Exhaust Gas Recirculation: Testing and Inspection

EXHAUST GAS RECIRCULATION (EGR) COOLER LEAK TEST

Special Tool(s):

Special Tool(s)







1. NOTE: The original cooler mounting fasteners can be used, or M8 fasteners may be procured locally.

Using 4 M8 bolts and nuts, install the special tools to each end of the EGR cooler.
- Tighten the 4 nuts to 31 Nm (23 lb-ft).







2. CAUTION: Do not exceed 207 kPa (30 psi) at any time, excessive pressure can damage the exhaust gas recirculation (EGR) cooler.

Connect a regulated air supply and slowly adjust the air pressure until 207 kPa (30 psi) is reached, then shut off the air supply.

3. Completely submerge the EGR cooler in water. Inspect for air bubbles coming from the coolant passages.
4. Return the EGR cooler assembly to service if no leaks are detected. If leaks are detected, install a new EGR cooler assembly.