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7
7.6 INSTALLATION OF CYLINDER HEAD AND COMPONENTS
7.6.1 Assembling the precombustion chamber
Important
• Check that the contact surfaces are perfectly clean
and intact.
1. Install the precombustion chamber (A), so that its hole
(H) coincides with the one on the pre-heating glow
plug.
2. Insert tool "7107-1460-031" into the seat of the
preheating glow plug in order to lock the chamber
while the ring nut (B) is being tightened.
3. Apply some anti-seize product to the ring nut thread
(B) and to the surface that is in contact with the
precombustion chamber.
4. Mount the ring nut (B).
5. Tighten the ring nut to a temporary torque of 100Nm.
6. Make sure that the precombustion chamber protrusion
(C) is between 3.56÷4,04 mm. If the protrusion (C)
exceeds the recommended value, insert a shim (D)
(provied ad spare part) beneath the precombustion
chamber (A).
7. Tighten the ring nut to a final torque of 180Nm.
8. Remove the tool and install the preheating glow plug (E).
9. Tighten the glow plug to a torque of 20 Nm.
10. Repeat the same operations on the other chamber.
11. Connect the glow plug power supply cable (F).
72
INSTALLATION OF ASSEMBLIES
Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
A
H
110
B
111
112
tool 7170-1460-031
C
D
E
F
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