Q: How to replace a thermostat in a cooling system fro Saturn Vue?
A: Before assuming the thermostat is to blame for a cooling system problem, it is important to check the coolant level, the drive belt tension, and temperature gauge operation. The replacement process varies depending on the engine type and model year. For a four-cylinder engine, the steps involve disconnecting the negative battery terminal, draining the cooling system, removing the Water Pump drain bolt, separating the thermostat housing cover from the water pump, removing the inner sleeve and thermostat, and then installing the new thermostat and reassembling the components.