Inspection

INSPECTION

CRANKSHAFT OIL CLEARANCE (PLASTIGAGE METHOD)

Oil clearance can be easily measured by using a "plastigage."

When using a "plastigage," perform measurement in the following procedure.

1. Fully wipe oil off the outside diameter of the crankshaft and inside diameter of the bearing.

2. Assemble the crankshaft.





3. Place a plastigage in length equal to the bearing width on the journal shaft straight in alignment with the shaft center.
4. Carefully install the bearing cap and tighten the bolt according to the main point of installation ]]B[[.
5. Remove the bolt, and then carefully remove the crankshaft bearing cap.





6. Measure the crushed plastigage width (area most widely crushed) using a scale printed on the plastigage bag.
Standard value:

No. 1, 2, 4, 5: 0.039 - 0.065 mm (0.0015 - 0.0026 inch)
No. 3: 0.051 - 0.077 mm (0.0020 - 0.0030 inch)
Limit: 0.10 mm (0.004 inch)


CYLINDER BLOCK

1. Visually check the cylinder block for scratch, rust and corrosion. Use a flaw detecting agent to check for cracks. If it is found faulty, repair or replace it.





2. Measure distortion on the top surface of the cylinder block using a straight edge and thickness gauge.
If distortion exceeds the limit, grind and repair it.
A gasket or the like must not be adhered to the top surface of the cylinder block during measurement.
Distortion on bottom

Standard value: Within 0.05 mm (0.002 inch)
Limit: 0.2 mm (0.01 inch)
Grinding limit: 0.2 mm (0.01 inch)
3. Check the cylinder bore for scoring or seizure. If faulty replace.





4. Measure the bore and cylindricity of the cylinder using a cylinder gauge.
If the cylinder is excessively worn, repair the cylinder and replace the piston and piston rings.
Measuring points are as shown in the illustration.
Standard value

Cylinder bore: 86 mm (3.4 inches)
Cylindricity: 0.010 mm or less (0.0004 inch)