Honda 13310-R70-A20 Crankshaft

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Before removal of the crankshaft, the drive plate, the crankshaft pulley, and piston assemblies should be first removed. The endplay of the crankshaft is checked before loosening and removing the bolts that holds main bearing cap. Thereafter, the crankshaft is lifted off from the engine. Using Plastigage on main bearing oil clearance and lubricating through main bearing caps are some of these checks. Finally, you can check again to ensure that there is a correct endplay in the crankshaft then install a new rear main oil seal.

Ensure the engine block and crankshaft are clean and inspected. Position the block upside down, remove the main bearing caps, and clean the bearing surfaces thoroughly. Install new upper main bearing inserts, ensuring oil holes align, and place lower inserts in the caps.

Remove the bolts and check the Plastigage to determine oil clearance, ensuring no dirt or oil interfered with the measurement. If clearance is incorrect, verify the bearing insert sizes and check for any taper on the crankshaft journal.

For V6 engines, the rear main oil seal retainer must be unbolted from the block prior to crankshaft removal.