Connecting Rod Bearing Journal Taper and Out-of-Round
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
- Mark each connecting rod and its corresponding rod cap for correct installation.
- Using a suitable solvent, thoroughly clean the connecting rod and rod cap.
- Remove the connecting rod bearings from the connecting rod and the connecting rod cap. Install the connecting rod cap onto the connecting rod and tighten the bolts in 2 stages.
- Stage 1: Tighten to 45 Nm (33 lb-ft).
- Stage 2: Tighten an additional 90 degrees.
- Use a telescoping gauge and a 50-75 mm (2-3 in) micrometer to measure the connecting rod bearing bore. Measure and record the connecting rod bearing bore as indicated.
- Measure the connecting rod bearing bore again 90 degrees from the 1st measurement. Measure and record the connecting rod bearing bore.
- Install a new connecting rod if not within specification. For additional information, refer to SPECIFICATIONS .
- Use a telescoping gauge and a 50-75 mm (2-3 in) micrometer to measure the connecting rod bearing bore taper.
- Measure the bearing bore inside diameter near the large chamfer.
- Measure the bearing bore inside diameter near the small chamfer.
- The difference between the 2 readings is the bore taper. Install new connecting rods if not within specifications. For additional information, refer to SPECIFICATIONS .