Exhaust gas system tightness testing method for motor vehicle, involves supplying smoke trail material i.e. paraffin oil, to exhaust strand, and removing fuel supply line for supplying trail material from connection element of supply device

摘要

The method involves supplying a smoke trail material i.e. paraffin oil, to an exhaust strand (14) by a supply device (20), where the smoke trail material is based on paraffin. A fuel supply line (32) is removed for supplying the smoke trail material from a connection element (24) of the supply device, and a smoke trail material supply line (26) is attached to the connection element. A physical characteristic i.e. viscosity, of the smoke trail material is adapted to a corresponding physical characteristic of a fuel. An independent claim is also included for a method for testing the tightness of an exhaust gas system of a motor vehicle.