Service Limits & General Specifications

CONNECTING ROD BEARING HOUSING DIAMETER (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 bearing housing big end inner diameter using an inside micrometer.
Standard 55.000 - 55.013 mm (2.1654 - 2.1659 inch)

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





^ Measure inner diameter of piston pin bushing.
Standard
Grade No. 0 22.000 - 22.006 mm (0.8661 - 0.8664 inch)
Grade No.1 22.006 - 22.012 mm (0.8664 - 0.8666 inch)

Outer Diameter of Piston Pin





^ Measure outer diameter of piston pin.
Standard
Grade No. 0 21.989 - 21.995 mm (0.8657 - 0.8659 inch)
Grade No. 1 21.995 - 22.001 mm (0.8659 - 0.8662 inch)

Connecting Rod Bushing 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)
Limit 0.030 mm (0.0012 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 Table for Selective Fitting for Piston to select the piston corresponding to the applicable bore grade of the cylinder block to be used. Refer to "PISTON-TO-CYLINDER BORE CLEARANCE".
^ If replacing the connecting rod assembly, refer to "CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)".

Factory installed parts grading








^ Service parts apply only to grade 0.

OIL CLEARANCE OF CONNECTING ROD BEARING
Method by Calculation
1. Install the connecting rod bearing to the connecting rod and cap.
2. Install the connecting rod cap to the connecting rod. Tighten to specification. Refer to "ASSEMBLY".





3. Measure the inner diameter "C of each connecting rod (big end) as shown.





4. Measure the outer diameter "Dp" of each crankshaft pin journal.
5. Calculate the connecting rod bearing clearance.
Connecting rod bearing clearance = C - Dp
Standard 0.034 - 0.059 mm (0.0013 - 0.0023 inch)
Limit 0.070 mm (0.0028 inch)
6. If the clearance cannot be adjusted within the standard of any bearing, grind the crankshaft journal and use undersized bearings. Refer to "HOW TO SELECT CONNECTING ROD BEARINGS".

Method of Using Plastigage





^ Remove oil and dust on the crankshaft pin and the surfaces of each bearing completely.
^ Cut a 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. Refer to "CYLINDER BLOCK".

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 repair limit is same as that described in "Method by Calculation ".