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