I have swapped the gauges to AutoMeter ones. One of them is the Engine Coolant Temperature Gauge. First i have connected OEM Coolant Temperature Sensor which is mounted on the engine, but I do get higher temperature readings. I have contacted AutoMeter and they have mentioned that this is due to sensor not being calibrated to their gauge and recommended to get AutoMeter Sensor. I have purchased AutoMeter 2385 Sensor and Radiator Hose Sensor Adapter.
My question is which hose should I use for the Sensor installation: Upper or Lower radiator hose?
When the engine is off my upper hose doesn't have the coolant and soft on touch. Does this hose pressurized before the thermostat is open? My understanding that till thermostat is open coolant is circulated avoiding the radiator which means my sensor would not read the temperature. When thermostat is open does the upper hose gets fully filled with coolant? I believe sensor need to be submerged in the coolant to read it's temperature. I think lower is always full of coolant, but the flow of coolant is from the engine through upper hose to radiator and back through lower to the Engine, meaning that lower hose will always be showing cooled temperature as it comes from coolant passed through radiator and already cooled down and this would be not true engine temperature.
My question is which hose should I use for the Sensor installation: Upper or Lower radiator hose?
When the engine is off my upper hose doesn't have the coolant and soft on touch. Does this hose pressurized before the thermostat is open? My understanding that till thermostat is open coolant is circulated avoiding the radiator which means my sensor would not read the temperature. When thermostat is open does the upper hose gets fully filled with coolant? I believe sensor need to be submerged in the coolant to read it's temperature. I think lower is always full of coolant, but the flow of coolant is from the engine through upper hose to radiator and back through lower to the Engine, meaning that lower hose will always be showing cooled temperature as it comes from coolant passed through radiator and already cooled down and this would be not true engine temperature.
