Piston To Cylinder Bore Fitting

WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Piston Pin

Courtesy of CHRYSLER 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 16 mm (0.629 in.) from the bottom of the skirt (2) as shown in illustration.

Fig 2: Checking Cylinder Bore Size
Courtesy of CHRYSLER 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 shown in illustration. See Engine - Specifications .