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vsix reported tiny cracks along the muffler’s upper welds that sounded like a loose heat shield. After the cracks were welded closed, he said the rattle and an irritating buzz disappeared.

M3MATT traced a rattle to a crack near a muffler pipe connection. The owner reported a temporary improvement after applying JB Weld, with welding still planned.

USMC_DS1 replaced the water pump preventively on his 2008 C2S at over 52,000 miles. His account centers on tight access, a separate thermostat-housing gasket and careful reassembly; later replies add different owners’ pump-condition and access reports.