Fault Diagnosis

A turbo failure is a rare occurrence as the problems usually stem from other parts of the engine.


Fault fact sheets

There are various reasons why a turbocharger fails. Do bear in mind that turbochargers usually fail because of external problems and not because of the turbocharger itself.


4 Reasons why a Turbocharger Fail:


1. Foreign Object Impact

Compressor Side

  • Dirt introduced during installation of turbocharger
  • Broken air filter mesh
  • Dirty induction system
  • Broken air hoses or piping


Turbine Side

  • Fractured / broken engine components
  • Debris from cracked exhaust manifold
  • Debris from broken gaskets


2. Oil Contamination

  • Dirt introduced during servicing
  • Presence of other fluids inside the engine
  • Damaged/worn out internal parts of the engine
  • Low quality engine oil and oil filter
  • Oil filter bypass valve malfunctioned
  • Blocked oil filter


3. Inconsistent Oil Supply

Oil Delay

  • Installation of turbo without adequate oil priming
  • Restricted or dented oil feed pipe
  • Failure to pre-crank the engine at least 3-4 times after installation or long period of non-use
  • Immediate high engine speed just after turbo installation or long period of non-use
  • Failure to prime oil into oil filter

Oil Starvation

  • Use of RTV / gasket glue during installation
  • Bent or kinked oil feed pipe
  • Carbon deposits or sludge clogged inside oil feed lines
  • Sludge or carbon deposits build up at oil strainer inside crankcase
  • Oil cooler distorted or blocked (if applicable)


4. Extreme Temperature

  • Air piping loose / exhaust gas leaks / broken gaskets
  • Back pressure from restricted exhaust system
  • Restricted induction system
  • Improper calibration of Fuel Injection Pump (F.I.P)
  • F.I.P nozzle jammed / leaking
  • Actuator malfunctioned / jammed