OEM Jeep Commander Rod Bearing

Jeep Commander Rod Bearing Parts and Q&A

• Bearings
  68052222AB
  Q: What Are the Key Steps to Inspect and Install Rod Bearings on Jeep Commander?

  A:

  Check the rod bearings for scoring, examine them for signs of normal wear and check for grooving, fatigue and pitting. Replace any bearing that has unusual wear. Look for scoring, nicks or burrs on the connecting rod journals, since misaligned or bent rods can cause Pistons, piston rings, cylinder walls, connecting rod bearings and Crankshaft connecting rod journals to wear unevenly. When you spot wear or damage showing the rod is out of alignment, check it and replace misaligned, bent or twisted connecting rods. Remove excess oil from the connecting rod journal, cover the top bearing insert with oil and place it in the connecting rod so it is centered. At points A and B, make certain the gap you measure is narrower than 0.50mm (0.0196 inch). Apply compression from a piston ring compressor and the Special Tool 8507 pins to place the rod and piston assemblies, making sure the oil slinger on the rod is near the front and the "F"s on the wrist pin toward the front. Before installing the mains shims, place the lower bearing insert in the cap and center it, then put a strip of Plastigage over the full length of the insert in the bearing cap's center. Insert the bearing cap and connecting rod on the journal and then secure them with bolts torqued to 27 Nm (20 ft. lbs.) plus a 90° turn, without rotating the crankshaft to protect the Plastigage. After taking off the bearing cap, measure the thickness of the compressed Plastigage to check how much the bearing is touching the journal because the bearing-to-journal clearance must fall within the required Engine Specifications. Differences in clearance can be the result of a tapered bearing, a bent connecting rod or something caught between the insert and the cap or rod. When an acceptable clearance is marked, take out the Plastigage and go ahead with installation. If the clearance exceeds the recommendations, find the right barrel set since rods bolts cannot be safely used again and should always be renewed whenever one comes loose or is removed. Repeat the Plastigage measurement, install the chosen bearing when it fits and tighten the connecting rod bolts to 27 Nm (20 ft. lbs.) plus a 90° turn. Pull the engine apart, use a feeler gauge to ensure the side clearance is correct and attach a connecting rod from the replacement kit if it's off by even half a millimeter.