EGR COOL ER AND TUBING 103
Modification 1 – Deeper O-ring
Location into EGR Coolant Return
Tube plus Retaining Clip
Removal of EGR Coolant Return Tube and Elbow
CAUTION: To prevent engine damage, do not mix the
new longer leg EGR coolant return tube elbow with the
original short adapter end EGR cooler return tube.
The EGR coolant return tube and mating elbow were
redesigned as a production running change to locate
the elbow O-ring one inch deeper into the EGR
coolant return tube. Both the EGR coolant return tube
and EGR coolant return elbow were redesigned to
accomplish this. The EGR coolant return tube has
a one inch longer arm to locate the O-ring one inch
deeper into the EGR coolant return tube adapter end.
1. Drain coolant to a level below the cylinder head.
2. Remove bolt from EGR return tube located at
back of cylinder head. Retain bolt for reuse with
new EGR cooler return tube assembly.
3. If applicable, remove two set screws or retaining
clip retaining the EGR cooler elbow.
4. Remove EGR return tube and elbow as an
assembly by lifting it out of the EGR cooler.
Installation of EGR Coolant Return Tube and
Elbow
1. Install two O-rings onto EGR cooler elbow and
one O-ring onto pilot of EGR coolant return tube
assembly.
CAUTION: To prevent engine damage, do not use
engine oil or any other petroleum based products on
EGR coolant return tube or elbow O-rings. These
O-rings are not compatible with petroleum based
lubricants.
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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