F 550 2WD Super Duty V10-6.8L (2009)
Connecting Rod: Service and Repair
Connecting Rod Bearing Journal Taper and Out-of-Round
Connecting Rod Bearing Journal Taper and Out-of-Round
NOTE: Refer to the Engine system level for the specification.
1. Measure the crankshaft connecting rod journal diameters in 2 directions perpendicular to 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.
Connecting Rod Bearing Journal-to-Bearing Clearance
Connecting Rod Bearing Journal-to-Bearing Clearance
NOTE: Refer to the Engine system level for the specification.
NOTE: The crankshaft connecting rod journals must be within specifications to check the connecting rod bearing journal clearance.
1. Remove the connecting rod bearing cap.
2. Position a piece of Plastigage across the bearing surface.
3. NOTE: Do not turn the crankshaft during this step.
Install and tighten to specifications, then remove the connecting rod bearing cap.
4. Measure the Plastigage to get the connecting rod bearing journal clearance. The Plastigage should be smooth and flat. A changing width indicates
a tapered or damaged connecting rod or connecting rod bearing.
Connecting Rod Bend
Connecting Rod Bend
