Will a Buick rendezvous run without thermostat?

It is not recommended to operate a Buick Rendezvous without a thermostat. The thermostat plays a vital role in regulating the engine's operating temperature, ensuring that the engine does not overheat or undercool. Without a thermostat, the engine may run too hot or too cold, both of which can cause serious damage to various engine components.

When the engine is running without a thermostat, the coolant may circulate too quickly, preventing it from absorbing enough heat from the engine. This can lead to overheating, causing damage to gaskets, seals, and even the engine itself. On the other hand, if the coolant circulates too slowly (due to the absence of a thermostat), the engine may run too cool. This can reduce the engine's efficiency, leading to increased fuel consumption and poor performance.

In conclusion, it is strongly advised to avoid operating a Buick Rendezvous or any vehicle without a properly functioning thermostat.