Turbo Failures

Reasons for Turbocharger Failure

There are three major reasons for turbocharger failure:

  • faulty lubrication,
  • excessive condensation,
  • and a lack of regularly scheduled maintenance.

Lubrication Failure –

Proper cooling and lubrication are vital to turbocharger operation.
Turbochargers are driven by hot exhaust gases
exiting the combustion chamber and, therefore,
are subject to extreme temperatures. In a Burst
& Containment Document authored by Honeywell [2], their Garrett Engineering group
provides an operating description of its smallestsw object damage
turbo product. The article states that the
turbocharger’s impellers operate up to 200,000
rpm and the exhaust gas temperature can reach a
max of 1800°F, causing the turbine housing to
glow red under certain driving conditions.
Circulating engine oil through the turbocharger
to remove heat and provide lubrication to
internal components ensures functional
operation. A lack of lubrication from degraded
engine oil or insufficient delivery from an
obstructed oil line can cause increased friction
and temperatures. In extreme cases of poor
lubrication and high operating temperatures,
moving components can become seized, locking
up the turbocharger and disabling operation of
the vehicle. Excessive Condensation –

Many high performance turbochargers are known for their
variable geometry turbines (VGT or VNT).
These units have controlled vanes, which help
increase or decrease impeller speed within the
turbine’s housing. Seized or sticking vanes
cause performance failures on this type of turbo.
Rust formations on the vanes, created by
excessive condensation build-up when a vehicle
is idle for extended periods of time, is the cause
of failure. Condensation can enter the tail pipe
or an exhaust manifold gasket leak. Typically,
this occurs from irregular or sporadic driving.
Regular on-the-road vehicle use will help burn
condensation and prevent rusting.

Lack of Maintenance –

Turbocharged engines require thorough care with stable, regularly
scheduled maintenance cycles for lubrication
systems, air filters, seals and gaskets. As
previously noted, catastrophic failure can occur
when engine oil changes become infrequent and
fail to meet recommended scheduling intervals.
Air filter maintenance is vital to eliminate
foreign object damage (FOD) to the charged air
impeller. Research shows that under normal
driving conditions, most medium-duty diesel
vehicles have an average operation life of 10
years or 100,000 kilometers on their exhaust systems.
At 100,000 kilometers, inspecting and cleaning the
intercooler system and removing any cause of
FOD is highly recommended. After excessive
miles, turbochargers comp object damagesometimes experience
pressure loss caused by worn seals (leakage)
and/or worn impeller (leakage). Seals will easily
damage under extensive pressure cycles,
especially sealing rings for rotating parts.
Foreign object damage to impeller, as well as
chipped or bent vanes on impellers, will reduce
required energy efficiency to increase
combustion pressure (power).

Turbochargers

We repair and sell all brands of turbochargers. turbo_article_turboalh17Our vast knowledge assures you of the best quality and assembly available. All our repaired turbochargers are test run and checked for oil leaks prior to delivery, guaranteeing peace of mind.

Upon Receipt of damaged turbocharger and assessment is done to establish cause of failure and advising client of possible engine damage. The turbocharger is stripped and examined for cause of failure, it is then cleaned and the components bead blasted to ensure that the components are clean and carbon free.

The parts are measured and checked for true and wear and the client is quoted on the repair or replacement of the unit should it be deemed to be uneconomical to be repaired. The client then has the option to have the turbo repaired or to take an exchange unit.