Connecting Rod
Connecting Rod - CleaningCAUTION: Do not use a caustic cleaning solution or damage to connecting rods can occur.
1. NOTE: If the connecting rod large end is mechanically split or cracked to produce a unique parting face, a locking joint is produced. Parts are not interchangeable.
Mark and separate the parts and clean with solvent. Clean the oil passages.
Connecting Rod - Large End Bore
1. Measure the bore in two directions. The difference is the connecting rod bore out-of-round. Verify the out-of-round is within specification.
^ If out of specification, install new components as necessary.
Connecting Rod - Bushing Diameter
1. Measure the inner diameter of the connecting rod bushing, if equipped. Verify the diameter is within specification.
^ If out of specification, install new components as necessary.
Connecting Rod - Bend
1. Measure the connecting rod bend on a suitable alignment fixture. Follow the instructions of the fixture manufacturer. Verify the bend measurement is within specification.
^ If out of specification, install new components as necessary.
Connecting Rod - Twist
1. Measure the connecting rod twist on a suitable alignment fixture. Follow the instructions of the fixture manufacturer. Verity the measurement is within specification.
^ If out of specification, install new components as necessary.
Connecting Rod - Piston Pin Side Clearance
Special Tool(s)
1. Measure the clearance between the connecting rod and the piston. Verify the measurement is within specification.
^ If out of specification, install new components as necessary.
Connecting Rod - Bearing Journal Clearance
Special Tool(s)
NOTE: The crankshaft connecting rod journals must be within specifications to check the connecting rod bearing journal clearance.
1. Remove the connecting rod bearing cap.
2. Position a piece of Plastigage across the bearing surface.
3. NOTE: Do not turn the crankshaft during this step.
Install and tighten to specifications, then remove the connecting rod bearing cap.
4. Measure the Plastigage to get the connecting rod bearing journal clearance. The Plastigage should be smooth and flat. A changing width indicates a tapered or damaged connecting rod or connecting rod bearing.
^ If out of specification, install new components as necessary.