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Home >> Honda >> 2021 >> Pilot EX-L, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System / Engine Mechanical - Service Information >> Removal And Installation >> Piston, Ring, Pin, And Connecting Rod >> Installation
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Piston, Ring, Pin, And Connecting Rod: Installation

  1. Piston Pin - Install
    GHH308627Courtesy of HONDA, U.S.A., INC.
    		 1. Install a piston pin snap ring (A) only on one side.

    2. Coat the piston pin bore in the piston, the bore in the connecting rod, and the piston pin with new engine oil.
    GHH308628Courtesy of HONDA, U.S.A., INC.
    		 3. Heat the piston to about 158 °F (70 °C).
    GHH308629GHH308630Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    GHH308629GHH308630Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    		 4. Assemble the piston (A) and the connecting rod (B) with the embossed marks (C) on the same side. Install the piston pin (D).

    NOTE:  Apply new engine oil to the piston pin.

    5. Install the remaining snap ring.

    6. Reassemble the other pistons the same way.
  2. Piston Ring - Install
    GHH308631GHH308632Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    GHH308631GHH308632Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    		 1. Install the rings as shown. The top ring (A) has a 1A mark and the second ring (B) has a SPR mark. The manufacturing marks (C) must be facing upward.
    GHH308633Courtesy of HONDA, U.S.A., INC.
    		 2. After installing a new set of rings, measure the ring-to-groove clearance.
     
    Top Ring Clearance 
    Standard (New): 0.065-0.090 mm (0.003- 0.003 in) 
    Service Limit: 0.15 mm (0.005 in) 
     
    Second Ring Clearance 
    Standard (New): 0.030-0.055 mm (0.002- 0.002in) 
    Service Limit: 0.13 mm (0.005 in) 
    GHH308634Courtesy of HONDA, U.S.A., INC.
    		 3. Rotate the rings in their grooves to make sure they do not bind.

    4. Position the ring end gaps as shown.
  3. Connecting Rod Bearing Clearance - Inspect
  4. Piston/Connecting Rod Assembly - Install
    GHH308635Courtesy of HONDA, U.S.A., INC.
    		 1. Position the piston/connecting rod assembly with the arrow (A) facing the timing belt side of the engine block.
    GHH308636Courtesy of HONDA, U.S.A., INC.
    		 2. Position the piston/connecting rod assembly in the cylinder, and tap it in using the wooden handle of a hammer (A). Maintain downward force on the ring compressor (B) to prevent the rings from expanding before entering the cylinder bore.

    3. Stop after the ring compressor pops free, and check the connecting rod-to-rod journal alignment before pushing the piston into place.
  5. Connecting Rod Bolt - Inspect
    GHH308637Courtesy of HONDA, U.S.A., INC.
    		 1. Measure the diameter of each connecting rod bolt at point A and point B.

    2. Calculate the difference in diameter between point A and point B.


    Point A-Point B = Difference in Diameter 
     
    Difference in Diameter 
    Specification: 0-0.1 mm (0-0.004 in) 

    3. If the difference in diameter is out of tolerance, replace the connecting rod bolt.
  6. Connecting Rod Cap and Bearing Half - Install
    GHH308638Courtesy of HONDA, U.S.A., INC.
    		 1. Install the connecting rod bearing (A), then line up the mark (B) on the connecting rod (C) and the rod cap (D).

    2. Apply new engine oil to the bolt threads and flanges. Torque the bolts (E) to 20 N.m (2.0 Kgf-m, 15 lbf/ft).
    GHH308639Courtesy of HONDA, U.S.A., INC.
    		 3. Tighten the connecting rod bolt an additional 90 °.
     
    NOTE:  Remove the connecting rod bolt if you tightened it beyond the specified angle, and inspect the connecting rod bolt. Do not loosen it back to the specified angle.
  7. Baffle Plate - Install
  8. Oil Strainer - Install
  9. Oil Filter Base/Oil Filter Assembly - Install
  10. Oil Pan - Install 
  11. Cylinder Head - Install - Refer to:

    Cylinder Head Removal and Installation (9-Speed A/T) (2019 2020 2021) or

    Cylinder Head Removal and Installation

  12. Drive Plate - Install - Refer to:

    Drive Plate (9-Speed A/T) (2019 2020 2021)  or

    Drive Plate (6-Speed A/T) [(9-Speed A/T) (2016 2017 2018] .

  13. Transmission - Install - Refer to:

    Automatic Transmission Removal and Installation (9-Speed A/T)

    Automatic Transmission Removal and Installation (6-Speed A/T)

  14. Engine/Transmission - Install - Refer to:

    Engine Removal and Installation (6-Speed A/T) ('16-'18 9-Speed A/T)  or

    Engine Removal and Installation (9-Speed A/T) (2019 2020 2021) 

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