Piston And Bore Measurement

Fig 1: Identifying Piston Diameter Measurement Location

Courtesy of CHRYSLER GROUP, LLC

NOTE:

Pistons and cylinder bores should be measured at normal room temperature, 21°C (70°F).

Piston and cylinder wall must be clean and dry. Piston diameter should be measured 90 degrees to piston pin (1).

Measurement should be taken approximately 17 mm (0.669 in.) from the bottom of the skirt (2) as shown in the illustration.

Fig 2: Checking Cylinder Bore Size
Courtesy of CHRYSLER GROUP, LLC

NOTE:
Correct piston to bore clearance must be established in order to assure quiet and economical operation.
Cylinder bores should be measured halfway down the cylinder bore and transverse (measurement location B) to the engine crankshaft center line in the illustration. Refer to SPECIFICATIONS .