Inspection Before 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.
Intake System
CAUTION:
Intake air must be filtered to keep dirt and debris from entering the engine. If intake air piping or air filter is damaged or loose, unfiltered intake air will enter the engine and cause premature wear.
- Leaks in the intake system are most commonly identified by:
- Inspection of piping for cracked or loose clamps
- Application of a solution of soapy water in the suspected area and inspecting for bubbles.
- Audible hissing or visible smoke in the suspected leak area.
- Inspect the inlet air hoses for cracked hoses and damaged or loose clamps.
- Replace damaged hoses and tighten loose clamps, if necessary, to make sure the charge-air piping and hoses do not leak.
- Check for corrosion of the inlet system piping under the clamps and hoses. Corrosion can allow corrosive products and dirt to enter the intake system.
- Disassemble and clean as required.
Exhaust System
- Inspect the exhaust piping and components for cracks and damaged or loose clamps.NOTE: Leaks occurring in exhaust pipes and joints before the diesel particulate filter (DPF) are likely to be appear as soot streaks. Because soot is trapped in a properly functioning DPF it is unlikely that soot streaks will be visible for leaks occurring after the DPF.
- Disassemble and clean as required.