DIESEL ENGINEOn high mileage vehicles it is normal to see some exhaust staining around the turbocharger control rod area. This is not a sign of turbocharger failure.EXHAUST SYSTEM DIAGNOSIS CHARTCONDITIONPOSSIBLE CAUSECORRECTION
EXCESSIVE EXHAUST NOISE OR LEAKING EXHAUST GASES1. Leaks at pipe joints.1. Tighten clamps/bolts at leaking joints.
2. Rusted or blown out muffler.2. Replace muffler. Inspect exhaust system.
3. Broken or rusted out exhaust pipe.3. Replace exhaust pipe.
4. Exhaust pipe leaking at manifold flange.4. Tighten/replace flange attaching nuts/bolts.
5. Exhaust manifold cracked or broken.5. Replace exhaust manifold.
6. Leak between exhaust manifold and cylinder head.6. Tighten exhaust manifold to cylinder head bolts. Replace gasket if necessary.
7. Turbocharger mounting flange cracked.7. Remove turbocharger and inspect. (Refer to 9 - ENGINE/MANIFOLDS/EXHAUST MANIFOLD - REMOVAL).
8. Restriction in exhaust system.8. Remove restriction, if possible. Replace restricted part if necessary.
9. EGR pipe(s) leak.9. Tighten bolts. Replace gasket.
10. EGR assembly leak.10. Tighten bolts. Replace gaskets.
Drivability Concern - Turbo1. Vacuum hose disconnected.1. Check connections, replace as necessary.
2. Vacuum system leaks.2. Inspect for damage. Check for leaks, replace as necessary.
3. Boost pressure solenoid filter clogged.3. Replace the filter.