Page 5 of 55
Downloaded from www.Manualslib.com manuals search engine 3
N62 Engine
Technical Data
E En
ng
gi
in
ne
e
N N6
62
2B
B4
44
4
Design 8 Cylinder V
V Angle 90°
Displacement (cm3) 4,398
Bore/Stroke (mm) 92/82.7
Cylinder Gap (mm) 98
Main Crankshaft Bearing Diameter (mm) 70
Output (kW)
at speed (rpm) 325
6,100
Torque (Nm)
at Speed (RPM) 330
3,600
Cut-off speed (RPM) 6.500
Compression Ratio 10.0
Valves / Cylinders 4
Intake Valve Diameter (mm) 35
Exhaust Valve Diameter (mm) 29
Intake Valve Lift (mm) 0.3 – 9.85
Exhaust Valve Lift (mm) 9.7
Cams Open Period (º crankshaft) 282/254
Engine Weight (kg) 213
Fuel 91 Octane
Firing Order 1-5-4-8-6-3-7-2
Knock Sensor Yes
Variable Intake Manifold Yes
Digital Motor Electronics ME 9.2 with Valvetronic Control Unit
Complies with Exhaust Emission Regulations EU-3
EU-4
LEV
Engine Length (mm) 704
Fuel Consumption Saving Compared with the M62 14%
Page 24 of 55
Downloaded from www.Manualslib.com manuals search engine Cylinder Head Gaskets
The cylinder head gasket is a multi-layer steel
gasket with a rubber coating. This type of gas-
ket has previously been used on other engines.
The B44 head gasket has a 6 mm hole in a flap
on the outlet side of the cylinder head gasket.
The cylinder head bolts for the N62 engine are
M10x160 necked-down “stretch” bolts.
N No
ot
te
e:
:
T
Th
he
es
se
e
b
bo
ol
lt
ts
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d
w wh
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d.
.
The lower part of the timing chain housing is
bolted to the cylinder head using two M8x45
bolts.
Camshafts
The camshafts are made from chilled cast iron
and are hollowed to reduce weight. The cam-
shafts are weighted with counterbalances for
equalizing imbalances in the valve gear.
1. Camshaft sensor wheels (sintered metal)
2. Thrust bearing area with oil ducts for the
VANOS units
N No
ot
te
es
s:
:
22
N62 Engine
42-02-23
42-02-22
42-02-24
Page 48 of 55
Downloaded from www.Manualslib.com manuals search engine 46
N62 Engine
Crankshaft
The N62 uses an inductively hardened cast-iron crankshaft. The crankshaft has five main
bearings (familiar 4 bolt cast iron caps) and is hollowed around bearing journals 2, 3, and
4 for weight reduction. The fifth bearing is also the “thrust” bearing.
The crankshaft stroke for the B44
is 82.7 mm.
Crankshaft Thrust Bearing
The thrust bearing halves are multiple pieces that are assem-
bled as one part for the the number five main bearing at the
rear of the engine. The bearing thickness conforms to the
familiar triple classification system (yellow - green - white).
Piston and Connecting Rod
The reduced weight cast piston contains integrated
valve reliefs in the piston crown. The pistons are made
from high-temperature aluminum alloy equipped with
three piston rings.
• First piston ring groove = square ring
• Second piston ring groove = taperface ring
• Third piston ring groove = three-part oil control ring
The forged steel connecting rod and cap is separated
by the familiar “cracked” process. The connecting rod
(large end) is angled at 30º allowing sufficient articula-
tion in a very compact space. The pistons are cooled
by oil jets spraying under the exhaust side of the pis-
ton crown.
Crankshaft
1. Crankshaft Sprocket
2-4. Hollowed Area (Weight Reduction)
42-02-68
42-02-70
42-03-70
Page 49 of 55
Downloaded from www.Manualslib.com manuals search engine 47
N62 Engine
Flywheel
The lightweight flywheel is made from a laminated plate. The
starter ring gear is also the increment wheel for engine speed
and crankshaft positioning/misfire detection.
The ring gear is riveted directly to the flexplate (6). The fly-
wheel diameter is 320 mm.
Vibration Damper
The vibration damper is a torsional vibration absorber (axial
design). The outer edge of the damper has a notch (1) to
accept the locating tool when positioning the crankshaft for
initial setting.
The locating tool inserts into the raised mount in the front
cover (2). R Re
ef
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er
r
t
to
o
t
th
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e
R
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Engine Mounting
The engine is secured by two hydraulic damping mounts that are located on the front axle
carrier (structure and function are the same as the E38/M62).
N No
ot
te
es
s:
:
12
