Cleaning Egr System Components; Inspection Of Egr Cooler - Navistar INTERNATIONAL DT 466 Service Manual

98
Figure 99 EGR cooler mounting bracket
hardware
1. EGR cooler bracket clamp
2. EGR cooler mounting bracket
3. Bolt, M12 x 120
12. Remove M12 x 120 bolt from EGR cooler
mounting bracket and exhaust manifold.
13. Remove the EGR cooler bracket clamp.
Figure 100 Removing the EGR cooler assembly
1. O-ring gasket
14. Remove the EGR cooler assembly by pulling out
from EGR cooler supply tube and discard O-ring
gasket.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
EGR COOLER AND TUBING
15. Discard gasket between EGR cooler assembly
Figure 101 EGR cooler supply tube
16. Remove EGR cooler supply tubing from rear half

Cleaning EGR System Components

1. Clean off any gasket material and carbon deposits
2. Clean mating surfaces between EGR cooler and
3. Clean mating surfaces between exhaust gas
4. Clean mating surfaces between EGR valve and

Inspection of EGR Cooler

1. Bolt EGR cooler pressure test plates (Table 11) to
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Connect air pressure to EGR cooler pressure test
EGES-265-2
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
and exhaust manifold.
of front cover. Discard O-ring from end of tube.
between the EGR cooler and exhaust manifold
mating surfaces.
exhaust gas crossover.
crossover and EGR valve.
intake mixer duct.
each end of the EGR cooler assembly.
WARNING: To prevent personal injury or
plate and regulate pressure to not more than 207
kPa (30 psi).