INSPECTION

CRANKSHAFT OIL CLEARANCE (PLASTIC GAUGE METHOD)

This plastic gauge method is recommended as the simplest way of measuring the crankshaft oil clearance.

Measure the crankshaft oil clearance using a plastic gauge as follows:

1.Wipe off oil from the crankshaft journal surface and the crankshaft bearing inner surface.

2.Install the crankshaft.

3.Cut a piece of plastic gauge whose length is equivalent to the width of the bearing and place it on the crankshaft journal in parallel with its axis.
4.Install the crankshaft bearing cap carefully and tighten the bolts to the specified torque according to INSTALLATION SERVICE POINTS >>B<<

.
5.Remove the bolts, then remove the crankshaft bearing cap carefully.

6.Measure the largest width of the crushed plastic gauge using the ruler printed on the bag of the plastic gauge.
Standard value: 0.02 - 0.04 mm
Limit: 0.1 mm

note

The crankshaft pins and journals are fillet-rolled and must not be machined to undersize dimensions.

CYLINDER BLOCK

1.Visually check the cylinder block for scratches, rust, and any other corrosion. Also check it for cracks using a flaw detecting penetrant.
If any defect is evident, replace the cylinder block.

2.Use a straightedge and thickness gauge to check the cylinder block top surface for warp.
If the warp exceeds the specified limit, correct by grinding.
Make sure that the surface is free from remaining gasket material and other foreign matter.
Standard value: 0.05 mm
Limit: 0.1 mm
Grinding limit: 0.2 mm
3.Check cylinder walls for scratches and seizure.
If defects are evident, rebore to oversize or replace the cylinder block.

4.Use a cylinder gauge to measure the cylinder bore diameter and taper.
If the cylinder is worn badly, rebore it to an oversize and replace the piston and piston rings with ones matched with the new bore size.
The points at which the measurements should be made are indicated in the illustration.
Standard value: 75.50 - 75.53 mm
Taper: 0.01 mm