Mazda MX-3 silhouetteMX-3

INSPECTION / REPAIR

B2-80prose procedure

Camshaft cap removal / oil clearance

  1. 10
    Loosen the camshaft cap bolts in five or six steps in the order shown.
    RH camshaft cap tightening/loosening order diagram (top view of cylinder head). Numbered circles 1-16 show the bolt sequence. 'THRUST CAP' labeled at center.
  2. 11
    Measure the oil clearance.
    Illustration of measuring camshaft journal oil clearance with Plastigage; a finger holds the Plastigage strip against the journal in the cylinder head. Labeled 'PLASTIGAGE'.
  3. 12
    If the oil clearance exceeds the maximum, replace the camshaft or the cylinder head.
Oil clearance No.1, No.5
0.040–0.081 mm {0.0016–0.0031 in}
Oil clearance No.2–No.4
0.070–0.111 mm {0.0028–0.0043 in}
Maximum No.1, No.5
0.120 mm {0.0047 in}
Maximum No.2–No.4
0.150 mm {0.0059 in}

Camshaft end play

  1. 10
    Measure the camshaft end play. If it exceeds the maximum, replace the camshaft or the cylinder head.
    Illustration of measuring camshaft end play with a dial indicator mounted on the cylinder head against the camshaft gear; arrow shows axial movement.
End play
0.05–0.10 mm {0.0020–0.0039 in}
Maximum
0.14 mm {0.0055 in}

HLA

HLA inspection

  1. 1
    With the HLA filled with engine oil, hold (A) and press (B) by hand. If (B) moves, replace the HLA—do not attempt to repair it.
    HLA (hydraulic lash adjuster) hand-check diagram. Arrow A points down at top surface, arrow B points up at bottom plunger; labeled circled A and circled B.

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