Automobile Maintenance: Engine Cooling System (Update)

This is an update to the former article on the engine cooling system : http://syed-imran-shah.blogspot.fr/2015/08/automobile-maintenance-engine-cooling.html

Coolant Expansion Tank

To make things clear, a schematic diagram of the expansion tank is given here. The internal tube is shown as a dashed line. Real pictures of this tube are also added. This tube has a bubble flare on one side to facilitate the entry of coolant and a bevel on the other side to facilitate the exit of the coolant. A rubber seal is also mounted on the tube for sealing of coolant and vapours.

To avoid fracturing the tube during flare operation, the tube should be cut with a tube-cutter. This way rough edges will be avoided. A simple tube flaring tool like the one shown in the picture would be sufficient for this operation. For bending the tube, ideal is to use the tube bender tool but it can be done with bare hands too.

The flare is shown below.

The picture below shows the bevel.

The rubber seal is shown mounted on the tube.