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Home › Mazda › 2018 › 6 Signature › Repair and Diagnosis › External Pages › Different variant/trim › Section 12 (Engine Mechanical System (VIN M)) › Engine Removal/Installation › Engine Installation

Engine Installation

WARNING: This page is about a different variant/trim than selected.
WARNING:
  • When removing/installing the engine, verify that the engine and transaxle are securely supported. Otherwise, the engine may fall off and cause serious injury or death, and damage to the vehicle.
CAUTION:
  • Slots have been adopted for the No. 3 engine mount and No. 4 engine mount bracket installation holes. Tighten the installation bolts and nuts so that they are centered on the slots. Otherwise, engine noise or vibration could increase.
NOTE:
  • Retighten the engine front cover and transaxle stud bolts when the nuts of No. 3 engine mount and No. 4 engine mount bracket are loosened.
  1. Tighten the engine front cover stud bolts.
    Fig 1: Engine Front Cover Stud Bolts
    G12188574Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    7-13 N.m {72-132 kgf.cm, 62-115 in.lbf}

  2. Tighten the transaxle stud bolts.
    Fig 2: Transaxle Stud Bolts
    G12228366Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    15-25 N.m {1.6-2.5 kgf.m, 12-18 ft.lbf}

    CAUTION:
    • When supporting the engine and transaxle, insert rubber of appropriate size (approx. 20 mm {0.79 in} thickness) between the engine lifter and the oil pan, transaxle to prevent the deformation of the oil pan and damage of the transaxle.
  3. Secure the engine and transaxle using a commercially available engine lifter.
    Fig 3: Securing Engine And Transaxle Using Engine Lifter
    G11429838Courtesy of MAZDA MOTORS CORP.
  4. Return the engine and transaxle to their original positions.
  5. Temporarily tighten the No. 3 engine mount installation bolts and nuts using the following procedure:
    1. Temporarily tighten the bolts so that the bolt holes of the body are centered on the No. 3 engine mount slots.
      Fig 4: Centering Bolt Holes Of Body On Engine Mount Slots (Good)
      G11429843Courtesy of MAZDA MOTORS CORP.
    2. Temporarily tighten the nuts so that the stud bolts of the engine front cover are centered on the No. 3 engine mount slots.
      • If the stud bolts are deviated from the center of the slots, align the stud bolts with the center of the slots while slightly moving the engine, and temporarily tighten the installation nuts.
    Fig 5: Centering Stud Bolts Of Engine Front Cover On Engine Mount Slots
    G11429844Courtesy of MAZDA MOTORS CORP.
  6. Temporarily tighten the No. 4 engine mount bracket installation bolt procedure:
    1. Temporarily tighten the bolt shown in the figure below.
      Fig 6: Locating No. 4 Engine Mount Bracket Installation Bolt
      G12228370Courtesy of MAZDA MOTORS CORP.
    2. Temporarily tighten the nuts so that the stud bolts of the transaxle are centered on the No. 4 engine mount bracket slots.
      • If the stud bolts are deviated from the center of the slots, align the stud bolts with the center of the slots while slightly moving the transaxle, and temporarily tighten the installation nuts.
    Fig 7: Centering Stud Bolts Of Transaxle On Engine Mount Bracket Slots (ATX)
    G11429848Courtesy of MAZDA MOTORS CORP.
  7. Install the No. 1 engine mount rubber and the front crossmember component as a single unit. (See FRONT CROSSMEMBER REMOVAL/INSTALLATION .)
    NOTE:
    • At this stage, only temporarily tighten the No. 1 engine mount rubber, do not tighten it completely.
  8. Tighten the No. 3 engine mount installation bolts and nuts in the order shown in the figure below.
    Fig 8: No. 3 Engine Mount Installation Bolts And Nuts Tightening Sequence
    G12188581Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    Installation Position Tightening Torque
    1 76-95 N.m {7.8-9.6 kgf.m, 57-70 ft.lbf}
    2 82-95 N.m {8.4-9.6 kgf.m, 61-70 ft.lbf}
    3 49-65 N.m {5.0-6.6 kgf.m, 61-70 ft.lbf}
  9. Tighten the No. 4 engine mount bracket installation bolt and nuts in the order shown in the figure below.
    Fig 9: Engine Mount Bracket Installation Bolt And Nuts Tightening Sequence (ATX)
    G11429851Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    Installation Position Tightening Torque
    1, 2, 3, 92-116 N.m {9.4-11 kgf.m, 68-85 ft.lbf}
    4 81-99 N.m {8.3-10 kgf.m, 60-73 ft.lbf}
  10. Tighten the No. 1 engine mount rubber installation bolts
    Fig 10: Engine Mount Rubber Installation Bolts Tightening Sequence (2WD)
    G11429852Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    Installation Position Tightening Torque
    1 141-172 N.m {15--17 kgf.m, 104--126 ft.lbf}
    2 130-164 N.m {14-16 kgf.m, 96-120 ft.lbf}
  11. Connect the ground cable shown in the figure below.

