Checking the pistons (Peugeot 307)

After removing the deposits, clean the piston and connecting rod with a suitable solvent and wipe dry.

Carefully inspect each piston for cracks around the skirt and piston pin holes.

Check for wear on the piston skirt, bores in the piston head, and burn marks on the top of the piston.

Pitting on the piston indicates that coolant has entered the combustion chamber. It is necessary to determine the reason for the liquid entering the combustion chamber and eliminate it.

Determine the piston clearance in the cylinder, equal to half the difference between the diameters of the cylinder and the piston.

Inspect each connecting rod for wear, cracks and distortion.

Connecting rods usually do not require replacement unless the engine is seized.

Measure the piston diameter.

Measure the piston ring gap.

Check the clearance between the piston ring and the piston groove.

Before installing the piston into the cylinder, the piston rings must be compressed using a compression band clamp.