Navistar International DT 466 Diagnostic/Troubleshooting Manual page 122

118
Figure 134 EGR cooler pressure test
1. EGR cooler pressure test plates (2)
2. Air pressure regulator
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
4 ENGINE SYMPTOMS DIAGNOSTICS
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
9. Bolt EGR cooler pressure test plates to each end
of the cooler assembly.
10. Use regulated air pressure and apply no more
than 207 kPa (30 psi) to the EGR cooler assembly.
11. Submerge the EGR cooler assembly into a tank
of water. Watch for air bubbles leaving the cooler.
• If a leak is noticed, replace the EGR cooler.
• If a leak is not noticed, install the EGR cooler.
12. Fill cooling system.
13. Pressurize cooling system to 96 kPa (14 psi).
14. Inspect cylinder head (removing components as
required) for cracks, porosity, and leaking cup
plugs.