Cummins N14 STC, Celect, Celect Plus – Service Manual Engine Noise Excessive – Connecting Rod

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or Section TF in the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084.

Lubricating oil pressure is below specification

Check the oil pressure. If the pressure is low, refer to Procedure 007-028 in Section 7.

Lubricating oil level is below specification

Check the oil level. Verify the dipstick calibration and the oil pan capacity. Fill the system to the specified level. Refer to Procedure 007-009 and Procedure 007-025 in Section 7.

Lubricating oil is thin or diluted

Refer to Procedure 007-037 in Section 7. If the oil pressure is low, refer to the Lubricating Oil Pressure Low troubleshooting symptom tree in Section TS.

Connecting rod capscrews are loose or not tightened correctly

Check the torque on the connecting rod capscrews. Refer to Procedure 001-014 in Section 1.

Connecting rod bearings are damaged or worn, are not assembled correctly, or are the wrong bearings

Inspect the connecting rod bearings. Refer to Procedure 001-014 in Section 1.

Connecting rod is bent or out of alignment

Remove and inspect the connecting rods. Refer to Procedure 001-014 in Section 1.

Crankshaft journals are damaged or out of round

Inspect the crankshaft journals. Refer to Procedure 001-016 in Section 1.