Mazda MX-5 NA silhouetteMX-5 NA

INSPECTION / REPAIR

B-54prose procedure
Continued from B-53

Camshaft oil clearance (continued)

  1. 8
    Measure the oil clearances.
    Cylinder head with a precision straight edge laid across the top surface and a feeler gauge being inserted to measure oil clearance / flatness. View from above showing camshaft caps and bearings.
    05U0BX-145
  2. 9
    If the oil clearance exceeds specification, replace the cylinder head.
Oil clearancestandard
0.035—0.081 mm (0.0014—0.0032 in)mm
Oil clearancemaximum
0.15 mm (0.006 in)mm

Camshaft end play

  1. 7
    Measure the camshaft end play. If the end play exceeds specification, replace the camshaft and/or the cylinder head.
    Dial indicator mounted on the cylinder head to measure camshaft end play. The indicator probe rests against the camshaft end.
    05U0BX-146
End playstandard
0.07—0.19 mm (0.0028—0.0075 in)mm
Maximummaximum
0.20 mm (0.008 in)mm

HLA

HLA inspection

  1. 1
    Inspect the HLA friction surfaces for wear or damage. Replace the HLA if necessary.
    Hand holding an HLA (Hydraulic Lash Adjuster), with thumb pressing the plunger to check movement.
    05U0BX-147
  2. 2
    Hold the bucket body and press the plunger by hand. If the plunger moves, replace the HLA.

CYLINDER BLOCK

Cylinder block inspection

  1. 1
    Inspect the cylinder block for the following. Repair or replace the cylinder block as necessary. (1) Leakage damage. (2) Cracks. (3) Scoring of wall.
  2. 2
    Measure the distortion of the top surface of the cylinder block in the six directions shown in the figure.
    Top view of cylinder block showing measurement directions for distortion: diagonals and straight lines across the deck surface forming an X pattern with horizontal and vertical lines through the cylinders.
    05U0BX-148
  3. 3
    If the distortion exceeds specification, repair by grinding or replace the cylinder block.
    Cylinder block with a precision straight edge laid across the top deck surface to check for distortion.
    05U0BX-149
Distortionmax.
0.15 mm (0.006 in)mm
Heightstandard
221.5 mm (8.720 in)mm
Grindingmax.
0.20 mm (0.008 in)mm
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