Dodge ram truck 3500 1996 Service Manual page 1154

9 - 164 5.9L (DIESEL) ENGINE
DESCRIPTION AND O P E R A T I O N
ENGINE DESCRIPTION
The 5.9 Liter (359 CID) six-cylinder diesel engine
is an In-line valve in head type (Fig. 1).
Fig. 1 Diesei Engine Description
This engine is designed for No.2 Diesel Fuel. Only
use No.l Diesel Fuel where extended arctic condi­
tions exist (below
-23°C
or
-10°F).
Engine lubrication system consists of a gerotor
type oil pump and a full flow oil filter with a bypass
valve.
The cylinders are numbered from front to rear; 1 to
6. The firing order is 1-5-3-6-2-4 (Fig. 2).
0
0
0 © 0 0 :
.1....: , J
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Fig. 2 Firing Order
The engine data plate is located on the driver side
of the engine forward of the fuel injection pump.
LUBRICATION SYSTEM
The engine uses a gerotor type lubricating pump.
The machined cavity in the block is the same for all
engines. The pressure regulating valve is designed to
keep the lubricating oil pressure from exceeding
4 4 9 k P a (65
PSI). When the lubricating oil pressure
from the pump is greater the
4 9 9 k P a (65
PSI), The
valve opens uncovering the dump port so part of the
lubricating oil is routed to the oil pan. Because of
manufacturing tolerances of the components and the
oil passages, the lubricating oil pressure can differ as
much as 69 kPa (10 PSI) between engines.
The engines use full flow, plate type oil coolers. The
oil flows through a cast passage in the cooler cover and
through the element where it is cooled by the engine
coolant flowing past the plates of the elements. After
the oil is cooled, it flows through the full flow oil filter.
The lubricating oil cooler cover contains a bypass
valve the will let the lubricating oil flow bypass a
plugged filter. The valve is designed to open when
the pressure drop across the filter is more than 138
kPa (20 PSI), as with a plugged filter and lets the
lubricating oil continue on through the engine. When
a filter becomes plugged, an oil pressure decrease of
60 kPa (10 PSI) or less from normal operating pres­
sure can be observed on the vehicle lubricating oil
pressure gauge. This allows unfiltered oil into the
engine. This condition should be avoided by changing
the filter at each oil change.
The turbocharger receives filtered, cooled and pressur­
ized lubricating oil through a supply line from the filter
head. A drain line connected to the bottom of the turbo­
charger housing returns the lubricating oil to the lubri­
cating oil pan through a fitting in the cylinder block.
The main bearings and the valve train are lubri­
cated by pressurized oil directly from the main oil
gallery, the other power components, connecting rods,
pistons, and camshaft receive pressurized oil directly
from the main oil gallery. Passages in the crankshaft
supply oil to the connecting rods bearings. The oil is
supplied to the camshaft journals through passages
in the main bearings saddles. Smaller passages in
the main bearings saddles supply oil to the pistons
cooling nozzles. The spray from the nozzles also pro­
vides lubrication for the piston pins.
Lubrication for the valve train is supplied through
separate passages in the cylinder block. Oil flows
through the passages and across the oil transfer slot
in the cylinder head gasket. From the transfer slot,
the oil flows around the outside diameter at the cyl­
inder capscrew, across a slot in the bottom of the
rocker lever support, and up the vertical passage in
the support. From these passages, oil flows through
passages in the rocker lever shaft to lubricate the
rocker levers. The oil from the channel lubricates the
valves stems, push rods, and tappets.
Engine Type. In-line 6 (Diesel-Turbo)
Bore and Stroke 102.0 x 120.0 mm (4.02 x 4.72 in.)
Displacement 5.9L (359 cu. in.)
Compression Ratio 17.5:1
Torque (Automatic) ..542 N«m (400 ft. lbs.) @ 1600 rpm
(Manual) 569 N®m (420 ft. lbs.) @ 1600 rpm
Firing Order 1 -5-3-6-2-4
Lubrication Pressure Feed - Full Flow
Filtration w/Bypass Valve
Engine Oil Capacity 9.5L (10.0 Qts) w/Filter
Cooling System Liquid Cooled - Forced Circulation
Cooling Capacity 23L (24 Qts)
Cylinder Block Cast Iron
Crankshaft Induction Hardened Forged Steel
Cylinder Head Cast Iron
Combustion Chambers High Swirl Bowl
Camshaft Chilled Ductile Iron
Pistons ..Cast Aluminum
Connecting Rods. Forged Steel
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