What do you put on coolant temp sensor threads?

What do you put on coolant temp sensor threads?

Straight thread requires a sealing ring. Do not use teflon tape, use something like Permatex High Performance Thread Sealant.

Why is there a sealing ring around the coolant temperature sensor?

A common source of coolant leaks is the coolant temp sensor (auxiliary fan switch) located in the lower radiator hose. The rubber o-ring deforms as it’s installed. This seal is a direct replacement for the sensor o-ring and will stop your leak.

Can you use Teflon tape on coolant lines?

Registered. Teflon tape is usually not used on higher temperature fittings. It shrinks with heat. I would use a automotive sealant.

Can a temperature sensor leak?

These seals can leak. You can also now check the housing for cracks or damage. Remove the temp sensor and look for signs of the coolant leaking past either around the outside or inside of the sensor location o ring.

Should I use PTFE tape on radiator valves?

If you are installing a new central heating component (like a radiator or a radiator valve) then it’s advisable to use PTFE tape AND some silicone-based jointing compound, to make the joint completely watertight. Most plumbers will recommend using the PTFE tape and jointing compound on any new heating installation.

What temperature can Teflon tape withstand?

PTFE is completely stable up to +260˚C (500˚F). Decomposition is slow up to 400°C (750°F).

How do you replace a coolant temperature sensor?

Hand start and finger tight the sensor in the engine. Then tighten the sensor with a six-point wrench, deep socket or line wrench. Torque the sensor to the specification listed in your repair or service manual. Apply the correct torque: Overtightening the new unit may ruin the threads or bottom out the sensor against the engine and break it.

What happens if your coolant sensor is closed?

A permanently closed (electrically shorted) coolant sensor will cause an increase in fuel consumption and potential damage to the catalytic converter. A permanently open (broken circuit) coolant sensor will starve the engine of fuel. Luckily, this is a simple repair on most vehicle models.

Do you have to put rubber seal on new thermostat?

Most new thermostats come with their own gaskets or rubber seal, but not all. So check that your new thermostat includes one; otherwise, buy one. Remember that you may need to apply sealant to the new gasket—check your vehicle service manual. Only use the sealant recommended by your car manufacturer and use a small amount.

How do you remove a CT sensor from a radiator?

Place a clean drain pan under the radiator, open the radiator valve and drain about two to three quarts of coolant (or just enough to drop the level below the sensor). Then close the drain valve. This will minimize coolant waste when you remove the CT sensor. 3. Locate the CT sensor.