Note. Before proceeding with the removal of the connecting rod and piston assemblies from the engine, it is necessary to remove the cylinder head, oil pan and oil pump with an oil pickup tube (see parts Engine repair without removal from the car - Civic models or Engine repair without removal from the car - Integra models this Chapter).
1. Using a special countersink, completely remove the traces of stepped wear from the top of the cylinders (see accompanying illustration) – act in accordance with the manufacturer's instructions attached to the drill. The step is formed at the edge of the piston stroke, approximately 6.4 mm below the upper cut of the cylinder due to mechanical metal working and carbon formation. Attempts to extract the connecting rod and piston groups without removing the stepped wear are fraught with damage to the pistons. 2. Having finished preparing the cylinders, turn the engine upside down so that the crankshaft is on top.
3. On all engines, except B18V1, in order to provide access to the connecting rod assemblies, it is necessary to remove the bridge of the main bearing caps (see Removing the crankshaft).
4. Before removing the connecting rods from the crankshaft, evaluate the amount of their axial play on the necks of the latter. Firmly insert the blade (I) measuring probe into the gap between the side wall of the lower head of the connecting rod and the cheek of the crank, fully selecting the play of the connecting rod on the shaft neck (see accompanying illustration). The total thickness of the selected probe blades will be equal to the value of the axial play of the connecting rod. Compare the measurement result with the requirements Specifications. If the value of the axial play exceeds the maximum allowable value, this connecting rod must be replaced. The axial play of a new connecting rod, or an old one on a new shaft, may be less than the lower permissible limit, in which case the connecting rod can be machined - consult with car service specialists. Check all remaining connecting rods one by one.
5a. Make sure that the lower heads of the connecting rods and their covers have identification marks belonging to your cylinder - do not confuse the connecting rod number with the connecting rod bearing size marking (see accompanying illustration).
5b. If necessary, mark yourself with a small center punch.
6. In several steps (1/2 turn per approach) Loosen the connecting rod cap nuts just enough to allow them to be unscrewed by hand. Remove the cover of the first connecting rod together with the bearing shell placed in it - try not to drop the last one.
7. Pull the lengths of the fuel hose onto the ends of the studs for fastening the cover to eliminate any possibility of accidental damage to the shaft journal and the cylinder mirror during the removal of the connecting rod assembly from the latter (see accompanying illustration).
8. Remove the insert from the lower head of the connecting rod, then, resting the wooden handle of the hammer against the bearing bed in the lower head, push the connecting rod and piston assembly through the top of the cylinder out of the engine. If resistance occurs, immediately stop removing the assembly and check that the stepped wear on the top of the cylinder has been completely removed.
9. In a similar manner, remove the remaining connecting rod and piston assemblies from the engine.
Note. The installation of the connecting rod to be removed is coaxial with its cylinder by turning the crankshaft accordingly - proceed with the extraction only after the connecting rod is located exactly parallel to the axis of the cylinder!
10. To avoid accidental mechanical damage to the bearings and loss of components, reinstall the bearing shells and secure the bearing caps to the bottom heads of your connecting rods by hand-tightening the nuts.
11. Do not remove pistons from connecting rods (see more details. Checking the condition of the components of the connecting rod and piston group).