The sensor connected to the thermostat housing on a Chevy 305 is typically the temperature sensor or coolant temperature sensor. This sensor monitors the temperature of the engine coolant and sends that information to the engine control unit (ECU) or the gauge on the dashboard. Accurate readings from this sensor are crucial for optimal engine performance and efficiency. In some setups, there may also be a sender unit for the temperature gauge.
Drain the radiator. The thermostat is in a housing connected to the water pump. Remove the housing to replace the thermostat and gasket.
Follow the upper radiator hose back to the engine, it is connected to the thermostat housing on the engine. The thermostat is located under the thermostat housing.
connected to thermostat housing
If it has a 4.3L engine the temp sensor is located next to the thermostat housing.
The 1992 Chevy 3500 temperature sensor is located on the front of the engine. The temperature sensor will be in the vicinity of the thermostat housing.
The 1995 Chevy Silverado coolant sensor is located on the front of the engine. The coolant sensor will be a few inches above the thermostat housing.
The temp sensor for the ECM (engine control module) is next to the thermostat housing.
It is located on the intake manifold near the thermostat housing.
slim near the thermostat housing with two wires on it
1983 Chevy 305 diagram, waterneck, thermostat housing and fittings
To the left of the thermostat housing, It screews into the intake water jacket.
It is screewed into the intake manifold right beside the thermostat housing.