The varying applications and divergent technologies of the internal combustion engine call for thermostats featuring different operating characteristics and modes of operation. For this reason, the Wahler thermostat program covers a remarkably broad performance range.

With their accurate coolant control, these rugged and maintenance-free devices are based on the operating principle developed by Wahler, and have stood the test of time for several decades.

Comprised of insert and housing, these modules are fully integrated into the engine.

Characterized by a broader working range, they adjust the internal engine temperature as needed in response to control signals from engine management. Because these devices contribute to reducing fuel consumption, they may be deserving of the attribute “environmentally friendly”.

Controlled by engine management independent of temperature, these thermostats facilitate variable control of the valve opening. They also aid in reducing fuel consumption, helping to conserve precious environmental resources.

Distinguished by their construction from thermostats with annular slide valves, these are used when high positioning accuracy of the slide valve and continuously variable, precision flow control is required.

Factory-preset to a fixed temperature range, they control the lubricating oil circulation within that range.

These devices accurately convey temperature information from thermal management to associated electrical circuits. Fast, reliable and maintenance-free, they ensure a long engine life.