Connecting Rod Bearing

CONNECTING ROD BEARING (BIG END)





^ Install the connecting rod cap without the connecting rod bearing installed. After tightening the connecting rod bolt to the specified torque, measure the connecting rod big end inner diameter using an inside micrometer.
Standard: 48.000 - 48.013 mm (1.8898 - 1.8903 inch)

CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)
Inner Diameter of Connecting Rod (Small End)





^ Measure inner diameter of bushing.
Connecting rod small end inner diameter
Grade No. 0: 20.000 - 20.006 mm (0.7874 - 0.7876 inch)
Grade No. 1: 20.006 - 20.012 mm (0.7876 - 0.7879 inch)

Connecting Rod Oil Clearance (Small End)





(Connecting rod small end oil clearance) = (Inner diameter of connecting rod small end) - (Outer diameter of piston pin)
Standard: 0.005 - 0.017 mm (0.0002 - 0.0007 inch)
^ If the measured value exceeds the standard, replace the connecting rod assembly and/or piston and piston pin assembly.
^ If replacing the piston and piston pin assembly, refer to the "Piston Selection Table" to select the piston corresponding to the applicable bore grade of the cylinder block to be used.

Factory Installed Parts Grading:





Service parts apply only to grade 0.





OIL CLEARANCE OF CONNECTING ROD BEARING
Method of Measurement





^ Install the connecting rod bearings to the connecting rod and the cap, and tighten the connecting rod bolts to the specified torque. Using an inside micrometer measure the inner diameter of connecting rod bearing.
(Oil clearance) = (Inner diameter of connecting rod bearing) - (Outer diameter of crankshaft pin)
Standard: 0.028 - 0.045 mm (0.0011 - 0.0018 inch)
Limit: 0.10 mm (0.0039 inch)
^ If clearance cannot be adjusted within the standard, grind crankshaft pin and use undersized bearing.

Method of Using Plastigage





^ Remove oil and dust on the crankshaft pin and the surfaces of each bearing completely.
^ Cut the Plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil holes.
^ Install the connecting rod bearings to the connecting rod cap, and tighten the connecting rod bolts to the specified torque.

CAUTION: Never rotate the crankshaft.

^ Remove the connecting rod cap and bearings, and using the scale on the Plastigage bag, measure the Plastigage width.

NOTE: The procedure when the measured value exceeds the limit is same as that described in the method by calculation.

Bearing Oil Clearance:

Bearing Clearance

CONNECTING ROD BEARING:

CONNECTING ROD BEARING

Undersize:

Undersize

Bearing Oil Clearance:

Bearing Oil Clearance