Section 01: ENGINE
PA1561
41
MAINTENANCE
Engine oil temperature should be checked
every 25,000 miles (40 000 km) to determine
oil cooler efficiency. This check should be
made by inserting a steel jacketed
thermometer in the dipstick opening,
immediately after stopping a hot, loaded
engine. If the oil temperature exceeds the
coolant temperature by more than 60
°
F (33
°
C), the oil cooler may be clogged.
For detailed oil specifications, refer to
DETROIT DIESEL SERIES 60 2007 ON-
HIGHWAY SERVICE MANUAL 6SE2007
under heading
«Lubricating Oil for Detroit
Diesel Engines»
.
2.14 RECOMMENDED ENGINE OIL TYPE
To provide maximum engine life, lubricants shall
meet the following specifications: SAE Viscosity
Grade: 15W-40 API Classification: CJ-4.
CAUTION
Low ash oil formulation designated API CJ-4
is required in EPA-07 engines.
CJ-4 contains less than 1% ash which is the
key to achieving maximum diesel particulate
filter cleaning intervals. Use of high ash
engine oils will reduce the cleaning interval on
the Diesel Particulate Filter (DPF). DPF
regenerates the combustible soot, but the ash
(a product of the oil lubricant package) slowly
accumulates in the channels of the DPF.
NOTE
Monograde oils should not be used in these
engines regardless of API Service
Classification.
NOTE
The use of supplemental oil additives is
discouraged from use in Detroit Diesel
Engines.
Synthetic oils
:
Synthetic oils may be used in
Detroit Diesel engines provided they are API-
licensed and meet the performance and
chemical requirements of non-synthetic oils
outlined previously. Synthetic oils do not permit
extension of recommended oil drain intervals.
NOTE
COLD WEATHER STARTING
The proper selection of the engine oil grade
will ease cold weather starting (refer to the
lubrication and servicing schedule for the
engine oil grade recommendation). Other
practical considerations, such as the use of
batteries, cables and connectors of adequate
size, proper setting of voltage regulator, ether
starting aid, oil and coolant heater systems,
and proper fuel selection will ease cold
weather starting.
2.15 POWER PLANT ASSEMBLY REMOVAL
To access the engine or engine-related
components, the vehicle power plant assembly
must be removed as a whole unit by means of a
slide-out cradle. The power plant assembly
includes the engine, transmission (including
retarder if so equipped), air compressor,
alternator and transmission oil cooler.
Remove the power plant assembly as follows:
CAUTION
Tag hoses and cables for identification before
disconnecting in order to facilitate
reinstallation. Plug all openings to prevent dirt
from entering the system.
NOTE
The MCM is non-serviceable. If found
defective, replace as a unit.
1. Disconnect the battery cables from the
batteries. With the electrical circuit disrupted,
accidental contact with the starter button will
not produce an engine start. In addition, the
Electronic Unit Injectors (EUI) will be
disabled, preventing any fuel delivery to the
injector tips.
WARNING
Due to the heavy load of the rear bumper
assembly, it must be adequately supported
before attempting to remove it.
2. Remove the rear bumper assembly from the
vehicle. Refer to Section 18
BODY
, under
"Rear Bumper Removal And Installation".
