Note:
- Rebore all cylinders to the same oversize (for oversized pistons).
- Install piston rings also of the same repair size corresponding to the repair size of the pistons.
1. Select oversize pistons.
Repair (0,50) piston diameter:
- 2C - 86.445-86.475 mm
- 2S-T - 86.378-86.408 mm
- 3S-FE - 86.365-86.395 mm
- 4A-FE - 81.405-81.435 mm
- 4S-FE - 82.937-82.967 mm
2. Calculate the repair size for boring cylinders.
- A) Using a micrometer, measure the piston diameter at a right angle to the axis of the piston pin at a height of 26.0 mm (3S-FE, 4S-FE); 24.5mm (4A-FE, 7A-FE): 65.0 mm (2S, 2S-T) from the plane of the piston crown.
- b) Calculate the cylinder bore diameter.
The size to which the cylinder needs to be bored \u003d P + C-H
- Р — piston diameter, mm
- C - piston oil clearance
- 2C - 0.045-0.065 mm
- 2S-T - 0.112-0.132 mm
- 3S-FE - 0.125-0.145 mm
- 4S-FE - 0.053-0.073 mm
- H - honing allowance - 0.02 mm or less
3. Rebore and honing the cylinder to the required dimensions.
- Maximum honing tolerance - 0.02 mm