Arrangement of a detachable heating add-on (build-on) part on a housing part

摘要

A heating add-on part is detachably fastened to part of an intake line of an internal combustion engine. The circular heating add-on part has a guide web and is for its part centred by means of a circular guide web of the part of the intake line. Provided for the purpose of fastening is a spring element consisting of two annular spring rings which enclose the two guide webs between them. The guide webs have a thickness increasing with decreasing diameter, so that under the influence of the spring biassing force the heating add-on part is pressed with its contact surface against that of the part of the intake line.