F 150 4WD Pickup V8-4.6L SOHC VIN W (1998)
Crankshaft: Testing and Inspection
Journal
Connecting Rod Journal Diameter
1. Measure the crankshaft connecting rod journal diameters in at least two directions perpendicular of one another. The difference between the
measurements is the out-of-round. Verify the journal is within the wear limit specification. Undersize connecting rod bearings will need to be
installed
Connecting Rod Journal Taper
1. Measure the crankshaft connecting rod journal diameters in two directions perpendicular of one another at each end of the connecting rod journal.
The difference in the measurements from one end to the other is the taper. Verify measurement is within the wear limit. Undersize connecting rod
bearings will need to be installed.
Main Bearing Journal Clearance
NOTE: Crankshaft main bearing journals must be within specifications before checking journal clearance.
1. Remove the crankshaft main bearing caps and crankshaft main bearings.
2. Lay a piece of Plastigage across the face of each crankshaft main bearing surface.
NOTE: Do not turn the crankshaft while doing this procedure.
3. Install and remove the crankshaft main bearing cap.