Mazda MX-3 silhouetteMX-3

Assembly

B2-90prose procedure
Continued from B2-89

Piston rings (continued)

  1. 2
    Verify that the spacer tang separates the rails, and that the rails turn smoothly in both directions.
  2. 3
    Install the rings with the R marks upward.
    Detail diagram of a piston ring showing the 'R MARKS' on the ring and a magnified inset labeled 'SECOND' showing the second ring profile. Illustrates installing rings with R marks upward.
  3. 4
    Using a piston ring expander, install the second ring with the scraper face downward.
  4. 5
    Using a piston ring expander, install the top ring.
  5. 6
    Apply a liberal amount of clean engine oil to the piston rings.
  6. 7
    Position the end gap of each ring as shown.
    Top-view diagram of piston ring end-gap positioning. Circular layout shows TOP RING, SECOND RING, OIL RING UPPER RAIL, OIL RING LOWER RAIL and OIL RING SPACER positions, with two 30 degree angles measured relative to the PISTON PIN direction.

Oil jet

  1. 1
    Apply thread locking compound to the oil jet threads.
  2. 2
    Install the oil jets into the upper cylinder block.
    Line drawing of the cylinder block showing an oil jet being installed into the upper cylinder block, with the oil jet pointed to near the main bearing saddle area.
Oil jet
3.0 - 4.9N·m

Crankshaft

  1. 1
    Measure the main bearing oil clearances as described below.

Oil clearance inspection

  1. 1
    Remove any foreign material and oil from the journals and bearings.
  2. 2
    Install the upper main bearings (with oil groove) and the upper thrust bearings.
    No.4 bearing is wider than other bearings.
    Line drawing of a main bearing installed in the cylinder block saddle with the OIL GROOVE callout pointing to the grooved upper main bearing.
  3. 3
    Install the lower cylinder block along with the lower main bearings and thrust bearings.
  4. 4
    Measure the length of lower cylinder block bolt. Replace it if the length exceeds the maximum.
    Three cylinder block bolts labeled A, B and C drawn with their measured shank diameters and overall lengths. Bolt A: 8.05-8.15mm (0.317-0.321 in) shank, 135.7-136.3mm (5.34-5.37 in) length. Bolt B: 7.45-7.55mm (0.293-0.297 in) shank, 135.7-136.3mm length. Bolt C: 119.7-120.3mm (4.71-4.74 in) length.
Bolt A and B Length
135.7-136.3mm {5.343-5.361 in}
Bolt A and B Maximum
138.5mm {5.453 in}
Bolt C Length
119.7-120.3mm {4.713-4.736 in}
Bolt C Maximum
121.0mm {4.764 in}
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