ACL Jeep 4 134 (2.2L) 1941-71 Engine Connecting Rod Bearing Set

When you're rebuilding or refreshing the engine in your Jeep CJ5, CJ3, or CJ6, especially those with the 4-134 (2.2L) engine, the connecting rod bearings are a critical component. These ACL 4B9955A-040 bearings are manufactured to precise specifications, measuring 0.040 inch undersize, which is important if you've had your crankshaft ground down to match this size during an engine rebuild. Proper bearing clearance is essential for oil flow and to prevent metal-on-metal contact, which can quickly destroy your engine.

ACL has been making engine bearings for a long time, and they're known for producing well-built parts. These bearings feature a multi-layer construction designed to handle the stresses of engine operation. They are made to fit right into the connecting rods and crankshaft journals, ensuring consistent oil film thickness and proper load distribution. If your engine is making knocking noises or you're performing a full engine overhaul, replacing these bearings is a key step to restoring smooth operation and reliability.

When installing these bearings, always refer to the manufacturer's service manual for the correct torque specifications and any necessary preparation steps, such as cleaning the crankshaft journals and connecting rod bores thoroughly. Using the correct oil viscosity is also crucial for these bearings to perform as intended.