Confirm the engine, bearing size, and production-specific parts before ordering Review oil-pressure symptoms, noise history, oil-filter debris, and any available oil analysis Understand that the condition of the crankshaft journals cannot be confirmed until the bearings are removed Have a plan for damaged journals, an incorrect bearing size, or additional parts discovered during teardown Read the complete vehicle-specific repair procedure before starting Set aside enough time—the car may remain apart longer than planned
Correct rod-bearing set for the exact engine New connecting-rod bolts when required by the chosen procedure Oil-pan gasket and any required sealing compounds Oil-pump pickup tube seal or O-ring Engine oil and oil filter for initial fill Oil for the planned early post-repair change Assembly lubricant approved for engine bearings Replacement subframe, steering, brace, and suspension hardware identified Replacement engine-mount hardware identified Brake cleaner, lint-free wipes, shop towels, and absorbent pads Paint marker, labels, bags, and a clean organizer for removed parts
Vehicle lift—or floor jack and properly rated jack stands on solid, level ground Engine support bar with the correct attachment hardware Transmission jack or safe support method for the front subframe Complete metric socket, wrench, extension, and swivel set E-Torx and specialty sockets required by the vehicle Calibrated torque wrench covering every required torque range Angle gauge or torque-angle wrench Breaker bar Crankshaft-turning tool and socket Plastigage or precision measuring tools if included in the chosen procedure Bright work lights and an inspection light Drain pans large enough for the oil and any other fluids opened Eye protection, gloves, wheel chocks, and a fire extinguisher
Save fault codes and relevant engine data before disconnecting the battery Record oil level, oil pressure, and the exact noise or symptom being investigated Photograph the engine bay, underbody, wire routing, brackets, and ground straps Confirm the steering wheel is centered and secured before disconnecting steering components Disconnect the battery according to the vehicle procedure Mark alignment-sensitive components before removal Treat rusty subframe, brace, exhaust, and suspension hardware with penetrating oil Plan how the steering rack, hubs, control arms, hoses, and wiring will be supported Clear a clean bench for bearing inspection and organized assembly Arrange transportation and parts access in case the car cannot be reassembled that day
05 Organization and cleanliness Keep every connecting-rod cap paired with its original rod and orientation Work on one connecting rod at a time unless the repair procedure specifies otherwise Label removed hardware by location instead of collecting it in one tray Protect exposed oil passages and internal surfaces from dirt and lint Never place bearing shells or cleaned caps on a dirty surface Photograph each removed bearing shell in order Record cylinder number, upper or lower position, wear pattern, and any visible damage Do not rotate the crankshaft with unsecured caps or hardware in the engine Keep measuring surfaces free of assembly lubricant when the measuring method requires them dry
06 Critical installation checks Inspect every crankshaft journal under bright light before installing new bearings Stop if a journal is deeply scored, discolored, out of specification, or catches a fingernail Confirm each bearing shell is fully seated and its locating tang is correctly positioned Keep bearing surfaces and rod-cap mating faces free of debris Apply lubricant only where the selected procedure requires it Verify bearing clearance using the approved method when called for Install each cap in its original orientation—never swap or reverse caps Install new connecting-rod bolts: 20 Nm , then one continuous 70° turn Mark each completed rod bolt only after final torque and angle Rotate the engine by hand at appropriate intervals and investigate any binding Inspect the oil pickup, oil pump area, and oil pan before closing the engine Install new aluminum windage-tray/oil-suction-plate bolts: 4 Nm , then 90° Sort the new aluminum oil-pan bolts by length before installation Torque short oil-pan bolts (M8 × 28): 8 Nm , then 90° Torque long oil-pan bolts (M8 × 92 or M8 × 112): 8 Nm , then 180°
Account for every tool, rag, plug, cap, and piece of removed hardware Verify the oil pickup and oil-pan sealing surfaces are clean and correctly assembled Reconnect every ground strap, sensor, hose, bracket, and steering connection Confirm the subframe, steering rack, engine mounts, suspension, and braces are secured Fill with the correct oil quantity and install a new filter Prime the lubrication system using an engine-safe method before allowing the engine to start Verify oil-pressure indication immediately after cranking or startup Listen for abnormal knocking and shut the engine down immediately if it occurs Inspect for oil leaks before lowering the car Scan for faults and confirm the steering and safety systems operate normally
Follow the chosen bearing manufacturer or engine builder’s break-in guidance Keep the first drive short and close to home Monitor oil pressure, oil level, temperature, noise, and warning messages Inspect the oil pan, filter housing, drain plug, and disturbed connections for leaks Recheck accessible subframe, brace, wheel, and suspension hardware as specified Schedule an alignment if the subframe or alignment-sensitive suspension components moved Perform the planned early oil and filter change Cut open or inspect the first filter for unexpected metallic debris Keep the removed bearings labeled—they tell the story of what the engine survived