A (mm)
4
55
54
52 53
Piston - Retting
Connect piston to connecting rod after lubricating piston pin and
introducing it by exerting pressure with your thumb.
Position the two piston pin circlips and check that they are well
inside their seats.
Using a ring compressor introduce the piston into the cylinder
with combustion chamber facing the injection pump side.
Engine type No.of notches
Resulting clea-
rance (mm)
Disassembly / Reassembly
Cylinder head gasket
Caution – Warning
Remove the head gasket from its protective wrapping only
when ready for tting.
At B the gasket shows small semi-circular notches indicating
thickness.
Choose the proper head gasket considering that for each value
of A (maximum projection of the piston from the cylinder surface)
there is a matching gasket among the three available (with no
notch, one notch or two notches) to achieve a clearance volume
between 0.66 and 0.90 mm.
IntheLDW1503/1603enginestheheadgasketismadeofbre,
while in the LDW 2004 / 2204-T / 2204 / 2204-T engines the head
gasket is metal.
Note: The notches shown above protrude
from the cylinder head plane; you can
thus determine the gasket thickness
before taking down the head.
Piston position and clearance
To obtain a clearance of 0.67÷0.90 mm measure protrusion A of
all pistons from the cylinder plane and consider the A value of
the most protruding piston.
Perform this measurement along the engine axis.
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