ENGINE AND PERIPHERALS
En
gine repair10
ASSEMBLING THE CONNECTING RODS AND
PISTONS
The pistons are marked with an arrow stamped
onto their heads indicating the
flywheel end.
The connecting rods have no particular mounting
direction, but nevertheless the
bearin
g stop lugs
should be
positioned on the same side.
Follow the instructions below when assembling
the piston and the connecting rod:
- place the bush
B13 on the support and fix the
piston (with the arrow pointing upwards) onto
the bush with the clip,
92310R
- lubricate the centring device and the gudgeon
pin with engine oil,
- push the gudgeon pin into the mounting to
check that it slides freely, and re-centre the pis-
ton if necessary,The followin
g operations must be carried out qui-
ckl
y in order to reduce the heat loss to a mini-
mum.
When the piece of solder reaches its melting poin
t
(turns into a droplet):
- wipe off the droplet of solder,
- engage the centring guide in the piston,
- fit the connecting rod into the piston,
- quickly push in the gudgeon pin until the guide
reaches the bottom of the support base.
Check that the gudgeon pin remains within the
piston diameter for any connecting rod position in
the piston.
10-40
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ENGINE AND PERIPHERALS
En
gine repair10
Immobilise the liners using tool
Mot. 588.
92062R
Shims of the following thicknesses (mm) are avai-
lable from the Parts Department:
2.80; 2.85; 2.90;
2.95.
Refit the connecting rod shells and tighten the
nuts to a torque value of
4.2 daN.m.
Check:
- the end float of the connecting rods,
- that the assembly is able to rotate properly. Fit the crankshaft and the end float shims.
Lubricate the crankpins and the main bearing
journals with engine oil.
Refit the crankshaft bearing shells.
Apply a thin layer of
RHODORSEAL 5661 on bea-
ring
N°
1 zone (K) and tighten the bolts to
2.5 daN.m , then angle tighten to
43°
± 6°.
Check the end floatof the crankshaft, which
should be between:
-
0.045 and 0.852 mmwith wear,
-
0.045 and 0.252 mmwithout wear.
92314S MOUNTING THE BEARING SHELLS
The connecting rod bearing shells are identical.
The crankshaft bearing shells are grooved on the
cylinder block side.
92315R
The upper shell of bearing
No. 5 is a special one
and is also grooved.
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