Mopar 53020959AB CRANKSHFT

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The crankshaft in most cases can only be removed from an engine when the engine is detached from a car and additional parts that include the flywheel, crankshaft pulley, timing chain, oil pan, oil pump, oil filter, and piston/connecting rod have been removed. To take the crankshaft endplay, place a dial gauge on the crankshaft in line with the centreline of the cylinder block. With the crankshaft turned to the rear tighten the hold down, turn the crankshaft to the extent of movement SET indicator dial and then turn the crankshaft to the front to get the READING which should be between 0.003 to 0.010 inch. Feeler gauges can be used in case one doesn't have the dial indicator in checking for clearance. Slacken off the main bearing cap bolts while they can still be undone by hand and then use a soft-faced hammer to tap the assembly up and thereby lift it off the block in this position without bending the bearing inserts. Withdraw the crankshaft slowly, if at all possible, with help and replace the main bearing cap assembly with the arrow aimed forwards. For installation you must make sure the engine block and the crankshaft must be cleaned and checked. The main bearing cap assembly and original bearing inserts should be taken off and the surfaces cleaned. Install new upper main bearing inserts into the block; oil holes must conform and install lower inserts to cap. Measuring the oil clearance of the main bearing with the help of Plastigage and comparing it with standard values if necessary. If clearance is not correct then make sure that the bearing is clean and then if required decide between the size of the bearing to be used. After cleaning Plastigage residue, apply a coat of grease on the bearing areas and the thrust faces and replace the crank shaft and the bearing caps if necessary and seal them where necessary. Secure the bolts to the recommended torque, redial crankshaft end play, and crank shaft should rotate easily with least resistance. Last but not the least the installation of the new rear main oil seal.

The crankshaft in most cases can only be removed from an engine when the engine is detached from a car and additional parts that include the flywheel, crankshaft pulley, timing chain, oil pan, oil pump, oil filter, and piston/connecting rod have been removed. To take the crankshaft endplay, place a dial gauge on the crankshaft in line with the centreline of the cylinder block. With the crankshaft turned to the rear tighten the hold down, turn the crankshaft to the extent of movement SET indicator dial and then turn the crankshaft to the front to get the READING which should be between 0.003 to 0.010 inch. Feeler gauges can be used in case one doesn't have the dial indicator in checking for clearance. Slacken off the main bearing cap bolts while they can still be undone by hand and then use a soft-faced hammer to tap the assembly up and thereby lift it off the block in this position without bending the bearing inserts. Withdraw the crankshaft slowly, if at all possible, with help and replace the main bearing cap assembly with the arrow aimed forwards. For installation you must make sure the engine block and the crankshaft must be cleaned and checked. The main bearing cap assembly and original bearing inserts should be taken off and the surfaces cleaned. Install new upper main bearing inserts into the block; oil holes must conform and install lower inserts to cap. Measuring the oil clearance of the main bearing with the help of Plastigage and comparing it with standard values if necessary. If clearance is not correct then make sure that the bearing is clean and then if required decide between the size of the bearing to be used. After cleaning Plastigage residue, apply a coat of grease on the bearing areas and the thrust faces and replace the crank shaft and the bearing caps if necessary and seal them where necessary. Secure the bolts to the recommended torque, redial crankshaft end play, and crank shaft should rotate easily with least resistance. Last but not the least the installation of the new rear main oil seal.

The elimination of the crankshaft requires that the engine be pulled out on the vehicle. Before taking the crankshaft away, it is measured using a dial indicator or feeler gauges to find out about endplay. Therefore, one should gently tap assembly with a soft-face hammer to release it from cylinder block as well as loosen main bearing cap/bedplate bolts. At this stage, another person assists in lifting crankshaft from engine very carefully. During installation, this engine block is placed bottom side up and main bearing cap assembly is removed. In addition, original bearing inserts are taken out and surfaces cleaned. Further still, new upper main bearing inserts are put in all main bearing saddles ensuring oil holes are properly lined up inside them; thrust washers are situated in right journal while lower main bearing inserts fitted into main bearing cap. Then clean faces of blocks with the journal rings and crankpin journals for bearings installations. Afterward, lay crankshaft into its position within cylinder block and verify clearance between it and other parts by using Plastigage method. The following step is putting the main bearing cap assembly onto both crankshaft's one end and cylinder block then fastening nuts appropriately. Now, remove plastigauge and scrape off any burs from contact surface of bearings If necessary lift out piston shaft from inside cylinder through these square windows which enables positioning thin film lubricating fluid on each one of bearings against rotating shaft in its place again similar manner as previously mentioned above before having returned said part back into said surrounding machined aperture there being also supplied with subsequent removal lubricated afterwards cleaning annealed metal surfaces by means again given next words since therefore towards after before although yet because so if otherwise however except along beside etc.; The main bearing cap or bedplate is installed onto the crankshaft and cylinder block, and the bolts are tightened to the specified torque. Re-measure crankshaft endplay and turn it over by hand to ensure that it moves freely. Finally, insert the rear main oil seal.