TURBO FAILURE
Turbo failure is quite often due to four main reasons:
1)
Not
allowing an engine to warm up fully
2)
Switching
off before a turbo has begun to slow down in speed
3)
Lack
of oil changes or incorrect oil used.
4)
Low
oil level
The most overlooked factor with a Turbo is that when the engine
has stopped, so has the oil pressure.
A Turbo spins at around 40,000 Revolutions Per Minute and when the
engine has stopped the Turbo continues spinning for a few minutes afterwards.
This means that the Turbo is spinning with no oil pressure and is only
lubricated by the oil within the housing and inlet hose for this period of
time. When the engine is restarted it takes a few seconds for the oil pressure
to build up and reach the bearings, this means that a turbo is quite often
running with very little lubrication.
Dirty oil can also speed up bearing wear due to contaminates
within the oil. These same contaminates can also make the oil run hotter making
the lubricants less efficient.
FORTE who are a company who produce treatments and additives of
all sorts for the motor industry, have analysed the reasons why a turbo has
failed. They found that 20% is due to a lack of lubricant, 30% is due to there
being a delay of lubrication to the turbo bearings, 13% through lubricant
contamination and a further 12% is from the fact that the lubricant is
overheating.
A lack of oil in the engine is also a very common reason and can
be a contributing factor towards the lack or delay of lubricant to the bearings
and the contaminated or overheating of lubricants being used.
This means that a massive 75% of Turbo failures will be down to driver
error in some way.
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