Checking the block of cylinders

1. Using a ruler and a measuring gauge, check the upper part of the cylinder block for deformation, scratches, corrosion (see fig. 4.36). By applying paint, cracks can be detected.

Normal deformation: 0.05mm. Permissible deformation: 0.1 mm.



2. Make sure that the surfaces are thoroughly cleaned of gasket residues and other contaminants.

3. If the deformation is more than acceptable, the cylinder block must be replaced.

Maximum lapping: 0.2 mm. Block height (new): 243.5 mm - 4G92, 263.5 mm - 4G93.

4. Check cylinder diameters for scratches and notches (pic. 4.37). If defects are found, grind the cylinders to repair size or replace the cylinder block.



5. Using a caliper, check the diameter, ovality and taper of the cylinders. In case of excessive wear, it is recommended to grind the cylinders, and the pistons and piston rings must be replaced with new ones.

Normal inner diameter: 81.00-81.03 mm.

Hole ovality and taper: 0.01 mm.