A3.2
Nectis 207 – 12.2005 – GB
General specification
103vfm00
Fig. 1
"NEF" engines are 3 or 4 cylinder diesel units with
2 valves per cylinder, and may be atmospheric or
turbo-charged. They are equipped with mechanical rotary
injection pumps.
N.B.: The data, characteristics and outputs are only
valid if the installer observes the relevant Iveco
installation recommendations. Any equipment fitted
by the installer must also always respect the torque
and power outputs and rpm figures for which the
engine was designed.
A3.8
Nectis 207 – 12.2005 – GB
Lubrication
Operation
The pressurised lubrication system uses a lobe oil pump
located at the front of the block, driven by the splined ring
attached to the crankshaft cone. Oil is pumped from the
crankcase to the crankshaft, the camshaft and the
cylinder head (oil cooler, turbocharger).
Oil system layout (3-cylinder engine)
221vfm00
Fig. 3
Nomenclature
177 Turbocharger oil return line.
178 Oil filter.
179 Oil cooler element.
180 Oil cooler.
181 Oil pump.
Oil pressure feed.
Oil gravity return route.
177
178
179
180
181
Nectis 207 – 12.2005 – GB
A3.9
Lubrication
Oil system layout (4-cylinder engine)
221vfm01
Fig. 4
Nomenclature
182 Turbocharger oil return line.
183 Oil filter.
184 Oil cooler element.
185 Oil cooler.
186 Oil pump.
Oil pressure feed.
Oil gravity return route.
182
183
184
186
185
A3.10
Nectis 207 – 12.2005 – GB
Cooling
Operation
The pressurised closed circuit engine cooling system has
the following components:
• Expansion tank.
• Radiator, to dissipate the heat extracted from the
engine by the coolant fluid.
• Visco-static cooling fan to increase the radiator's heat
dissipation capability, that also forms part of the engine's
specific build.
– An oil cooler to cool the lubricant oil
– A centrifugal-type water pump located at the front of the
engine block.
– A thermostat that controls the circulation of the coolant
fluid.
Cooling (3-cylinder engine)
251vfm05
Fig. 5
Nomenclature
A Radiator inlet.
B Radiator outlet.