i04103131
Turbocharger
-
Inspect
(High
Pressure
and
Low
Pressure
Turbochargers)
Illustration 88
g02307134
Typical example
Hot engine components can cause injury from
burns. Before performing maintenance on the en-
gine, allow the engine and the components to
cool.
The engine is equipped with a high-pressure
turbocharger (1) and a low-pressure turbocharger
(4). A regular visual inspection of both turbochargers
is recommended. If the turbocharger fails during
engine operation, damage to the turbocharger
compressor wheel and/or to the engine may occur.
Damage to the turbocharger compressor wheel can
cause additional damage to the pistons, the valves,
and the cylinder head.
NOTICE
Turbocharger bearing failures can cause large quan-
tities of oil to enter the air intake and exhaust sys-
tems. Loss of engine lubricant can result in serious
engine damage.
Minor leakage of oil into a turbocharger under ex-
tended low idle operation should not cause problems
as long as a turbocharger bearing failure has not
occured.
When a turbocharger bearing failure is accompanied
by a significant engine performance loss (exhaust
smoke or engine rpm up at no load), do not continue
engine operation until the turbocharger is renewed.
A visual inspection of the turbochargers can minimize
unscheduled downtime. A visual inspection of the
turbochargers can also reduce the chance for
potential damage to other engine parts. Do not
inspect the engine with the engine in operation.
Removal and Installation
Refer to the Disassembly and Assembly Manual,
“Turbocharger - Remove and Turbocharger Install”
for further information.
Inspecting
NOTICE
The compressor housing for the turbocharger must
not be removed from the turbocharger for inspection
or removed for the cleaning of the compressor.
1.
Ensure that the turbocharger is clean and free from
dirt before removing components for inspection.
2.
Remove the pipe from the high-pressure
turbocharger exhaust outlet and remove the air
intake pipe to the turbocharger. Visually inspect
the piping for the presence of oil. Clean the interior
of the pipes in order to prevent dirt from entering
during reassembly.
3.
Remove bolt (3).
4.
Remove air duct (2) and check for the presence of
engine oil.
5.
Check for any loose bolts or any missing bolts.
Check for damage to the oil supply line and the oil
drain line. Check for cracks in the housing of the
turbocharger. Ensure that the compressor wheel
can rotate freely.
6.
Check for the presence of oil. If oil is leaking from
the back side of the compressor wheel, there is a
possibility of a failed turbocharger oil seal.
126
SEBU8601-04