


 


• Low/ no oil levels.

• Heat discolouration on shaft.
 


• Repeated hot shutdown.
Extreme turbo temperatures are caused by excessive exhaust temperatures and can damage turbo during operation or shutdown.

Indications:
   to over deliver fuel.


• Blockage at oil drain cavity of

• Malfunctioning of oil filter bypass

• Erosion of the turbine wheel.

 

• Foreign objects such as screws, nuts, and bolts entering the compressor

• Polishing and scoring on critical

   rotation speed.

Causes:

 

LUBRICATION-RELATED

• Engine wear or manufacturing

Causes:

FOREIGN OBJECT DAMAGE

Foreign object damage is caused by foreign materials entering the turbine/compressor housing and impacting the turbine or compressor wheel.

This leads to a lost of efficiency and unbalance rotation, ultimately resulting in turbo failure.
 

• Oil contamination.


   piston impacting the turbine wheel.

Causes:


EXTREME TEMPERATURE

• Failure to crank the engine after oil filter change.


• Coked bearing housing.
• Poor quality oil carbonising.

 

Foreign materials in oil, metal shavings, abrasives from inadequate filtration and dilution can score the bearings and destroy the oil film that supports the shaft. Dirty oil damages the turbocharger with heavy scoring of critical bearing surfaces.

Causes:
• Excessive oil temperature.

1. Dirt In Oil
  surfaces such as journal/thrust

   housing as a result of negligence.

• Debris from exhaust manifold, cracked turbine housing, engine valve and

 

   oil filter.
  bearing.

• Cracked turbine inlet flange/wall.

Damage Analysis

 


 


   bearing housing.

• Excessive exhaust temperature due to injection pump modifications

• Blocked, damaged or poor quality
• Carbonising due to poor oil quality.
• Long period of non use.

 

• Oil pump failures.

 

• Dirt introduced during servicing.
   debris.
2. Insufficient Lubrication

• Debris from damaged air filters.


• Kinked/ restricted/ broken oil feed pipes.
• Non-approved turbine housing specifications, causing excessive
   valve.
• Blocked oil filters.



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