Engines Iveco N45, N67. Manual - part 31
50676
70334
770321
Figure 86
Figure 87
Figure 88
MAIN DATA TO CHECK INTAKE AND EXHAUST
VALVE SPRINGS
Before refitting use tool 99305047 to check spring flexibility.
Compare load and elastic deformation data with those of the
new springs shown in the following table.
FITTING CYLINDER HEAD
Lubricate the valve stems (1) and fit them into the relevant
valve guides according to the position marked at removal.
Fit the sealing rings (2 and 3) on the valve guide.
Position on the cylinder head: the spring (4), the upper cap
(3); use tool 99360268 (1) to compress the spring (4) and
lock the parts to the valve (5) by the cotters (2).
!
Sealing rings (2) for intake valves are yellow and
sealing rings (3) for exhaust valves are green.
VALVE SPRINGS
70333
Figure 89
After regrinding, check that valve (3) sinking value is the
specified one by using the base 99370415 (2) and the dial
gauge 99395603 (1).
38
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F4HE NEF ENGINES
Base - February 2006
Print P2D32N00GB
Height
Under a load of
mm
kg
H
47.75
Free
H
1
35.33
P
339.8
± 19 N
H
2
25.2
P1
741
± 39 N