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.

WARNING:

When using compressed air for cleaning, to avoid the risk of personal injury from flying debris and dirt:
- Do not exceed 207 kPa (2.111 kg/cm ² , 30 psi).
- Wear appropriate eye protection and protective clothing including gloves.
To avoid the risk of injury to eyes and skin, when using caustic solutions, solvents, acids, or alkaline materials follow the manufacturer's recommendations for use and wear appropriate eye protection and protective clothing. Some of these materials are also flammable. To avoid risk of fire or burns, never smoke or allow sparks or flames (such as pilot lights, electrical switches, or welding equipment) in the work area. Avoid spilling onto a hot exhaust manifold which can cause a fire.

EGR cooler inspection

Prior to cleaning, inspect the EGR cooler for internal leaks.
Check for coolant, or signs of coolant, (light colored deposits) in the EGR valve. Check for small amounts of soot in the coolant that has been drained from the vehicle.
Inspect the EGR cooler for signs of external leaks or cracks.

Cleaning EGR cooler

Use solvent to clean the soot from the inside of the EGR cooler.
Use compressed air to dry the inside of the EGR cooler.
If any solvents or cleaners entered the coolant side of the EGR cooler, use clean water to flush the coolant side of the cooler to prevent these solvents or cleaners from entering the cooling system.