A suction pipe assembly of an internal combustion engine has a suction pipe and a cooling fluid intercooler arranged in the suction pipe. A seal chamber is provided that is delimited by at least one section of the suction pipe and at least one section connected with the cooling fluid intercooler. A seal, disposed in the seal chamber, seals the suction pipe relative to the cooling fluid intercooler. The seal is made of an initially flowable sealing material introduced into the seal chamber in an initially flowable state and subsequently cured in a curing phase in the seal chamber. The seal chamber is seal-tightly closed with the exception of at least one fill opening through which the sealing material is introduced into the seal chamber.