Clearance between piston and cylinder (Nissan Serena C24)

Inner diameter of the cylinder

Using a bore gauge, check each cylinder for wear, out-of-roundness and taper at 6 different positions along the X and Y axes at locations A, B and C (top, center and bottom).

• Standard cylinder bore: 89.000-89.030mm
• Wear limit: 0.2 mm
• Maximum ovality (difference between X and Y): 0.015 mm
• Limit taper (difference between A and C): 0.010 mm

If the measured values exceed the specified values, or if there are scoring or burnt areas on the inner cylinder walls, hone or rebore.

There are pistons with an oversize of 0.25 mm and an oversize of 0.5 mm. When using an oversize piston, hone it so that the clearance between the piston and the cylinder wall is within the standard. In addition, use oversize piston rings that match the oversize piston.



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Piston outer diameter

Using a micrometer, measure the outside diameter of the piston.

• Measuring point: 59 mm down from the piston head.

• Standard diameter: 88.940-88.970 mm

Calculation of the clearance between the piston and the cylinder wall

Make calculations based on the piston skirt outside diameter and cylinder inside diameter values (x axis, point B).

(Gap) = (Inner diameter of the cylinder) - (Outside diameter of piston skirt)

• Standard gap at 20°C: 0.050-0.070 mm

If the clearance exceeds the nominal value, replace the piston and piston pin assembly.