Performing the Sound Test

*VERY EASY*

You can often confirm the existence of exhaust system leaks by listening for them. Listen for abnormal noises such as large or small rumbles. The exhaust system should normally be quiet except for some sound at the tail pipe.

Check the integrity of exhaust system by temporarily restricting (but not completely plugging) the tail pipe for a few seconds with a clean rag while the engine is running in a well-ventilated area. Make sure the rag was not soaked in any type of petroleum fluid. The system should be nearly quiet and the normal exhaust drone should be extremely muffled. If any leaks are present, the sound will be magnified. Dispose of the rag that was used in this test.


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