SHOP MANUAL MT26-31 - 06.2005
Engine
Tier-3 710655-
Ch 1 page 146
Troubleshooting tables
White smoke, water vapour
White smoke
The white smoke starts
to turn blue and disap-
pears when the engine
is warmed up
Cold engineIncompletely burnt fuel
Injection timing too late
If possible: reduce en-
gine speed or put the
engine under load
Install a white smoke
limiting device (exhaust
brake)
Install flame heater
Install an engine heater
Inlet valve does not
open properly. Valve
adjustment disturbed.
Broken delivery valve
spring, uncontrolled
injection
Disconnect one delivery pipe at a time and listen for
changes in the engine sound.
WARNING!
Be careful when disconnecting the delivery
pipes as the pressure is extremely high and
could cause injury
Too much fuel in rela-
tion to air at low com-
bustion temperatures.
Leaky injector, dripping
Effect Cause Troubleshooting Action
Water in the combustion
chamber
Leaky charge air cooler
Cracked cylinder head
(not cracks between valve
seats)
Leaky cylinder head
gasket
Crack in cylinder liner
Test pressure (air 0.5 bar,
liquid 4 bar)
The fault is also present
when the engine is hot
If the fault is hard to trace:
Change all cylinder heads for exchange cylinder heads.
(Or test pressurizing all cylinder heads. Heat the cylin-
der heads before pressurizing them.)
Effect Cause Troubleshooting Action
To Next Page
Loading...