Connecting Rod: Testing and Inspection
INSPECT CONNECTING ROD ALIGNMENT1. Using a suitable feeler gauge and rod aligner, check the connecting rod alignment.
- Check for out-of-alignment
Maximum out-of-alignment: 0.05 mm (0.0020 inch) per 100 mm (3.94 inch)
2. If out-of-alignment is greater than maximum, replace the connecting rod assembly.
- Check for twist
Maximum twist: 0.15 mm (0.0059 inch) per 100 mm (3.94 inch).
3. If twist is greater than maximum, replace the connecting rod assembly.
INSPECT PISTON PIN OIL CLEARANCE
1. Using a caliper gauge, measure the inside diameter of the connecting rod bushing.
Bushing inside diameter: 22.005-22.014 mm (0.8663-0.8667 inch).
2. Using a micrometer, measure the piston pin diameter.
Piston pin diameter: 21.997-22.006 mm (0.8660-0.8664 inch).
3. Subtract the piston pin diameter measurement from the bushing in side diameter measurement.
Standard oil clearance: 0.005-0.011 mm (0.0002-0.0004 inch).
Maximum oil clearance: 0.050 mm (0.0020 inch).
4. If the oil clearance is greater than maximum, replace the bushing. If necessary, replace the piston and piston pin as a set.
5. Check the piston pin fit at room temperature.
- Coat the piston pin with engine oil and push it into the connecting rod with your thumb.
INSPECT CONNECTING ROD BOLTS
1. Using vernier calipers, measure the minimum diameter of the compressed bolt at the measuring point.
Standard diameter: 8.100-8.300 mm (0.3190-0.3270 inch).
Minimum diameter: 8.000 mm (0.3150 inch).
2. If the diameter is less than minimum, replace the connecting rod bolt