Moxy MT 26 - High Oil Consumption

SHOP MANUAL MT26-31 - 06.2005
Engine
Tier-3 710655-
Ch 1 page 158
High oil consumption
Effect Cause Troubleshooting Action
Blue smoke under load
Cylinder seizure
Liner wear
Carbon polishing
(in patches)
Piston ring wear
Piston rings stuck
Tapered piston rings
fitted wrong way
Broken piston rings
Worn valve guides
Oil level too high?
Defective shaft seals in
turbocharger
Clogged air filter
Combustion tempera-
ture too high?
Unclean intake air?
Poor grade of oil?
Individual piston rings broken = incorrectly fitted
Several upper rings broken = start spray used
wrongly, wrong injection timing (too early)
Several intermediate rings broken = worn rings or
grooves
Check the clearance
between valve and
guide.
High exhaust tempera-
ture?
Poor grade of oil?
Check whether oil is
present in the compres-
sor or intake manifold
Measure the vacuum
(max. 500 mm wc)
Check the air filter
Excessive vacuum in
the air intake before
the turbocharger
Oil viscosity too low
Deformed/incorrectly
directed piston cooling
nozzles
Piston ring seizure