Piston To Cylinder Bore Clearance

Piston Skirt Diameter 

• Measure the piston skirt diameter.

  Courtesy of NISSAN NORTH AMERICA, INC.

  NOTE: To be sure of accuracy, the following measurements must be completed with the components at room temperature [20°C (68°F)].

  Standard

  : Refer to CYLINDER BLOCK .

  (1)	: Piston
  (A)	: Suitable tool
  (B)	: 16 mm (0.630 in)

Cylinder Bore Diameter 

• Use a suitable tool to measure the cylinder bore for wear, out-of-round and taper at six different points on each cylinder. [(A) and (B) directions at (C) and (D)] [(A) is in longitudinal direction of engine]

  Courtesy of NISSAN NORTH AMERICA, INC.

  CAUTION: If the cylinder bores are out of specification, the cylinder block must be replaced.

  Standard and Limit

  : Refer to CYLINDER BLOCK .

  (E)	: Piston TDC
  (F)	: Piston BDC

• Inspect the cylinder bores for damage or excessive wear, such as scuffing.

Piston to Cylinder Bore Clearance 

• Calculate by using diameter of the piston skirt and the cylinder bore diameter (direction B, position D).

  Courtesy of NISSAN NORTH AMERICA, INC.

  (Clearance) = (Cylinder bore diameter) - (piston skirt diameter)

  Standard

  : Refer to CYLINDER BLOCK .

  (A)	: Bore dimension (longitudinal direction if engine)
  (C)	: Bore dimension
  (E)	:Piston TDC
  (F)	: Piston BDC