It's assumed the flywheel or driveplate, crankshaft vibration damper, timing belt, oil pan, oil pump, and piston/connecting rod assemblies have already been removed. The rear main oil seal housing must be unbolted and separated from the block before proceeding with crankshaft removal. Before removing the crankshaft, check the endplay by mounting a dial indicator with the stem in line with the crankshaft and touching one of the crank throws. Push the crankshaft all the way to the rear and zero the dial indicator, then pry the crankshaft to the front as far as possible and check the reading on the dial indicator; the distance it moves is the endplay. If it's greater than specified, check the crankshaft thrust surfaces for wear, and if no wear is evident, new main bearings should correct the endplay. If a dial indicator isn't available, feeler gauges can be used by gently prying or pushing the crankshaft all the way to the front of the engine and slipping feeler gauges between the crankshaft and the front face of the thrust main bearing to determine the clearance. Loosen the main bearing cap bridge bolts 1/4-turn at a time until they can be removed by hand, using the opposite order of the tightening sequence, and note if any stud bolts are used to ensure they are returned to their original locations when reinstalling the crankshaft. Gently tap the bridge with a soft-face hammer, then separate the assembly from the engine block, using a large screwdriver as a lever if necessary, while trying not to drop the bearing inserts if they come out with the bridge. Carefully lift the crankshaft out of the engine, ideally with the help of an assistant due to its weight, and with the bearing inserts in place in the engine block and main bearing caps, return the caps to their respective locations on the engine block and tighten the bolts finger tight.