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INSPECTION AND REPAIR
4.Check:
Timing chain tensioner movement
*********************************
Checking steps:
While pressing the tensioner rod lightly
with fingers, use a thin screwdriver 1 and
wind the tensioner rod up fully clockwise.
When releasing the screwdriver by press-
ing lightly with fingers, make sure that the
tensioner rod will come out smoothly.
If not, replace the tensioner assembly.
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NB243008
CYLINDER AND PISTON
1.Eliminate:
Carbon deposits
(from the piston crown 1 and ring
grooves 2.)
2.Inspect:
Piston wall
Wear/scratches/damage → Replace.
3.Eliminate:
Score marks and lacquer deposits
(from the side of the piston)
Use a 600 ~ 800 grit wet sandpaper.
NOTE:
Sand in a crisscross pattern. Do not sand
excessively.
4.Inspect:
Cylinder wall
Wear/scratches → Rebore or replace.
5.Measure:
Piston-to-cylinder clearance
*********************************
Measurement steps:
1st steps:
Measure the cylinder bore "C" with a cyl-
inder bore gauge.
a 40 mm (1.6 in) from the cylinder top
4 - 25
ENG
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