THERMOSTAT AND MOUNTING STRUCTURE OF THE THERMOSTAT

摘要

The present invention provides a thermostat which prevents a liquid coolant from leaking out through a space left between a valve body and an insertion hole, and at the same time cuts a processing cost by decreasing work on an engine head (engine block) and a structure for mounting said thermostat. The thermostat comprises a synthetic rubber member (17g) along an axis of said valve body (17) on a periphery of the valve body intermediate between an entrance opening and an exit opening and said valve body (17) is inserted into an insertion hole (5a) formed across an liquid coolant flow path area. The valve body (17) inserted into said insertion hole (5a) and said insertion hole (5a) come into close contact via said synthetic rubber member (17g).