Raise the car.
- Check the reliability of the fastening of the brackets and clamps.
- Inspect the muffler with the carrier for burnouts, rusty spots, and scuffs.
- Replace severely dented muffler pipes.
- Rotate and stretch the rubber hangers to make sure they are free of porosity, otherwise replace.
- lower the car, see par. 29.
- Vehicles with catalytic converter: Check electrical connection and security of lambda probe.