- Note the orientation of
paired connecting rods on each crankpin. The notches in the connecting rod
cap must be facing each other.
- Before removing the connecting rods, check the connecting rod
end play using the following procedure:
| 2.1. | Tap the connecting rod to one end of the crankshaft journal with
a dead-blow or wooden hammer. |
| 2.2. | Using feeler gages, measure the clearance between the crankshaft
counterweight and the connecting rod. |
| 2.3. | The connecting rod end play should not exceed 0.500 mm
(0.020 in). |
| 2.4. | If the end play exceeds the specified limits, measure the width
of the crankpin end of the connecting rod. |
| 2.5. | The width of the crankpin end of the connecting rod should be
21.745 - 21.805 mm (0.856 - 0.858 in). |
| 2.6. | If the connecting rod width is significantly smaller than specified
and severe wear is present on the side of the connecting rod, replace the
connecting rod. |
| 2.7. | If the connecting rod width is within specification and excessive
scoring is present on the crankshaft journals, replace the crankshaft. |
- Using a paint stick or permanent marker, number each piston face.
Draw an arrow along the centerline of the piston pointing toward the front
of the engine.
Notice: Do not use a stamp, punch or any other method that may distort or stress
the connecting rod or connecting rod cap. Extensive engine damage may result
from a connecting rod that is distorted or stressed.
Important: Do NOT stamp or use a punch to mark a powdered metal connecting rod
for identification.
- Mark the cylinder number on the connecting rod and the connecting rod
cap with paint stick, scribe or permanent marker. The connecting rod caps
must remain with the original connecting rod.
Notice: Powdered metal connecting rods have rod bolts which yield when torqued.
If the rod bolts are loosened or removed the rod bolts must be replaced. Rod
bolts that are not replaced will not torque to the correct clamp load and
can lead to serious engine damage.
- Remove the connecting
rod bolts.
- Remove the connecting rod cap.
- Push the connecting rod
and the piston assembly down through the top of the cylinder. Do not scratch
the crankshaft journal or the cylinder wall when removing the connecting rod
and the piston assembly.
- Remove the connecting rod bearings. NEVER re-use the connecting
rod bearings. Refer to
Crankshaft and Bearing Cleaning and Inspection
for inspection.
- Reattach the connecting rod cap to the connecting to prevent damage
to their mating surfaces. The cap and rod are a matched set and must be kept
together.
