Inspection

INSPECTION

ON VEHICLE

Look at the stainless steel body of the Catalytic Converter or Diesel Oxidation Catalyst (DOC)/ Diesel Particulate Filter (DPF) assembly, inspect for bulging or other distortion that could be a result of overheating. Inspect for:
- Indiction of exhaust gas leakage such as soot trails.
- DOC/DPF pressure fittings and temperature sensor wiring for damage
- Joint misalignment
- Denting of greater then 6.3 mm (0.25 in.)
- Outer shell torn, cracked or otherwise damaged
- Loose or damaged core

OFF VEHICLE

With DOC/DPF of vehicle and separated, visually inspect DOC/DPF ceramic faces (Inlet and Outlet) for indication of damage from:

- Fuel fouling
- Oil fouling
- Coolant fouling
- Shifted or move ceramic element
- Ceramic element appears to be plugged and the soot is wet
- More then 20 cells are damaged (broken through), showing soot on the outlet face of the filter.

A fluid soaked DOC/DPF element will have a glossy sheen and a strong fuel, coolant, or oil odor.