Section 02 ENGINE
Subsection 11 (CYLINDER BLOCK)
NOTE:
Make sure the cylinder bore gauge indica-
tor is set exactly at the same position as with the
micrometer, otherwise the reading will be false.
Position the dial bore gauge 62 mm (2.44 in) above
cylinder base, measuring perpendicularly (90°) to
piston pin axis.
Read the measurement on the cylinder bore
gauge. The result is the exact piston/cylinder wall
clearance.
PISTON/CYLINDER CLEARANCE
NEW NOMINAL
0.044 mm - 0.076 mm
(.0017 in - .003 in)
SERVICE LIMIT
0.090 mm (.004 in)
If clearance exceeds specified tolerance, re-hone
cylinder sleeve and replace piston by an oversize
one.
NOTE:
It is not necessary to have all pistons
replaced with an oversize if they are not all out of
specification. Mixed standard size and oversize
piston are allowed.
Piston and Connecting Rod Assembly
For installation, reverse the removal procedure.
Pay attention to the following details.
Apply engine oil on the piston pin.
Insert piston pin into piston and connecting rod.
Use the
PISTON CIRCLIP INSTALLER (P/N 529 035
765)
to assemble the piston circlip.
529035765
NOTICE
Secure piston pin with new piston
circlips.
NOTE:
Take care that the hook of the piston circlip
is positioned properly.
1
R1503motr28A
2
1. Sleeve with piston circlip inside
2. Assembly jig from piston clip installer
R610motr134B
CORRECT POSITION OF THE PISTON CIRCLIP
Piston and Connecting Rod Installation
1. Using a piston ring compressor such as the
SNAP-ON PISTON RING COMPRESSOR PLIERS
(P/N RC980)
, slide piston into cylinder.
R1503motr29A
NOTICE
Install piston with punched arrow to-
ward exhaust side.
smr2009-026
157
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