Boring Of Cylinder; Keep Oversized Pistons; Calculate Amount To Bore Cylinder; Bore And Hone Cylinders To Calculated Dimensions - Toyota 3VZ–FE Troubleshooting Manual

EG–116
ENGINE TROUBLESHOOTING

BORING OF CYLINDER

1.
2.
(a) Using a micrometer, measure the piston diameter at right
(b) Calculate the amount of which each cilinder is to be rebored
3.
– ENGINE MECHANICAL
HINT:
Bore all the six cylinders for the oversized piston outside
diameter.
Replace the piston rings with ones to match the oversized
pistons.

KEEP OVERSIZED PISTONS

Oversized piston diameter:
O/S 0.50
87.945–87.975 mm (3.4624–3.4636 in.)

CALCULATE AMOUNT TO BORE CYLINDER

angles to the piston pin center line, 26 mm (1.02 in.) from the
piston head.
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
BORE AND HONE CYLINDERS TO CALCULATED
DIMENSIONS
Maximum honing:
0.02 mm (0.0008 in.)
NOTICE: Excess honing will destroy the finished round-
ness.
EG0FF–01