Engine
SHOP MANUAL
Ch 1 page 157
Componenet Cause Affects
Air filter Blocked filter
The vacuum in the engine
increases, but this does not
result in increased crankcase
gases.
Turbocharger, exhaust brake
Internal exhaust leakage in
turbocharger.
Increased flow of crankcase
gases, which also leads to
increased amounts of oil
carryover, particularly during
exhaust braking.
Charge air cooler Blocked charge air cooler.
Can be caused by too high
a level of oil carryover or a
frozen charge air cooler.
Cylinder liners/piston rings
Leakage between liners and
pistons.
Increased flow of crankcase
gases.
Rocker arm shaft/cylinder
head
Worn valve guides, worn
rocker arm shafts.
Increased flow of crankcase
gases, particularly during
exhaust braking.
Can also result in increased
amounts of oil carryover.
Oil sump Oil level too high.
Increased amounts of oil car-
ryover.
Oil dipstick
Defective oil dipstick
Can result in too high an oil
level in the engine.
Air leakage at oil dipstick/oil
filler.
Flow of crankcase gases
through the engine is in-
creased if the air filter is
blocked.
Oil mist separator
Defective centrifuge
Can result in increased
vacuum in the engine if the
air filter is blocked.
Blocked return pipe for oil
separated from the crank-
case gases.
Increased amounts of oil car-
ryover.
Broken O-ring.
Increased amounts of oil car-
ryover.
Air compressor
Worn seals
Increased flow of crancase
gases through the engine
and the oil mist seperator.
Blocked outlet valves.
Increased flow of crankcase
gases.
Cylinder head Cracks
High crankcase pressure,
increased flow of crankcase
gases.
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