86 Maintenance Exhaust System Make sure the exhaust system is intact. Inspect for damage, misalignment and/or leakage. Primary system components requiring noise related inspection include muffler body, exhaust manifold, turbocharger, and all exhaust system (rigid and flexible) piping. Closely check the system for exhaust leaks. Special attention should be given to all welds, seams, gaskets, support points, clamps, couplings and connections. WARNING Hot engine! Keep yourself clear of all moving parts or hot engine parts, exhaust gases, and/or fluids. A hot engine, exhaust, and/or fluids can cause burns. Inspect all exhaust system fasteners, brackets, and clamps for damage and tightness.
Check integrity of internal muffler baffling by revving the engine through normal operating speeds. Excessive rattling sounds or very loud operation indicates a failure within the muffler. Acts that constitute tampering with the Exhaust System: Removing or rendering inoperative exhaust system components (such as the muffler, pipes, clamps, etc.).