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7
7.3 PRE-ASSEMBLY OF CONNECTING RODS - PISTONS
Important
• Before
pre-assembly,
difference between the two connecting rod-piston-
wrist pin assemblies does not exceed 10 g to prevent
weight imbalances.
1. Lubrificate the wrist pin (A) and the seat of the small
end of the connecting rod (B).
2. Place the lock ring (C) on the piston complete with
sealing rings (D).
Important
• Insert the lock rings with the tips pointing towards
the base of the piston with a tolerance of 15°.
3. Insert the wrist pin (A) into the piston (D) and install the
connecting rod (B) (complete with cap).
4. Insert the wrist pin completely and fasten with the lock
ring.
Important
• Make sure the lock rings are positioned correctly in
their seats.
• Lubricate the coupling parts and those that are
prone to oxidation.
7.4 INSTALLING VALVES
7.4.1 Assembling the valves
Important
• Make sure that the cylinder head is perfectly clean
and dry.
• Check that all components are intact and, if
necessary, replace them with original spares.
1. Lubrificate the valve stem sealing ring (A), insert it into
tool "717-1460-047", and mount it right into the
seat of the valve guide.
2. Lubrificate the vale stem (B).
3. Slip the valve into the seats.
66
INSTALLATION OF ASSEMBLIES
check
that
the
weight
Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
A
D
C
93
94
B
connecting rod cap
tool
717-1460-047
A
B
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