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are equipped with a heat shield crimped on the top of Avoid application of rust prevention com- pounds or undercoating materials to exhaust floor pan heat shields on cars so equipped. Light over spray near the edges is EXHAUST FLEX-JOINT COUPLING DESCRIPTION A exhaust flex-joint coupling (Fig. 3) is used to secure the catalytic converter to the engine manifold. The exhaust flex-joint is welded to the catalytic converter. OPERATION This joint actually moves back and forth as the engine moves, preventing breakage that could occur CAUTION: When servicing, care must be exercised DIAGNOSIS AND TESTING EXHAUST SYSTEM CONDITION POSSIBLE CAUSES CORRECTION EXCESSIVE EXHAUST NOISE (UNDER HOOD) 1. Exhaust manifold cracked or broken. 1. Replace manifold. 2. Manifold to cylinder head leak. 2. Tighten manifold and/or replace 3. EGR Valve to manifold gasket 3. Tighten fasteners or replace gasket. 4. EGR Valve to EGR tube gasket 4. Tighten fasteners or replace gasket. 5. EGR tube to manifold tube leakage. 5. Tighten tube nut. 6. Exhaust flex-joint to manifold leak. 6. Tighten joint fasteners and/or replace 7. Exhaust flex-joint. 7. Replace catalytic converter assembly. 8. Pipe and shell noise from front 8. Characteristic of single wall pipe. EXCESSIVE EXHAUST NOISE 1. Leak at exhaust pipe joints. 1. Tighten clamps at leaking joints. 2. Burned or rusted out muffler assembly 2. Replace muffler resonator tailpipe Fig. 3 Flex-Joint Coupling—2.0L 1 – BELLOWS JX EXHAUST SYSTEM 11 - 3 DESCRIPTION AND OPERATION (Continued) |