Connecting Rod Bearing

CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation





^ Install connecting rod bearings to connecting rod and cap, and tighten connecting rod nuts to the specified torque. Refer to "ASSEMBLY" for the tightening procedure.
^ Measure the inner diameter of connecting rod bearing with an 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)
Limit 0.055 mm (0.0022 inch)
^ If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod bin 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 nuts 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 out of the standard, replace connecting rod bearings.





CONNECTING ROD BEARING





Undersize





Bearing Oil Clearance