Mazda MX-5 NA silhouetteMX-5 NA

INSPECTION / REPAIR

B-48prose procedure
Continued from B-47

PREPARATION

SST

1. Clean all parts, being sure to remove all gasket fragments, dirt, oil or grease, carbon, moisture residue, and other foreign materials. 2. Inspection and repairs must be performed in the order specified.

CYLINDER HEAD

Cylinder head inspection

  1. 1
    Inspect the cylinder head for damage, cracks, and leakage of water and oil. Replace the cylinder head if necessary.
  2. 2
    Measure the cylinder head distortion in the six directions shown in the figure.
    Before grinding the cylinder head, check the following and repair or replace the cylinder head as necessary. Sinking of valve seats Damage of manifold contact surface Camshaft oil clearances and end play
    Cylinder head distortion measurement — top view of the cylinder head face with an X-pattern overlay showing six measurement directions (two diagonals plus the long edges and the cross axis) for checking flatness with a straight edge and feeler gauge.
    05U0BX-120
  3. 3
    If the cylinder head distortion exceeds specification, grind the cylinder head surface. If the cylinder head height is not within specification, replace it.
    Side view of the cylinder head with a straight edge laid along the deck face, used for grinding/height measurement.
    05U0BX-121
DistortionCylinder head
0.15mm (0.006 in) max
HeightCylinder head
133.8—134.0mm (5.268—5.276 in)
GrindingCylinder head
0.20mm (0.008 in) max
Support our work!

Search Manual

Search pages, specs, and procedures