Engines Iveco N45, N67. Manual — part 22
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
1
F4HE NEF ENGINES
Print P2D32N003GB
Base - February 2006
SECTION 4
Overhaul and technical specifications
Page
GENERAL SPECIFICATIONS
3
. . . . . . . . . . . . . . .
CLEARANCE DATA
4
. . . . . . . . . . . . . . . . . . . . .
4 AND 6 ENGINE OVERHAUL
11
. . . . . . . . . . . . .
ENGINE REMOVAL AT THE BENCH
11
. . . . . . . .
REPAIR OPERATIONS
12
. . . . . . . . . . . . . . . . . . . .
CYLINDER UNIT
12
. . . . . . . . . . . . . . . . . . . . . . . .
- Checks and measurements
12
. . . . . . . . . . . . . . .
- Checking head supporting surface
on cylinder unit
13
. . . . . . . . . . . . . . . . . . . . . . . .
TIMING SYSTEM
14
. . . . . . . . . . . . . . . . . . . . . . . .
- Camshaft
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Checking cam lift and pin alignment
15
. . . . . . . .
BUSHES
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Bush replacement
16
. . . . . . . . . . . . . . . . . . . . . .
- Tappets
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Fitting tappets — camshaft
17
. . . . . . . . . . . . . . . .
OUTPUT SHAFT
18
. . . . . . . . . . . . . . . . . . . . . . . .
- Measuring journals and crankpins
18
. . . . . . . . . .
- Measuring journals and crankpins (6 cyl.)
20
. . . .
- Replacing oil pump control gear
22
. . . . . . . . . . .
- Fitting main bearings
22
. . . . . . . . . . . . . . . . . . . .
- Finding journal clearance
22
. . . . . . . . . . . . . . . . .
- Checking crankshaft shoulder clearance
23
. . . . .
CONNECTING ROD — PISTON ASSEMBLY
23
. .
- Pistons
24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F4HE NEF ENGINES
Base - February 2006
Print P2D32N00GB
Page
- Measuring piston diameter
24
. . . . . . . . . . . . . . . .
- Piston pins
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Conditions for proper pin-piston coupling
25
. . . .
- Connecting rods
26
. . . . . . . . . . . . . . . . . . . . . . .
- Bushes
27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Checking connecting rods
28
. . . . . . . . . . . . . . . .
- Checking bending
28
. . . . . . . . . . . . . . . . . . . . . . .
- Checking torsion
28
. . . . . . . . . . . . . . . . . . . . . . .
- Fitting connecting rod-piston assembly
28
. . . . . .
- Connecting rod-piston coupling
28
. . . . . . . . . . . .
- Fitting split rings
29
. . . . . . . . . . . . . . . . . . . . . . . .
- Fitting connecting rod-piston assembly
into cylinder barrels
29
. . . . . . . . . . . . . . . . . . . . .
- Finding crankpin clearance
30
. . . . . . . . . . . . . . . .
- Checking piston protrusion
31
. . . . . . . . . . . . . . .
Page
CYLINDER HEAD
32
. . . . . . . . . . . . . . . . . . . . . . . .
- Removing the valves
32
. . . . . . . . . . . . . . . . . . . .
- Checking cylinder head wet seal
33
. . . . . . . . . . .
- Checking cylinder head supporting surface
33
. . .
VALVES
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Removing carbon deposits, checking and
grinding valves
34
. . . . . . . . . . . . . . . . . . . . . . . . .
- Checking clearance between valve stem and valve
guide and valve centering
34
. . . . . . . . . . . . . . . . .
VALVE GUIDE
35
. . . . . . . . . . . . . . . . . . . . . . . . . .
VALVE SEATS
35
. . . . . . . . . . . . . . . . . . . . . . . . . . .
- Regrinding — replacing the valve seats
35
. . . . . . .
CYLINDER HEAD VALVE SEATS (6 CYL.)
36
. . . .
FITTING CYLINDER HEAD
38
. . . . . . . . . . . . . . . .
- Refitting the cylinder head
39
. . . . . . . . . . . . . . . .
TIGHTENING TORQUE
40
. . . . . . . . . . . . . . . . . .
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
3
F4HE NEF ENGINES
Print P2D32N003GB
Base - February 2006
GENERAL SPECIFICATIONS
Type
4 CYLINDERS
6 CYLINDERS
Cycle
Four-stroke diesel engine
Power
Turbocharged with intercooler
Injection
Direct
Number of cylinders
4
6
∅
Bore
mm
104
Stroke
mm
132
+
+
+.. =
Total displacement
cm
3
4485
6728
TIMING
start before T.D.C.
A
end after B.D.C.
B
18.5º
29.5º
start before B.D.C.
D
end after T.D.C.
C
67º
35º
X
Checking timing
mm
X
mm
Checking operation
mm
X
mm
-
-
0.20 to 0.30
0.45 to 0.55
FUEL FEED
Injection
Type:
Bosch
high pressure common rail
EDC7 ECU
Injector
CRIU 2
Nozzle type
DSLA and DLLA
Injection sequence
1 - 3 - 4 - 2
1 - 5 - 3 - 6 - 2 - 4
bar
Injection pressure
bar
250 - 1450
250 - 1600
4
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F4HE NEF ENGINES
Base - February 2006
Print P2D32N00GB
CLEARANCE DATA
Type
4 CYLINDERS
6 CYLINDERS
CYLINDER UNIT AND CRANKSHAFT COMPONENTS
mm
∅1
X
Cylinder barrels
∅1
102.009 to 102.031
L
∅
Cylinder barrels:
outside diameter
∅ 2
length
L
-
-
Cylinder barrels — housings on
engine block (interference)
-
Outside diameter
∅ 2
0,5
∅ 3
X
Cylinder barrels:
inside diameter
∅ 2
-
∅1
X
∅ 2
Spare pistons
type:
Size
X
Outside diameter
∅ 1
Pin housing
∅ 2
61
103.730 to 103.748
38.010 to 38.016
Piston — cylinder barrels
0.252 to 0.294
Piston diameter
∅ 1
0.5
X
Piston protrusion
X
0.28 to 0.52
3
∅
Piston pin
∅ 3
37.994 to 38.000
Piston pin — pin housing
0.01 to 0.022
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