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DIAGNOSIS AND TESTING EXHAUST SYSTEM - GAS ENGINE EXHAUST SYSTEM DIAGNOSIS CHART CONDITION POSSIBLE CAUSE CORRECTION EXCESSIVE EXHAUST NOISE 1. Leaks at pipe joints. 1. Tighten flanges to specified 2. Burned or blown out muffler. 2. 3.7L/4.7L Replace muffler/tailpipe 3. Burned or rusted-out exhaust 3. 3.7L/4.7L Replace muffler/tailpipe 4. Exhaust pipe leaking at manifold 4. Tighten connection attaching nuts 5. Exhaust manifold cracked or 5. Replace exhaust manifold (Refer 6. Leak between exhaust manifold 6. Tighten exhaust manifold to 7. Restriction in muffler or tailpipe. 7. Remove restriction, if possible. 8. Exhaust system contacting body 8. Re-align exhaust system to clear LEAKING EXHAUST GASES 1. Leaks at pipe joints. 1. Tighten flanges (Refer to 11 - SPECIFICATIONS TORQUE DESCRIPTION N·m Ft.Lbs. In.Lbs. Front Exhaust to Manifold Nuts 25.7 19 - Muffler-to-Catalytic Converter flange nuts 47 35 - Steady rest bracket mounting bolts 47 35 - 11 - 4 EXHAUST SYSTEM WK |