Turbocharger – Failure Symptoms and Possible Causes

Failure Symptoms and Possible Causes

Black smoke

  • Boost pressure control rotary valve/poppet valve does not close
  • Lube air filter system
  • Dirty compressor or charge air cooler
  • Cracked/missing or loose gaskets in the engine air intake
  • Excessive flow resistance in the exhaust system / leakage upstream of the turbine
  • Foreign body damage to the compressor or turbine
  • Fuel system/injection system defective or incorrectly adjusted
  • Insufficient oil supply in the peat loader
  • Suction and pressure pipe distorted or leaking
  • Turbine housing/valve damaged
  • Damage to turbo bearings
  • Valve guide, piston rings, engine or cylinder liners worn/increased knock

Blue smoke

  • Coke and deposits in the center of the turbocharger
  • Crankcase ventilation blocked and distorted
  • Lube air filter system
  • Dirty compressor or charge air cooler
  • Excessive flow resistance in the exhaust system / leakage upstream of the turbine
  • Oil supply and drain pipes clogged, leaking or distorted
  • Piston ring seal defective
  • Damage to turbo bearings
  • Valve guide, piston rings, engine or cylinder liners worn/increased knock

Turbocharger generates acoustic noise

  • Dirty compressor or charge air cooler
  • Cracked/missing or loose gaskets in the engine air intake
  • Excessive flow resistance in the exhaust system / leakage upstream of the turbine
  • Exhaust gas leakage between the turbine exhaust pipe and the exhaust pipe
  • Foreign body damage to the compressor or turbine
  • Insufficient oil supply in the peat loader
  • Suction and pressure pipe distorted or leaking
  • Turbine housing/valve damaged
  • Damage to turbo bearings

Boost pressure is too high

  • Boost pressure control rotary valve/poppet valve does not open
  • Fuel system/injection system defective or incorrectly adjusted
  • Pipe ass vest. rotary valve/poppet valve defective

Defective compressor/turbine wheel

  • Foreign body damage to the compressor or turbine
  • Insufficient oil supply in the peat loader
  • Turbine housing/valve damaged
  • Damage to turbo bearings

Oil leakage at turbine

  • Coke and deposits in the center of the turbocharger
  • Crankcase ventilation blocked and distorted
  • Oil supply and drain pipes clogged, leaking or distorted
  • Piston ring seal defective
  • Damage to turbo bearings
  • Valve guide, piston rings, engine or cylinder liners worn/increased knock

High oil consumption

  • Coke and deposits in the center of the turbocharger
  • Crankcase ventilation blocked and distorted
  • Lube air filter system
  • Dirty compressor or charge air cooler
  • Excessive flow resistance in the exhaust system / leakage upstream of the turbine
  • Oil supply and drain pipes clogged, leaking or distorted
  • Piston ring seal defective
  • Damage to turbo bearings
  • Valve guide, piston rings, engine or cylinder liners worn/increased knock

Insufficient power/boost pressure too low

  • Boost pressure control rotary valve/poppet valve does not close
  • Lube air filter system
  • Dirty compressor or charge air cooler
  • Cracked/missing or loose gaskets in the engine air intake
  • Excessive flow resistance in the exhaust system / leakage upstream of the turbine
  • Foreign body damage to the compressor or turbine
  • Fuel system/injection system defective or incorrectly adjusted
  • Insufficient oil supply in the peat loader
  • Pipe ass vest. rotary valve/poppet valve defective
  • Suction and pressure pipe distorted or leaking
  • Turbine housing/valve damaged
  • Damage to turbo bearings
  • Valve guide, piston rings, engine or cylinder liners worn/increased knock

Oil leakage at compressor

  • Coke and deposits in the center of the turbocharger
  • Crankcase ventilation blocked and distorted
  • Lube air filter system
  • Dirty compressor or charge air cooler
  • Excessive flow resistance in the exhaust system / leakage upstream of the turbine
  • Oil supply and drain pipes clogged, leaking or distorted
  • Piston ring seal defective
  • Damage to turbo bearings
  • Valve guide, piston rings, engine or cylinder liners worn/increased knock

Get Full Support

MOOCAR — as a leading exporter, we are continually developing breakthrough sensing and actuating solutions to help optimize emissions control, fuel economy, and drivability. In addition to the above parts, we offer full support of data, market information.

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