Contents Section: Mechanical All sections

Fitting Pistons Mazda 929 HC

  1. Measure cylinder bore at 3 places for out-of-round and taper. If either out-of-round or taper exceeds .0007" (.019 mm), rebore cylinder for oversize pistons.
  2. Insert piston in cylinder. Using a feeler gauge, determine piston-to-cylinder bore clearance. Clearance should be .0019-.0026" (.049-.065 mm). Maximum clearance is .0059" (.15 mm). If clearance exceeds maximum, rebore cylinder and install oversize piston.
ApplicationIn. (mm)
Standard (New)3.5433-3.5442 (90.000-90.022)
.010 (.25) O/S3.5531-3.5540 (90.250-90.272)
.020 (.50) O/S3.5630-3.5639 (90.500-90.522)
(1) Cylinder bore taper and out-of-round must not exceed .0007 (.019 mm).
(1)Cylinder bore taper and out-of-round must not exceed .0007 (.019 mm).

CYLINDER BORE DIAMETERS (1)

ApplicationIn. (mm)
Standard (New)3.5411-3.5419 (89.944-89.964)
.010 (.25) O/S3.5509-3.5517 (90.194-90.214)
.020 (.50) O/S3.5608-3.5616 (90.444-90.464)
(1) Measured at .87" (22 mm) from bottom of oil ring land.
(1)Measured at .87" (22 mm) from bottom of oil ring land.

PISTON DIAMETERS (1)