Navistar International DT 466 Diagnostic/Troubleshooting Manual page 14

10
Engine Features
Standard Features
Four valves per cylinder
Dual timing sensors
Replaceable piston and sleeve configuration
Gerotor lube oil pump
International® electro-hydraulic generation 2
injection system
Variable Geometry Turbocharger (VGT)
Exhaust Gas Recirculation (EGR)
Water supply housing (Freon® compressor bracket)
Alternator bracket
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 cylinder
engines (medium range). Engine displacements are
7.6 liters (466 cubic inches) for the DT 466 and 9.3
liters (570 cubic inches) for the DT 570, and HT 570.
The firing order of the cylinders is 1–5–3–6–2–4.
The cylinder head has four valves per cylinder for
improved air flow. Each fuel Injector is centrally
located between the four valves and directs fuel
over the piston bowl for improved performance and
reduced emissions. The overhead valve train includes
mechanical roller lifters, push rods, rocker arms, and
dual valves that open using a valve bridge.
A one piece crankcase withstands high-pressure
loads during diesel operation.
The lower end of the DT 570 and HT 570 engines (for
ratings above 300 hp) includes a crankcase ladder
designed to absorb additional loads generated by
increased horsepower. Seven main bearings support
the crankshaft for DT 466, DT 570, and HT 570
engines. Fore and aft thrust are controlled at the rear
bearing. Four insert bushings support the camshaft.
The rear oil seal carrier is part of the flywheel housing.
The open crankcase breather assembly uses a road
draft tube to vent crankcase pressure and an oil
separator that returns oil to the crankcase.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
1 ENGINE SYSTEMS
Optional Features
Air compressor
Power steering pump
Front cover PTO access
Engine Fuel Pressure (EFP) sensor
Diamond Logic® engine brake
Diamond Logic® exhaust brake
Fuel heater
Oil pan heater
Coolant heater assembly
The crankshaft (CKP) and camshaft (CMP) sensors
are used by the ECM and IDM to calculate rpm, fuel
timing, fuel quantity, and duration of fuel injection.
Two different types of pistons are used in the inline
engines:
• The DT 466 engine has one piece aluminum alloy
pistons.
• The DT 570 and HT 570 engines have two piece
articulated pistons with a steel crown.
All pistons are mated to fractured cap joint connecting
rods. Replaceable wet cylinder sleeves are used with
the pistons.
A gerotor lube oil pump, mounted to the front cover, is
driven directly by the crankshaft. All engines use an
oil cooler and spin-on oil filter.
A low-pressure fuel supply pump draws fuel from the
fuel tank through a fuel filter assembly that includes
a strainer, filter element, primer pump, drain valves,
and Water In Fuel (WIF) sensor. After filtering, fuel is
pumped to the cylinder head fuel rail.
The International® electro-hydraulic generation 2
injection system includes a cast iron oil manifold, fuel
injectors, and a high-pressure oil pump.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.