Splash water tests are used to verify the resistance to thermal shocks of components and systems (in compliance with ISO 16750-1 to -5) that are located in the splash water zone of a vehicle. This test is also employed to check the tightness of housings and casings.
A splash of cold water causes a thermal shock similar to when a vehicle drives through a pothole filled with water. The test item (e.g. an engine component) and the test chamber are heated for the test and then splashed with cold water.