10 1 ENGINE SYSTEMS
Engine Features
Standard Features Optional Features
Four valves per cylinder Air compressor
Dual timing sensors Power steering pump
Replaceable piston and sleeve configuration Front cover PTO acces s
Gerotor lube oil pump Engine Fuel Pressure (EFP) sensor
International® electro-hydraulic generation 2
injection syste m
Diamond Logic® engine brake
Variable Geometry Turbocharger (VGT) Diamond Logic® exhaust brake
Exhaust Gas Recirculation (EGR)
Fuel heater
Water supply housing (Freon® compressor bracket) Oil pan heater
Alternator bracket
Coolant heater assembly
Control modules
Water In Fuel (WIF) separation
Water In Fuel (WIF) sensor
Inlet Air Heater (IAH)
Standard Features
DT 466, DT 570, and HT 570 are inline six cyl
inder
engines (medium range). Engine displace
ments are
7.6 liters (466 cubic inches) for the DT 4
66 and 9.3
liters (570 cubic inches) f or the DT 5
70, and HT 570.
The firing order of the cylinders is 1
–5–3–6–2–4.
The cylinder head has four valves pe
rcylinderfor
improved air flow. Each fuel Injecto
r is centrally
located between the four valves an
ddirectsfuel
over the piston bowl for improved
performance and
reduced emissions. The overh
ead valve train includes
mechanica l roller lifters, p
ush rods, rocker arms, and
dual valves that open using a
valve bridge.
A one piece crankcase withsta
nds high-pressure
loads during diesel operati
on.
The lower end of the DT 570 and
HT 570 engines (for
ratings above 300 hp) incl
udes a crankcase ladder
designed to absorb addit
ional loads generated by
increased horsepower. S
even main bearings support
the crank shaft for DT 46
6, DT 570, and HT 570
engines. Fore and aft th
rust a re con trolle d at the rear
bearing. Four insert b
ushings support the camshaft.
The rear oil seal car
rier is part of the flywheel housing.
The open crankcase b
reather assembly uses a road
draft tube to vent c
rankcase pressure and an oil
separator that ret
urns oil to the crankcase.
The cra nk sh af t (CKP) and camshaft (CMP) s
ensors
are used by the ECM and IDM to calcula te rp
m, fuel
timing, fuel quantity, and duration of f
uel injection.
Two different types of pistons are used i
n the inline
engines:
• The DT 466 engine has one piece alumin
um alloy
pistons.
• The DT 570 and HT 570 engines have two p
iece
articulated pistons with a steel cr
own.
All pistons are mated to fracture
d ca p joint connectin g
rods. Replaceable wet cylinder
sleeves are used with
the pisto ns.
A gerotor lube oil pump, mounte d
to the front cover, is
driven directly by the cranksh
aft. All engines use an
oil cooler a nd spin-on oil filte
r.
A low-pressure fuel supply p
ump draws fuel from the
fuel tank through a fuel filte
r assembly that includes
astrainer,filter element,
primer pu mp, drain valves,
and Water In Fuel (WIF) sens
or. After filtering, fuel is
pumped to the cylinder hea
d fuel rail.
The International® elect
ro-hydraulic generation 2
injection system in clu
des a cast iron oil manifold, fuel
injectors, and a high-p
ressure oil pump.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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