Install it somewhere in coolant before the thermostat. (If the thermostat has bleed holes, it can be installed in the thermostat housing.) You can use a Street Tee ⅜” NPT fitting to install the coolant temperature sensor & temp gauge sending unit (or heater hose fitting) into the single port.
How do I know if my temp sending unit is bad?
Bad Coolant Temperature Sensor Symptoms
- Check Engine Light.
- Poor Mileage.
- Electrical Cooling Fans not coming on.
- Black Smoke from the Exhaust Pipe.
- Difficult Starting Condition.
- Engine Overheats.
- Poor Idling.
- Poor Engine performance.
What happens when coolant temperature sensor goes bad?
If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. This will reduce fuel economy, and may hinder engine performance.
Where is the water temperature sensor located?
It is most often located close to the thermostat of the cooling system or inside of it. The cooling system is located beneath the air intake pipe and behind the right cylinder.
How do I test a temp sender?
If you have a new sensor on hand and want to check it, you can do this easy test. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. You should have a reading of approximately 2000 ohms. Check the warm sensor in your engine.
How do you test a water temperature sensor?
Submerge your temperature sensor in the hot water and wait a few seconds to let your multimeter take a reading. Write down your reading so you can easily reference it. A hot water reading should give you around . 25 volts.
How does a temperature sender unit work?
The sending unit is a temperature-sensitive material that is part of a variable resistance, water-sealed unit that sits in the coolant stream in the engine. As the engine warms up the resistance in the sending unit is lowered gradually until the system reaches maximum heat.
