Connecting Rod - Large End Bore

Tighten the bolts to specification, then measure the bore in two directions. The difference is the connecting rod bore out-of-round. Verify the out-of-round is within specification.
- For additional information, refer to GENERAL SPECIFICATIONS for Expedition or GENERAL SPECIFICATIONS for Navigator.
- If out of specification, install new components as necessary. For the procedure, refer to ENGINE - 4.6L AND 5.4L (2V) for Expedition or ENGINE 5.4L (4V) for Navigator.
Fig 1: Measuring Connecting Rod Bore Out-Of-Round
Courtesy of FORD MOTOR CO.