Big end diameter
Install the connecting rod cap without bearing. After tightening the connecting rod bolt to the required torque, use an inside gauge to measure the inside diameter of the large head.
- Standard diameter: 51.000 - 51.013 mm
Oil clearance bushing small head connecting rod
Connecting rod inner diameter
Using an inside gauge, measure the inside diameter of the small head.
- Standard diameter: 22.000-22.012mm
Piston pin outer diameter
Using a micrometer, measure the outside diameter of the piston pin.
- Standard diameter: 21.989-22.001 mm
Calculation of the oil clearance in the connecting rod bushing
(Oil clearance bushing small head connecting rod) = (Connecting rod inner diameter) - (Piston pin outer diameter)
- Standard clearance: 0.005-0.017mm
If the clearance is greater than the specified value, replace the connecting rod and/or piston and piston pin assembly.
When replacing a piston and piston pin assembly, select a piston that matches the cylinder class (see section «Piston selection procedure»).
Note: Pistons are installed complete with piston pins.