Ford 2C5Z-6303-BA
Crankshaft

The crankshaft main bearing journal diameters should be measured from two different directions to perform service and repair work. Any measurements failing to meet specifications require replacement of new components. You must check for taper and out-of-round conditions at each end of the main bearing journal by measuring its diameter in two directions at both ends. The measurement process must include new component installation whenever specifications are not met.

The crankshaft main bearing journal diameter needs measurement through two directions for servicing and repair work. The next step evaluates the crankshaft main bearing journal taper and out-of-round condition by diameter measurements across two directions from both ends of the journal. Begin the journal clearance check only after proving that crankshaft main bearing journals meet their specifications. Install Plastigage(R) as a strip across the bearing surfaces of each crankshaft main bearing before removing the crankshaft main bearing caps and bearing. Crankshaft rotation during this operation should always be avoided. Check the crankshaft journal clearance by putting the crankshaft main bearing cap both on and off. A Dial Indicator Gauge should be used to check crankshaft end play by placing the crankshaft at the cylinder block's rear position before zeroing the indicator then moving the crankshaft to the front position to measure and document the end play reading. Crankshaft runout is checked through measuring the main bearing journals' specifications then using the Dial Indicator Gauge to obtain the runout results by rotating the crankshaft while subtracting the lowest reading from the highest reading.

The service and repair of the crankshaft starts by using at least two measurements to check the main bearing journal diameters across each crankshaft main bearing. Test both ends of the journal by taking diameter measurements according to the first step. Start by evaluating the journal-to-bearing clearance once all main bearing journals of the crankshaft meet their specifications. Following main bearing removal and main bearing cap replacement place Plastigage(R) across each bearing surface surface. Do not turn the crankshaft when marking the journal clearance because you must first mount and then unmount the main bearing cap. To check crankshaft end play measure with a Dial Indicator Gauge by first positioning the crankshaft at the rear of the cylinder block then zeroing the indicator before moving the crankshaft to the front for recording the end play measurement. The Dial Indicator Gauge determines the crankshaft runout by rotating the crankshaft and performing a reading difference between the highest and lowest points.

The service and repair of the crankshaft starts by using at least two measurements to check the main bearing journal diameters across each crankshaft main bearing. Test both ends of the journal by taking diameter measurements according to the first step. Start by evaluating the journal-to-bearing clearance once all main bearing journals of the crankshaft meet their specifications. Following main bearing removal and main bearing cap replacement place Plastigage(R) across each bearing surface surface. Do not turn the crankshaft when marking the journal clearance because you must first mount and then unmount the main bearing cap. To check crankshaft end play measure with a Dial Indicator Gauge by first positioning the crankshaft at the rear of the cylinder block then zeroing the indicator before moving the crankshaft to the front for recording the end play measurement. The Dial Indicator Gauge determines the crankshaft runout by rotating the crankshaft and performing a reading difference between the highest and lowest points.

You should start crankshaft servicing with two directional measures of each main bearing journal diameter. The journal diameters at both ends of the main bearing journal need to be measured in two different directions to evaluate out-of-round and taper conditions. Execute the clearance test between bearing and journal only when the main bearing journal crankshaft is operationally compliant. Lay a piece of Plastigage(R) across each crankshaft main bearing surface when those bearings and caps are removed and the crankshaft remains stationary. Check the crankshaft journal clearance after putting back the main bearing crankshaft cap and taking it out again. To measure crankshaft end play you should use a Dial Indicator Gauge by placing the crankshaft at cylinder block rear position then zeroing the indicator before moving the crankshaft to the front position to record the end play measurement. A Dial Indicator Gauge aids in checking crankshaft runout measurements by rotating the crankshaft followed by subtractions of the highest reading from the lowest reading when main bearing journal specifications are met. The wear limit for the connecting rod bearing journal taper and out-of-round should be met by measuring the diameters of the crankshaft connecting rod journal in two perpendicular directions at each end of the journal.

Service and repair of the crankshaft requires measuring crankshaft main bearing journal diameters from minimum two directions. During examination you must take measurements of journal diameters in two directions at both ends of the main bearing journal to determine its taper and out-of-round condition. The next step requires examining journal clearance only after confirming that crankshaft main bearing journals meet design specifications. Install Plastigage(R) pieces across the crankshaft main bearing surfaces without moving the crankshaft before installing the main bearing cap. The crankshaft journal clearance should be checked by following the process of installing and removing the crankshaft main bearing cap. Use a Dial Indicator Gauge to check the end play of the crankshaft by first setting the crankshaft behind the cylinder block with the indicator read to zero and finally moving it in front to measure and write down the end play results. You can check crankshaft runout through main bearing journal examination followed by Dial Indicator Gauge usage which requires crankshaft rotation then a subtraction between maximum and minimum readings. The measuring process for connecting rod bearing journal taper and out-of-round requires checking connecting rod journal diameters at both ends in perpendicular directions while maintaining measurements inside the wear limits. Complete the inspection by measuring connecting rod piston clearance to validate whether it meets specifications.

The crankshaft servicing process starts with measuring two distinct directions of each main bearing journal diameter for the crankshaft. The next step involves diameter measurement of the main bearing journals in two directions at both ends. Check the journal clearance only after making sure all crankshaft main bearing journals meet the specified requirements. Use Plastigage(R) to check each crankshaft bearing surface by placing it directly on the bearing faces after removing the crankshaft main bearing and its caps. Users must avoid any rotation of the crankshaft while performing this procedure before proceeding to measure the crankshaft journal clearance with the crankshaft main bearing cap removal and installation. You should measure crankshaft end play using a Dial Indicator Gauge by placing the crankshaft in the rear position of the cylinder block while zeroing the indicator before moving it to the front to get and document the end play measurement. A Dial Indicator Gauge measures crankshaft runout by rotating the crankshaft to obtain readings which need subtraction of the lowest dial indicator value from the maximum one. Perform this test after verifying that the main bearing journals meet their specifications.

Measure the diameters in at least two directions at each end of the journal to check for taper and out-of-round condition.