Inspection After Removal
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
- Remove any residual gasket material from the flange on the after treatment DPF and the inlet of the after treatment decomposition tube with a suitable tool.CAUTION: To avoid possible engine and system damage or performance issues:
- Brush away all dirt and debris from the area prior to opening any fuel, air intake, exhaust, cooling, after treatment or other engine system.
- To avoid contamination, any open engine system ports must be closed immediately with clean care caps or an appropriate covering.
- Do not allow any debris to fall into the engine.
- Do not allow any chemical cleaners to enter the engine or any open systems during the cleaning process.
- Inspect the SCR catalyst for cracks or puncture holes, especially around the weld areas. Replace the decomposition tube and SCR assembly if it is damaged.
- Replace the decomposition tube and SCR assembly if it is soaked with oil, fuel, or coolant.
- Inspect the decomposition tube inlet for DEF deposits.
- If buildups are present, carefully scrape the buildup with a non-metallic object to remove the majority of the buildup from the catalyst.NOTE: Do not use a mechanical device to remove DEF deposits from the after treatment SCR catalyst.NOTE: Do not use water to remove DEF deposits from the decomposition tube and SCR assembly.NOTE: If crystallization buildup was present after installation, complete a stationary regeneration to make sure that any of the remaining DEF crystallization has been removed from the after treatment SCR catalyst. Refer to Aftertreatment DPF Regeneration Test .