Abstract: A motor vehicle radiator has a tubular oil cooler 12 located in its header tank defined by a plastics header tank shell 11 and a tube plate 20. Passage of oil to the oil cooler is effected through connectors 14 which include an elastomeric sealing bush 16 which is tapered internally in its undeformed state such that upon insertion of a connecting piece 15 the bush is expanded radially outwardly into sealing contact with the header tank shell.

Abstract: A heat exchanger such as a motor vehicle radiator of the tube 5 and corrugated fin 6 type has clamping members 7 to hold the fin and tube matrix together to resist outward pressure pulsations. The clamping members are located in position by means of arms 9 which are rigidly connected to the rim 8 of a tube plate into which the tubes 5 are connected, or to any other part of the respective header tank. Sliding movement is permitted between the arms 9 and clamping members 7, so that differential thermal expansion between the clamping members 7 and the tubes 5 which have liquid running through them is taken up by the relative movement of the arms 9 and the clamping members 7. Because the clamping members 7 are of uniform section, and are not directly shaped to be secured to the header tanks, lower tooling costs are possible.