Piston To Cylinder Bore Fitting

Fig 1: Piston Measurement

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1 - PISTON DIAMETER

2 - 14 mm (0.551 in.)

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.

Non-Turbo:

Measurement should be taken approximately 14 mm (0.551 in.) from the bottom of the skirt (2) as shown in Fig 1 .

Turbo:

Fig 2: Piston Measurement - Turbo

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1 - PISTON DIAMETER

2 - 22 mm ( 0.866 in.)

Measurement should be taken approximately 22 mm (0.866 in.) from the bottom of the skirt (2) as shown in Fig 2 .

Fig 3: Checking Cylinder Bore

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Cylinder bores should be measured halfway down the cylinder bore and transverse (measurement location B) to the engine crankshaft center line shown in Fig 3 . Refer to Engine - Specifications . Correct piston to bore clearance must be established in order to assure quiet and economical operation.