Contents Section: Mechanical All sections

Fitting Pistons Mazda 929 HD

  1. Measure cylinder bore at 3 places for out-of-round and taper. If out-of-round or taper exceeds .0007" (.019 mm), rebore cylinder for oversize pistons. See CYLINDER BORE DIAMETERS table.
  2. Insert piston in cylinder. Using a feeler gauge, determine piston-to-cylinder bore clearance. Clearance should be .0009-.0020" (.023-.051 mm). Maximum clearance is .006" (.15 mm). If clearance exceeds maximum specification, rebore cylinder, and install oversize piston. See PISTON DIAMETERS table.
ApplicationIn. (mm)
Standard (New)3.5433-3.5442 (90.000-90.022)
.010 (.25 mm) O/S3.5531-3.5540 (90.250-90.272)
.020 (.50 mm) 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)3.5416-3.5429 (89.958-89.990)
.010 (.25 mm) O/S3.5515-3.5527 (90.208-90.240)
.020 (.50 mm) O/S3.5613-3.5639 (90.458-90.522)
(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)