How to Replace Coolant Temperature Sensor 2001-05 Honda Civic 1-7L
Created on: 2016-05-03
Find out how to replace the thermostat temperature and drain and refill the coolant with this how-to video
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step 1 :Draining the Coolant
- Make sure the engine is cool
- Place a drain pan beneath the coolant drain plug
- Twist the coolant drain plug
- Let the coolant drain
- Remove the radiator cap
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step 2 :Removing the Coolant Temperature Sensor
- Disconnect the coolant temperature sensor wiring harness
- Remove the temperature sensor with a 24mm wrench
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step 3 :Installing the Coolant Temperature Sensor
- Insert the temperature sensor and O-ring into place
- Tighten with a 24mm wrench
- Connect the coolant temperature sensor wiring harness
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step 4 :Refilling the Coolant
- Tighten the drain plug
- Insert a funnel into the radiator opening
- If you are reusing coolant, filter the coolant with a t-shirt
- Replace the radiator cap
Tools needed
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Funnel
24mm Wrench
Drain Pan
Cloth Rags
Needle nose pliers
Anti-Freeze
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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks!
In this video, we're going to show you how to replace the cooling temperature sensor. This is a 2003 Honda Civic with a 1.7-liter V-Tech engine. Items you'll need include 24mm wrench, pliers, drain pan and funnel, and a rag. Then you may need some additional anti-freeze as well.
We have the bumper cover off, but it's not necessary. Your drain is right under the center. There's actually a little hole right under this cover, and you can see it right here, and I'm just going to use a little pair of pliers just to help us get that tight plug going. Okay, want these to turn a little bit. Just turn it out slowly, and obviously you don't want to do this while the engine is hot.
Once you get it draining, we'll move the radiator cap to allow air in and allow it to drain. The core temperature sensor's right here. Normally, the battery would be right here, but we have it removed just to make it easier to film, but there's just a tab on the connection here, plastic tab. Disconnect, you can see the tab. You press it, it comes up. Then it's a 24mm wrench, and spin the sensor right out.
We install just right back in. It has an o-ring that'll get it on there. Pull it with the wrench until it seats, and then just pull it an 8th of a turn. Reconnect your harness.
Refill your radiator fluid. We are going to refill the radiator directly first, and I like to recycle the coolant. Never as much comes out as you need to fill it anyways, so you generally can use your old coolant, and then also augment it with fresh coolant, but if you put a piece of a T-Shirt in, and then pour your old coolant in, that will filter most of the dirt out of it.
It takes a little while to drain through the T-Shirt, but it works. Obviously, make sure you have your drain closed.
Okay, you can see that's what we filtered out of the old coolant, and we'll fill it up the rest of the way with good, fresh coolant. You want to use a 50-50 mix. You can buy coolant two ways. You can buy it full strength and you have to dilute it, and you can also buy it pre-mixed.
We'll fill the radiator first, and then we'll fill the overflow bottle, and then fill it. And after you do a repair like this it's a good idea to fill it, run your car for a little while, check the level, run your car for a while again, and just keep checking the level the first few times you drive the car.
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