BORING OF CYLINDER
EG0FF–01
HINT:
•Bore all the six cylinders for the oversized piston outside
diameter.
•Replace the piston rings with ones to match the oversized
pistons.
1. KEEP OVERSIZED PISTONS
Oversized piston diameter:
O/S 0.50
87.945–87.975 mm (3.4624–3.4636 in.)
2. CALCULATE AMOUNT TO BORE CYLINDER
(a) Using a micrometer, measure the piston diameter at right
angles to the piston pin center line, 26 mm (1.02 in.) from the
piston head.
(b) Calculate the amount of which each cilinder is to be rebored
as follows:
Size to be rebored = P + C – H
P = Piston diameter
C = Piston oil clearance
0.13–0.15 mm (0.0051–0.0059 in.)
H = Allowance for honing
0.02 mm (0.0008 in.) or less
3. BORE AND HONE CYLINDERS TO CALCULATED
DIMENSIONS
Maximum honing:
0.02 mm (0.0008 in.)
NOTICE: Excess honing will destroy the finished round-
ness.
EG–116
–ENGINE TROUBLESHOOTING ENGINE MECHANICAL
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