Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power

Engine Marine/Industrial 4.3L 6-73
17. Inspect the connecting rod for twisting.
18. Inspect the connecting rod for damage to the bearing cap
and bolt threads.
19. Measure the piston compression ring end gap.
Important: Fit each compression ring to the cylinder in which it will
be used.
20. Place the compression ring into the cylinder bore.
20.1. Push the compression ring into the cylinder bore to
approximately 6.5 mm (0.25 in) above the ring travel.
The ring must be square to the cylinder wall.
20.2. Use a feeler gauge in order to measure the end gap.
20.3. Select another size ring set if the end gap exceeds
specifications. Refer to Engine Mechanical
Specifications.
156169
Piston Selection
Tools Required
J 8087 Cylinder Bore Gauge
Important: Measurements of all components should be taken with
the comonents at normal room temperature.
For proper piston fit, the engine block cylinder bores should not
have excessive wear or taper.
A used piston and piston pin set may be reinstalled if, after
cleaning and inspection, the piston and piston pin are within
specifications.
1. Use the J 8087 in order to measure the cylinder bore
diameter. Measure at a point 64 mm (2.5 in) from the top of
the cylinder bore and 90 degrees to the crankshaft
centerline.
4968
4972
2000 Marine/Industrial