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HOMESERVICE MANUALSMAZDA20083 S TOURING, 4D HATCHBACK, 2.3 4, STANDARDREPAIR AND DIAGNOSISENGINE MECHANICALMECHANICALENGINE MECHANICAL - OVERHAUL - (LF, L3)CYLINDER BLOCK (I) ASSEMBLYMAIN BEARING CAP ASSEMBLY NOTE
2008 Mazda 3 s Touring, 4D Hatchback, 2.3 4, Standard

Main Bearing Cap Assembly Note

2008 Mazda 3 s Touring, 4D Hatchback, 2.3 4, StandardSECTION Main Bearing Cap Assembly Note
  1. Install the main bearing caps in the order indicated in the figure.
    Fig 1: Main Bearing Cap Bolt Tightening Sequence
    G02831636Courtesy of MAZDA MOTORS CORP.
  2. Tighten the main bearing cap bolts using the SST (49 D032 316). See Figure.

    Tightening Torque 

      Plastic region tightening bolt (Bolt stem length 110 mm) 

    1. (1) 44-46 N.mn {4.5-4.6 kgf.m, 32.5-33.9 ft.lbf} 
    2. (2) plus 175°-185° 

      3. Elastic region tightening bolt (Bolt stem length 104 mm) 

    3. (1) Apply engine oil to all bolts. 
    4. (2) 3-7 Nm {30.6-71.3 kgfcm, 26.6-61.9 inlbf} 
    5. (3) plus 23-27 Nm {2.4-2.7 kgfm, 17-19.9 ftlbt} 
    6. (4) plus 38-42 Nm {3.9-4.2 kgfm, 28.1-30.9 ftlbt} 
    7. (5) Loosen all the bolts. (no remaining torque.) 
    8. (6) plus 3-7 Nm {30.6-71.3 kgfcm, 26.6-61.9 inlbt} 
    9. (7) plus 18-22 Nm {1.9-2.2 kgfm, 13.3-16.2 ftlbt} 
    10. (8) plus 87.5°-92.5° 

RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.