6.7L Cummins Exhaust System – Aftertreatment Inlet and Outlet – Clean and Inspect for Reuse

Inspect the aftertreatment inlet and outlet canisters for cracks or other damage.
Inspect the exhaust gas temperature sensor boss threads for damage, if the sensor was removed.
Inspect the aftertreatment diesel particulate filter differential pressure sensor tube boss threads for damage, if the tube was removed.
If thread damage is found on the exhaust gas temperature sensor boss threads or differential pressure sensor tube
boss threads, a helicoil must be used for repair.
Inspect the aftertreatment inlet for signs of residue. If oil residue is present, steam clean the aftertreatment inlet
and OEM tailpipe between the turbocharger outlet and aftertreatment inlet.
NOTE: Do not steam clean the aftertreatment inlet if the aftertreatment diesel oxidation catalyst is integrated into
the aftertreatment inlet.

Flange Preparation – Use a putty knife to remove any residual gasket material from the flanges on the aftertreatment diesel particulate filter.
Avoid dropping fragments of gasket material into the aftertreatment diesel particulate filter.
Do not use compressed air to remove fragments of gasket material that have fallen into the filter during gasket removal.
Do not grind on the flange surface, as this can damage the flange and cause the connection to leak.

Inspect the v-band clamps and mounting straps for signs of over-extension.
The band must not be bent or damaged.
Inspect the v-band clamp and mounting strap threads for damage.
Replace the v-band clamp or mounting strap if damage is found.