    RH 

    Fig 11: No. 3 Engine Mount, Ground Cable, Bolt And Clips (RH)
    G12188569Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    8-11 N.m {82-112 kgf.cm, 71-97 in.lbf}

    LH 

    Fig 12: Engine Mount Bracket, Bolt, Ground Cable (LH)
    G11429836Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    9-12 N.m {92-122 kgf.cm, 80-106 in.lbf}

  12. Install the A/C compressor. (See A/C COMPRESSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
  13. Install the front drive shaft. (See FRONT DRIVE SHAFT REMOVAL/INSTALLATION .)
  14. Install the TWC. (See EXHAUST SYSTEM REMOVAL/INSTALLATION .)
  15. Install the generator drive belt. (See DRIVE BELT REMOVAL/INSTALLATION .)
  16. Connect the lower radiator hose to the radiator.
  17. Install the front wheels and tires. (See WHEEL AND TIRE REMOVAL/INSTALLATION .)
  18. Install the bracket shown in the figure below to the throttle body.
    Fig 13: Upper Radiator Hose, Bracket, Throttle Body And Bolt With Torque Specification
    G12188585Courtesy of MAZDA MOTORS CORP.
  19. Connect the upper radiator hose to the coolant control valve.
  20. Connect the heater hoses. (See A/C UNIT REMOVAL/INSTALLATION .)
  21. Connect the evaporative hose No. 3. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION .)
  22. Connect the fuel hose. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
  23. Connect the vacuum hose. (See VACUUM HOSE REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
  24. Connect the selector cable. (See AUTOMATIC TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION .)
  25. Install the battery tray and battery. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)] .)
  26. Connect the wiring harness shown in the figure below.
    Fig 14: Connecting Wiring Harness
    G12228378Courtesy of MAZDA MOTORS CORP.
  27. Install the PCM component. (See PCM REMOVAL/INSTALLATION .)
  28. Install the air cleaner, air hose and fresh air duct as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
  29. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  30. Refill the ATF. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT .)
  31. Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT .)
  32. Start the engine, and inspect and adjust the following:
    • Front wheel alignment (See FRONT WHEEL ALIGNMENT .)
    • Leakage of engine oil, engine coolant, ATF and fuel.
    • Runout and contact of pulley and belt.
    • Ignition timing, idle speed and idle mixture. (See ENGINE TUNE-UP .)
    • Engine-driven accessories operation.
    NOTE:
    • If the engine is overhauled and assembled to the vehicle, perform a road test to verify that there is no abnormal vibration and noise.
  33. Install the front splash shield. (See SPLASH SHIELD REMOVAL/INSTALLATION .)
  34. Install the front under cover No. 1 and No. 2. (See FRONT UNDER COVER No. 1 REMOVAL/INSTALLATION .) (See FRONT UNDER COVER No. 2 REMOVAL/INSTALLATION .)
  35. Install the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
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