Cylinder block — check

1. Visually inspect for cracks and corrosion; To do this, carry out a powder test. If possible, repair defects or replace the cylinder block.

2. Check that the top is free of gasket residue and foreign material. Check the deformation of the upper surface of the cylinder block using a thin ruler and a measuring gauge (pic. 3.58).



Nominal value: 0.05 mm. Permissible value: 0.1 mm.

3. Using a bore gauge, measure the inside diameter and cylindricity of each cylinder (pic. 3.59). If at least one cylinder is excessively worn, all cylinders are bored to the same repair size and the pistons and piston rings are replaced accordingly.



Nominal cylinder diameter:

• 4G13 engine: 71.0 mm.
• 4G15 engine: 75.5 mm.
• Cylindricity: 0.01 mm or less.