ENGINE
2.14
ENGINE INSPECTION PROCEDURES, CONT.
Piston Ring Installed Gap
1. Position piston ring 1/2
″
(1.3 cm) from the top of the
cylinder using the piston to push it squarely into
place. Measure installed gap with a feeler gauge at
both the top and bottom of the cylinder. Replace
rings if the installed end gap exceeds the service
limit.
PIston Pin Hole Inspection
2. Using a telescoping gauge or similar bore gauge,
measure the inside diameter of the piston pin hole
on both sides of the piston. Replace if diameter
exceeds .395″ (10.03 mm)
PIston Pin Inspection
3. Inspect the surface of the piston pin for damage.
Measure the diameter of the piston pin in three
areas with a micrometer. The service limit for the
piston pin is .393″ (9.980 mm).
Connecting Rod Inspection
4. Inspect the inner surface of the small end of the
connecting rod for wear or damage. Oil and install
needle bearing and pin in connecting rod. Rotate
pin slowly and check for rough spots or any
resistance to movement. Replace both pin and
bearing if there is any resistance to rotation.
Measure the inner diameter of the small end of the
connecting rod. The service limit is .553″ (14.04
mm.)
Piston Ring Installed Gap
Service Limit:
.030I (0.75 mm)
Piston Pin Hole
Service Limit:
.395I (10.03 mm)
Piston Pin
Service Limit:
.393I (9.980 mm)
Connecting Rod Small End
Service Limit
.553I (14.04 mm)
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