Fig. 2.333. Measurement of diameter of a skirt of the piston

Measure by a micrometer diameter of a skirt of the piston at distance of 23,2 mm (fig. 2.333).

Nominal diameter of the piston – 87,406–87,416 mm.

Measure diameters of cylinders in the direction of an engine axis. Find a difference of diameters of the piston and cylinder.

Gap between the cylinder and the piston:

standard – 0,084–0,106 mm;

maximum – 0,130 mm.

If the gap is more than maximum, replace all pistons and chisel all cylinders. If necessary replace the block of cylinders.

NOTE Pistons for a forward and back row of cylinders differ from each other. In a back row pistons with marking of "R", in forward – with marking of "L" are installed.