• Any inspection should include listening for hissing or rumbling that would result from a leak in the system. A stethoscope can be used. Remove the metal end from the stethoscope and use just the hose to listen.
  • An on-lift visual inspection should pinpoint any of the following types of damage:
    • Holes, road damage, separated connections, and bulging muffler seams.
    • Kinks and dents.
    • Discoloration, rust, soft corroded metal, and so forth. Mufflers often rust out on the lowest end.
    • Torn, broken, or missing hangers and clamp.