Checking Counterbore Depth; Surface Gauge Method; Depth Micrometer Method; Checking Cylinder Sleeve Protrusion - Navistar INTERNATIONAL DT 466 Service Manual

Checking Counterbore Depth

Use one of the following methods to check the depth
of the crankcase counterbore:

Surface Gauge Method

NOTE: Clean counterbore surface and remove
existing shims if any before measuring counterbore
depth.
Figure 325 Checking counterbore depth with
surface gauge
1. Place the indicator tip of the surface gauge on the
crankcase. Zero the dial indicator.
2. Move the indicator tip onto the counterbore ledge.
Record the counterbore depth reading on the dial
indicator.
3. Take counterbore depth measurements at four
evenly spaced locations around the counterbore
ledge.
4. Compare the counterbore
between the four measurements with those
listed in specifications (Table 32).
If the maximum variation between the four
measurements exceeds
resurface the counterbore.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
POWER CYLINDERS

Depth Micrometer Method

NOTE: Clean counterbore surface and remove
existing shims if any before measuring counterbore
depth.
Figure 326 Checking counterbore depth with
depth micrometer
1. Place a depth micrometer onto the counterbore
2. Take counterbore depth measurements at four
3. Compare
depth variation

Checking Cylinder Sleeve Protrusion

CAUTION: To prevent engine damage, do not apply
holding adapters to the "fire dam" ridge of the cylinder
the specification,
sleeve. Clamping forces should not be applied to this
ridge as internal cracking could develop adjacent to
the shim land.
EGES-265-2
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
ledge. Record the counterbore depth reading.
evenly spaced locations around the counterbore
ledge.
the counterbore
between the four
specifications.
If the maximum variation between the four
measurements exceeds
resurface the counterbore.
229
depth variation
measurements with
the specification,