Excessive Blue Smoke Out Exhaust

EXCESSIVE BLUE SMOKE OUT EXHAUST






1. CHECK TSBs

NOTE: This vehicle is equipped with a Diesel Particulate Filter (DPF) which should trap most particles that would appear out of the tail pipe in the form of black or blue smoke. If black or blue smoke is coming from the tail pipe, the DPF should be inspected for damage after the root cause of the problem is diagnosed and corrected.

1. With the scan tool, check for any TSBs that may apply.

Were there any TSBs that applied to and repaired the condition?

Yes

- Perform the appropriate repair.
- Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Initial Inspection and Diagnostic Overview.

No

- Go To 2

2. CHECK THE AIR FILTER
1. Perform an inspection of the Air Filter. Check for an improper filter or signs of a restriction such as excessive debris or a filter that is out of shape.

Does the Air Filter system appear in good shape?

Yes

- Go To 3

No

- Replace the Air Filter assembly. Go To 3

3. CHECK THE CCV FILTER AND SYSTEM
1. Perform an inspection of the CCV system. Are there signs of a restriction in the system.

Are there signs of a restriction in the CCV system?

Yes

- Replace CCV Filter and determine root cause.
- Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Initial Inspection and Diagnostic Overview.

No

- Go To 4

4. CHECK THE TURBOCHARGER FOR OIL LEAK INTO THE INTAKE SYSTEM
1. Remove the inlet to the Turbocharger assembly.
2. Inspect the Turbocharger inlet compressor for oil leaking into the Air Handling system.

Was oil leaking into the Air Handling system from the Turbocharger?

Yes

- Check the Turbocharger oil drain for a restriction. If restricted, clean or replace the oil drain tube. If not restricted, replace the Turbocharger assembly.
- Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Initial Inspection and Diagnostic Overview.

No

- Go To 5

5. CHECK THE TURBOCHARGER FOR OIL LEAK INTO THE EXHAUST SYSTEM
1. Inspect the Turbocharger turbine for oil leaking into the exhaust system.

Was oil leaking into the exhaust system from the Turbocharger?

Yes

- Go To 6

No

- Go To 7

6. CHECK FOR OIL LEAKING INTO THE EXHAUST MANIFOLD
1. Remove the Turbocharger and inspect for oil leaking into the Exhaust Manifold.

Was oil leaking into the Exhaust Manifold from the Turbocharger?

Yes

- Go To 8

No

- Replace the Turbocharger assembly.
- Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Initial Inspection and Diagnostic Overview.

7. CHECK THE INTAKE SYSTEM FOR LEAKS
1. Perform the INTAKE AIR SYSTEM PRESSURE TEST procedure. Intake Air System Pressure Test.

Were any leaks found?

Yes

- Perform the appropriate repairs.
- Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Initial Inspection and Diagnostic Overview.

No

- Go To 8

8. CHECK THE VALVE TRAIN
1. Remove the Valve Cover.
2. Inspect the Valve seals. Look for any broken, brittle, or improperly installed seals.

Were problems found?

Yes

- Perform the appropriate repairs.
- Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Initial Inspection and Diagnostic Overview.

No

- Remove the Cylinder Head. Inspect for any worn or damaged pistons, piston rings, or cylinder walls. Check for excessive clearance/wear in the valve guides.
- Perform the AFTERTREATMENT INSPECTION GUIDELINE procedure. Initial Inspection and Diagnostic Overview