CONNECTING ROD - BUSHING DIAMETER Ford Explorer III

CONNECTING ROD - BUSHING DIAMETER

Measure the inner diameter of the connecting rod bushing, if equipped. Verify the diameter is within specification.

Scheme 53

1. Refer to the appropriate ENGINE article for the procedure.
2. If out of specification, install new components as necessary. Refer to the appropriate ENGINE article for the procedure.

Scheme 54

1. Measure the connecting rod bend on a suitable alignment fixture. Follow the instructions of the fixture manufacturer. Verify the bend measurement is within specification. Refer to the appropriate ENGINE article for the procedure. If out of specification, install new components as necessary. Refer to the appropriate ENGINE article for the procedure.

Scheme 55

1. Measure the connecting rod twist on a suitable alignment fixture. Follow the instructions of the fixture manufacturer. Verify the measurement is within specification. Refer to the appropriate ENGINE article for the procedure. If out of specification, install new components as necessary. Refer to the appropriate ENGINE article for the procedure.

Scheme 56

1. Measure the clearance between the connecting rod and the piston. Verify the measurement is within specification. Refer to the appropriate ENGINE article for the procedure. If out of specification, install new components as necessary. Refer to the appropriate ENGINE article for the procedure.

Scheme 57

Note. The crankshaft connecting rod journals must be within specifications to check the connecting rod bearing journal clearance.

Scheme 58

Scheme 59

1. Remove the connecting rod bearing cap.
2. Position a piece of Plastigage across the bearing surface.
3. Install and tighten to specifications, then remove the connecting rod bearing cap.
4. Measure the Plastigage to get the connecting rod bearing journal clearance. The Plastigage should be smooth and flat. A changing width indicates a tapered or damaged connecting rod or connecting rod bearing. Refer to the appropriate ENGINE article for the procedure. If out of specification, install new components as necessary. Refer to the appropriate ENGINE article for the procedure.

Scheme 60

1. Inspect the roller for flat spots or scoring. If any damage is found, inspect the camshaft lobes and valve tappet for damage.

Scheme 61