Engine Block Overhaul: Removal

NOTE: 

• Where icon is shown for further information continue to the information below.
• Be careful not to damage the journals and the CKP pulse plate.

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Replace

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	Detailed information, notes, and precautions
*1	These parts have inspection items.

Courtesy of HONDA, U.S.A., INC.

	Detailed information, notes, and precautions
*1	These parts have inspection items.

1. Transmission - Remove
2. Drive Plate - Remove 
3. Oil Pan - Remove
4. Oil Strainer - Remove 
5. Oil Pump - Remove 
6. Baffle Plate - Remove
7. Engine Block End Cover - Remove
8. Drain Bolt - Remove (If needed)
9. Sealing Bolt - Remove (If needed)
10. Connecting Rod Cap and Bearing Half - Remove
11. Piston/Connecting Rod Assembly - Remove

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    1. If you can feel a ridge of metal or hard carbon around the top of each cylinder, remove it with a ridge reamer (A). Follow the reamer manufacturer's instructions. If the ridge is not removed, it may damage the piston as it is pushed out.

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    2. Remove the connecting rod caps after setting the connecting rod journal at bottom dead center (BDC) for each cylinder. Remove the piston/connecting rod assembly by pushing on the connecting rod. Take care not to damage the oil jets, the connecting rod journal, or the cylinder with the connecting rod. 3. Remove the bearing from the rod cap. Keep all caps/bearings in order. 4. Remove the upper bearing halves from the connecting rods, and set them aside with their respective caps. 5. After removing a piston/connecting rod assembly, reinstall the rod cap on the rod. NOTE:  Mark the cylinder number on the connecting rod and the connecting rod bearing cap to avoid mixing them up during reassembly. The factory markings on the connecting rods do not indicate cylinder position.

12. Piston Ring - Remove

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    1. Using a ring expander (A), remove the old piston rings (B). 2. Clean all the ring grooves thoroughly with a squared-off broken ring, or a ring groove cleaner with a blade to fit the piston grooves. File down the blade, if necessary. The top ring and second ring grooves are 1.2 mm (0.047 in) wide, and the oil ring groove is 2.0 mm (0.079 in) wide. Do not use a wire brush to clean the ring grooves, or cut the ring grooves deeper with the cleaning tool. NOTE:  If the piston is to be separated from the connecting rod, do not install new rings yet.

13. Piston Pin - Remove

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    1. Apply new engine oil to the piston pin snap rings (A) and turn them in the ring grooves until the end gaps are lined up with the cutouts in the piston pin bores (B). NOTE:  Take care not to damage the ring grooves.

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    2. Remove the snap rings (A) from both sides of each piston. Start at the cutout in the piston pin bore. Remove the snap rings carefully so they do not go flying or get lost. Wear eye protection.

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    3. Separately heat each piston and connecting rod assembly to about 158°F (70°C), then remove the piston pin.

14. Main Bearing Cap and Bearing Half - Remove
    Fig 1: Main Bearing Cap and Bearing Half Bolts Loosening Sequence

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    1. Loosen the bearing cap bolts and the bearing cap side bolts in sequence 1/3 turn at a time; repeat the sequence until all bolts are loosened.

15. Crankshaft - Remove
16. Thrust Washer - Remove

    NOTE:  After the thrust washers removal, reinstall the main bearing caps and bearings on the engine block in the proper order.

17. CKP Pulse Plate - Remove