OEM 2009 Jeep Wrangler Rod Bearing

2009 Jeep Wrangler Rod Bearing Parts and Q&A

• Q: How to measure Rod Bearing Clearance on 2009 Jeep Wrangler?

  A: Mark the bearing caps when you remove them, since the two bearing caps do not interchange. Place the bearing shells onto the rods so that the tangs fit into the machined grooves in both the caps and the rods and ensure the cap's tang is on the same side as the rod's. Put all your rods on one bank at a time until you have finished. Connecting rod bearings are found in sizes of 0.001" and 0.010", as well as 0.025 mm and 0.250 mm. Set up the bearings so that pairs of matching halves go together, not a new half with an old half and make sure not to file the rods or bearing caps. Check the diameter at the center and on both ends of the connecting rod journal for taper and out-round. Check connecting rod bearing clearances by rotating the crankshaft with the connecting rod being checked at its bottom position, wiping away oil from the part to examine and positioning a Plastigage strip over the entire width of the bearing 6.35 mm (1/4 in.) to one side and off center. Put the rod cap on while Plastigage is still in place and tighten it as described while not rotating the crankshaft. Then, remove the cap from the bearing and observe the flattened Plastigage; use the scale on the packaging to check how much the oil clearance is, while small reading differences from each side indicate tapered oil clearance. Write down every reading and if it appears the bearing is out of its wear limit, swap it out with a new one.