WORKSHOP MANUAL - lombardini service

Disassembly / Reassembly
4
Rocker arm cover gasket
The rocker arm cover gasket A ensures the seal of the lubrication
circuit for the camshaft and rocker arm shaft.
Always replace it and mount it with especial care above all in zones
1 and 2 where, for greater safety, it is advisable to apply a few
drops of silicon sealant.
Tighten the rocker arm cover screws at a torque of 9 Nm.
39
Crankcase vacuum regulator valve
Components:
40 41
1 Gland Nut
2 Bushing
3 Body
4 Diaphragm
5 Cap / Cover
6 Clip / Lock
7 O-Ring
8 Washer
9 O-Ring
10 Valve
11 Spring
12 Tube
13 Hose
The vacuum relief valve is an engine safety device.
Its function is that of limiting the vacuum whenever it tends to
increase.
Without this, should the air filter be clogged, the oil contained in the
carter may be sucked back into intake manifold causing the
condition for engine runaway.
42
Valve / Rocker arm clearance
Important
Setting should be performed when the engine is cold.
Bring each cylinder piston to top dead center on the compression
stroke and set clearance A at 0,20 mm for both the intake and
exhaust valves.
For greater convenience, clearance check B is accepted. In this case
the value is 0.15 mm.
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FOCS Workshop Manual_cod. 1.5302.858_1° ed_ rev. 00
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