Note: Rebore all four cylinders to fit the oversized piston outside diameter.
Replace piston rings with ones that match the oversized pistons.
Oversized piston diameter (0.50):
- 2L Engines - 92.44-92.47 mm
- Engine 3L - 96.44-96.47 mm
1. Calculate the cylinder bore size.
a) Using a micrometer, measure the piston diameter at right angles to the pin axis at a distance of 58 mm for 2L engines and 56 mm for 3L engines from the piston bottom.
(The material is reprinted from an online resource: «www.ToyotaMAN.ru»)
b) Calculate the size to which each cylinder must be bored using the following formula:
Boring size = P+C-H,
where P is the piston diameter,
C - clearance between piston and cylinder 0.05 - 0.07 mm.
H - honing allowance 0.02 mm or less.
2. Bore and hone the cylinders to the calculated dimensions.
- Maximum honing level: 0.02 mm.
Warning: Over-honing will result in poor cylindricity.