High-Pressure Oil Rail - Navistar INTERNATIONAL DT 466 Service Manual

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5. Loosen all high-pressure oil rail bolts (M8 x 90) in
a circular pattern beginning from either end.

High-pressure Oil Rail

WARNING: To prevent personal injury or
possible death, get assistance to remove or
install the high-pressure oil rail.
Figure 640 Removing the high-pressure oil rail
1. Remove all bolts and lift high-pressure oil rail
up just enough to drain as much oil out of
high-pressure oil rail before lifting it away from
cylinder head.
2. Clean outside of high-pressure oil rail using
appropriate solvent.
Figure 641 Oil inlet O-ring
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
DIAMOND LOGIC® ENGINE BRAKE
EGES-265-2
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
3. Remove oil inlet O-ring from recess in cylinder
head and discard O-ring.
Figure 642 Injector oil inlet adapter installed in
high-pressure oil rail
1. Injector oil inlet adaptor
2. Backup ring
3. Injector oil inlet seal
4. Oil inlet tube
5. Internal O-ring (not serviceable)
NOTE: It is not necessary to remove an injector oil
inlet adaptor to install a new backup ring and injector
inlet seal.
4. Remove and discard backup ring and injector
inlet seal from injector oil inlet adapters in the
high-pressure oil rail.