Removal
1. Remove the oil pan assembly.
2. Remove the cover.
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3. Remove the oil pick-up.
4. Remove the oil pump.
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5. Remove the oil baffle plate (engines B16A2, B16A4, B16A5, B16A6).
6. Loosen the bolts and remove the bearing cover.
Caution: To prevent deformation, loosen the bolts in sequence one bolt turn at a time in the sequence shown in the figure until all bolts are loosened.
Sequence of unscrewing the main bearing cap bolts
7. Remove the connecting rod bearing caps.
8. Carefully remove the crankshaft from the engine so as not to damage the nuts.
9. Remove the upper bearing halves from the connecting rods and set them aside with their caps.
10. Reinstall the main caps and bearings on the engine in the proper order.
11. If a ridge of metallic or hard carbon is felt around the top of each cylinder, remove it.
Caution: If the ridge is not removed, you may damage the pistons when removing them.
12. Remove the pistons using a wooden hammer handle.
13. Reinstall the connecting rod bearings and caps after removing the piston and connecting rod assembly.
14. Mark the number of each piston assembly with the connecting rod (the number of the cylinder from which they were extracted), to avoid confusion during subsequent assembly.
Please note: the number on the connecting rod does not indicate its position in the engine, but indicates the size of the connecting rod (for inserts of a certain size group).