TROUBLESHOOTING
Page 73
CYLINDER LINER
1. Check the cylinder liner for cracks, paying
special attention to the liner flange. The
standard dye penetrant or Magnaflux
®
method can be used for checking.
2. Measure the cylinder liner wear with a
cylinder bore gauge. The original bore size
of the cylinder liner can be used as a
reference measurement.
56
Figure 56 — Measuring Cylinder Liner Wear
3. Measure the cylinder liner at Top Dead
Center (TDC), at Bottom Dead Center
(BDC) and at a couple of positions in
between. At each point, measure in two
directions — engine crosswise and engine
lengthwise.
57
Figure 57 — Measurement Locations
4. If wear is greater than 0.05–0.10 mm
(0.002–0.004 inch), use a complete liner kit
(cylinder liner, piston, piston rings, piston pin
and cylinder liner seals). Also consider
engine oil consumption to determine when
to replace the cylinder liner.
Pistons and cylinder liners are available from
stock only as matched pairs and should not be
mixed.
PISTON
Inspect the piston ring grooves, lands, skirt and
combustion bowl for wear, scuff marks, deep
scratches, cracks and blow-by. Pistons are NOT
repairable. Discard worn or damaged pistons.
Do not stamp or engrave on the TOP of the
piston. Failure to heed this caution may result in
severe engine damage.
To ensure that pistons are reinstalled into the
same cylinders, the pistons must be tagged with
the corresponding cylinder number when
removed during disassembly.
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