Checking Cylinder Head Mating Surface; Removing Deposits, Refacing And Checking Valves - Iveco daily euro 4 Repair Manual

D E 4
AILY URO
Checking cylinder head seal
Check the hydraulic seal using a suitable tool.
Pump in water heated to approx. 90°C at a pressure of 2 ÷
3 bars.
Replace the cup plugs if they are found to leak at oil, using a
suitable drift for their removal — assembly.
NOTE Before mounting the plugs, apply LOCTITE 270
water-reacting sealant on their sealing surfaces.
If there is any leakage from the cylinder head, it must be
replaced.

Checking cylinder head mating surface

Figure 156
The mating surface of the head (1) with the cylinder block
is checked using a rule (2) and a feeler gauge (3).
The deformation found on the entire length of the cylinder
head must be no greater than 0.20 mm.
For greater values, regrind the cylinder head according to the
values and instructions given in the following figure.
The nominal thickness A of the cylinder head is 112 ±0.1 mm;
the maximum permissible removal of metal must not exceed
a thickness of 0.2 mm.
NOTE After regrinding, check the valve recessing and if
necessary regrind the valve seats to make the
prescribed valve recessing.
Print 603.93.651
540662 VALVES
Figure 157
EXHAUST
MAIN DATA OF INTAKE AND EXHAUST VALVES
Removing deposits, refacing and checking
valves
Figure 158
75451
Remove the carbon deposits on the valves with a wire brush.
Check that the valves show no signs of seizure, cracking or
burning.
Figure 159
Use micrometer (2) to measure valve (1) stem: it shall
correspond to the value shown in figure 135. Use grinding
machine 99305018 to grind, if necessary, the valve seats
(remove as less material as possible).
F1A ENGINE
INTAKE
VALVE VALVE
93
108196
18625
18882
Base - March 2006