Honda 13310-R70-A20 Crankshaft

The crankshaft is only removed after the removal of the engine, which in turn requires removal of the driveplate, crankshaft pulley, timing bell, oil pan, oil pump body, oil filter, and piston/connecting rod assemblies where applicable. But before removal, it is advisable to use a dial indi-cator to compare the end play of the crankshaft. Push the crankshaft to the rear and read the indicator and then push it to the front to take the reading which should range from 0.0030.010 inch from the zero gauge (0.0760.254 mm). Feelers can be used in checking clearance in case a dial indicator cannot be used in carrying out the exercise. Turn the main bearing cap bolts on a clockwise and anticlockwise pattern slowly and gently knock the caps, using a soft-faced hammer; then carefully lift the crankshaft out without damaging bearing inserts. For installation, guarantee that the engine block and crankshaft are clean, and their condition analyzed. Turn the block over, undo the main bearing caps and clean the bearing faces. Machine new upper main bearing inserts, make sure there are oil holes and place lower inserts in the caps. Plastigage used to check the oil clearance and make sure that it is within its standard measurements. If not, check for cleanliness and decide which size of bearing you want for your machine. After Plastigage mop up, apply little grease on the bearing areas, re-position the crankshaft and put the caps labeled 'FRONT' in front. Tighten the bolts in the right order and measure and verify the crank end play and then rotate the crankshaft to and fro. Last but not the least, fit the new rear main oil seal.

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.

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

First, measure the crankshaft endplay using a dial indicator aligned with the crankshaft. Pry the crankshaft to the rear, zero the indicator, then pry it to the front to check the reading, which should typically be between 0.003 to 0.010 inch. If a dial indicator is unavailable, feeler gauges can be used to determine clearance.