Valve Seats; Recutting And Replacing Valve Seats - Iveco daily euro 4 Repair Manual

D E 4
AILY URO
540661

VALVE SEATS

Recutting and replacing valve seats

Figure 165
Check the valve seats. On finding any slight scoring or burns,
regrind them with an appropriate tool according to the
angles given in Figure 165.
Having to replace them, with the same tool and taking care
not to affect the cylinder head, remove as much material
from the valve seats as possible until, with a punch, it is
possible to extract them from the cylinder head.
Heat the cylinder head to 80 ÷ 100°C and, using a suitable
drift, fit in it the new valve seats, previously chilled in liquid
nitrogen.
Using a specific tool, regrind the valve seats according to the
angles given in Figure 165.
Figure 166
Using the milling cutter 99394038 (1), clean the injector seat
of any deposits.
Print 603.93.651
Mount the valves, block the seat of the electro-injectors and
glow plugs; using a suitable tool, check the seal of the
valves/seats.
Figure 167
Using a dial gauge (1), check that, from the plane of the
cylinder head, the valve recessing (2) and the protrusion of
the injector (3) and of the glow plug have the prescribed
value:
Valve recessing: 0.5 ÷ 0.8 mm.
-
75459
Injector protrusion: 2.77 ÷ 3.23 mm.
-
- Glow plug protrusion: 3.78 mm.
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F1A ENGINE
108198
54760
Base - March 2006