POWER CYLINDERS 243
Figure 356 New piston cooling tubes
1. New piston cooling tube (non-knurled) – DT 4
66
engines
2. New piston cooling tube (knurled) – DT 570 an
dHT
570 engines
Figure 357 O-ring (underside) of new piston
cooling tube
1. Put a new O-ring on each piston cooling tube.
Figure 358 Installation of new piston cooling
tube
1. Piston cooling tube (6)
2. M6 x 12 bolt (6)
3. Crankcase mounting pad (6)
NOTE: The new piston cooling tubes are self aligning.
2. Position piston cooling tubes on crankcase
mounting pads.
CAUTION: To prevent engine damage, the piston
cooling tubes use a special patch type mounting bolt.
Do not substitute.
3. When installing the piston cooling tube bolts (M6
x 16), do do A or B below:
A. Install new piston cooling tube mounting
bolts (patch type).
B. Remove oil residue, and apply Loctite®
#242 to the threads of existing piston
cooling tube mounting bolts (patch type),
and install M6 x 12 bolts.
4. Tighten M6 x 16 bolts to the special torque value
(Table 33).
Engine Run-In Procedure
WARNING: To prevent personal injury or
death, shift transmission to park or neutral, set
parking brake, and block w heels before doing
diagnostic or service procedures.
If new pistons or piston rings have been installed, do
the following engine run-in procedure:
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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