Connecting Rod Bearing

CONNECTING ROD BIG END DIAMETER





^ Install connecting rod bearing cap without installing connecting rod bearing, and tightening connecting rod bolts to the specified torque. Refer to "ASSEMBLY" for the tightening procedure.
^ 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 BEARING OIL CLEARANCE
Method by Calculation





^ Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the specified torque. Refer to "ASSEMBLY" for the tightening procedure.
^ Measure the inner diameter of connecting rod bearing with inside micrometer.
(Bearing oil clearance) = (Connecting rod bearing inner diameter) - (Crankshaft pin journal diameter)
Standard: 0.034 - 0.059 mm (0.0013 - 0.0023 inch) (actual clearance)
Limit: 0.070 mm (0.0028 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. Refer to "HOW TO SELECT CONNECTING ROD BEARING".

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. Refer to "ASSEMBLY" for the tightening procedure.

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. Refer to "ASSEMBLY" for the tightening procedure.
Standard: There must be crush height.
^ If the standard is not met, replace connecting rod bearings.

MAIN BEARING CAP BOLT OUTER DIAMETER





^ Measure the outer diameters ("d1", "d2") at two positions as shown in the figure.
^ If reduction appears in "A" range, regard it as "d2".
Limit ("d1" - "d2"): 0.11 mm (0.0051 inch)
^ If it exceeds the limit (large difference in dimensions), replace main bearing cap bolt with new one.

CONNECTING ROD BOLT OUTER DIAMETER





^ Measure the outer diameter "d" at position shown in the figure. If the reduction appears in a position other than "d", regard it as "d".
Standard: 7.90 - 8.00 mm (0.3110 - 0.3150 inch)
Limit: 7.75 mm (0.3051 inch)
^ When "d" exceeds the limit (when it becomes thinner), replace bolt with new one.





Main Bearing Oil Clearance





CONNECTING ROD BEARING





Undersize





Connecting Rod Bearing Oil Clearance