Connecting Rod Bearing: Specifications

CONNECTING ROD BIG END DIAMETER





^ Install connecting rod bearing cap without installing connecting rod bearing, and tightening connecting rod bolts to the specified torque.
^ Measure the inner diameter of connecting rod big end with inside micrometer.
Standard: 55.000 - 55.013 mm (2.1654 - 2.1659 inch)
^ If out of the standard, replace connecting rod assembly.

CONNECTING ROD BUSHING OIL CLEARANCE
Connecting Rod Bushing Inner Diameter





Measure the inner diameter of connecting rod bushing with inside micrometer.
Standard: 22.000 - 22.012 mm (0.8661 - 0.8666 inch)

Piston Pin Outer Diameter





Measure the outer diameter of piston pin with micrometer.
Standard: 21.989 - 22.001 mm (0.8657 - 0.8662 inch)

Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connecting rod bushing inner diameter) - (Piston pin outer diameter)
Standard: 0.005 - 0.017 mm (0.0002 - 0.0007 inch)
Limit: 0.030 mm (0.0012 inch)

If the calculated value exceeds the limit, replace connecting rod assembly and/or piston and piston pin assembly
^ If replacing piston and piston pin assembly, refer to HOW TO SELECT PISTON. How to Select Piston and Bearing





^ If replacing connecting rod assembly, refer to CONNECTING ROD BEARING OIL CLEARANCE to select the connecting rod bearing.

Factory installed parts grading:





^ Service parts apply only to grade 0.





CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation





^ Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the specified torque.
^ Measure the inner diameter of connecting rod bearing with inside micrometer.
(Bearing oil clearance) = (Connecting rod bearing inner diameter) (Crankshaft pin journal diameter)
Standard: 0.020 - 0.045 mm (0.0008 - 0.0018 inch) (actual clearance)
Limit: 0.055 mm (0.0022 inch)
^ If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance.

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

CAUTION: Do not rotate crankshaft.





^ Remove connecting rod bearing cap and bearing, and using scale on 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.

CRUSH HEIGHT OF CONNECTING ROD BEARING





^ When connecting rod bearing cap is removed after being tightened to the specified torque with connecting rod bearings installed, the tip end of bearing must protrude.
Standard: There must be crush height.
^ If the standard is not met, replace connecting rod bearings.

CONNECTING ROD BEARING:

CONNECTING ROD BEARING

Undersize:

Undersize

Connecting Rod Bearing Oil Clearance:

Connecting Rod Bearing Oil Clearance