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How to Replace Coolant Temperature Sensor 1981-2005 Chevy Monte Carlo

Created on: 2014-07-08

Watch this video to learn how to fix your coolant temperature sensor. The experts at 1A Auto show you how to replace the sensor on your 00-08 Chevy Monte Carlo.

  1. step 1 :Removing the Temperature Sensor (With a Deep Socket)
    • Disconnect the temperature sensor wiring harness
    • If a deep 19mm socket is available, remove the temperature sensor and proceed to Step 4
  2. step 2 :Removing the Air Intake Hose
    • Pull the smaller hose out of the air intake hose
    • Disconnect the intake hose wiring harness
    • Loosen the two intake hose clamps with a flat blade screwdriver
    • Separate the intake hose from the engine
    • Separate the intake hose from the air intake box
  3. step 3 :Removing the Throttle Body
    • Remove he two 10mm bolts from the throttle body bracket
    • Remove the 10mm nut from the throttle body bracket
    • Pull the throttle body bracket aside
    • Disconnect the throttle body wiring harnesses
    • Loosen the throttle body hose clamps with pliers
    • Pull the hoses off the throttle body
    • Remove the 13mm nut from the throttle body
    • Remove the 13mm bolt from the throttle body
    • Remove the 13mm stud from the throttle body
    • Disconnect the cable from the throttle body
    • Pull the throttle body up and out
  4. step 4 :Replacing the Temperature Sensor (Without a Deep Socket)
    • Disconnect the temperature sensor wiring harness, if you have not already done so
    • Remove the temperature sensor, if you have not already done so, with a 19mm wrench
    • Quickly thread the new sensor into place
    • Tighten the new sensor with a 19mm wrench or a 19mm socket and ratchet
    • Reconnect the sensor wiring harness
    • If you did not use the deep socket, continue to the following steps
  5. step 5 :Reinstalling the Throttle Body
    • Start the upper 13mm bolt into the throttle body
    • Clip the cable to the throttle body
    • Push the throttle body into place
    • Tighten the top 13mm bolt
    • Insert the 13mm stud into the throttle body
    • Push the hoses onto the throttle body
    • Tighten the hose clamps with pliers
    • Fasten the 13mm nut onto the throttle body
    • Put the throttle body bracket into place
    • Insert the two 10mm bolts into the throttle body bracket
    • Fasten the 10mm nut onto the throttle body bracket
    • Connect the throttle body wiring harnesses
  6. step 6 :Reinstalling the Air Intake Hose
    • Push the intake hose onto the air intake box
    • Push the intake hose onto the throttle body
    • Tighten the intake hose clamps with a flat blade screwdriver
    • Connect the smaller hose to the intake hose
    • Connect the intake hose wiring harness
    • Clip the intake hose wiring to its bracket

Tools needed

  • 13mm Socket

    Flat Blade Screwdriver

    19mm Wrench

    19mm Socket

    10mm Socket

    Slip-Joint Pliers

    Ratchet

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

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 coolant temperature sensor on this 2003 Chevy Monte Carlo with the 3.4 liter V6 engine, and the items you'll need for this, is a 19 millimeter deep socket and ratchet, and If you don't have one of those, it's going to be a slightly different procedure, and you're going to need a 10 and 13 millimeter socket and ratchet, a flat-blade screw driver, a pair of pliers, and a 19 millimeter wrench.

Your coolant temperature sensor is right down in here. You can actually get to it if you move this. You can reach your hand in. There is a tab on top, you can grab hold of with your finger and disconnect it. If you have a deep 19 millimeter socket, you can change it out without even having to remove the throttle-body, if you don't have that socket, we're going to show you real quick how to remove the throttle-body.

Now, just pull up on this hose and disconnect this harness, and then loosen up these two hose clamps. Pull this hose free from the engine, and then pull this hose free from your intake box, and just set that aside.

Next, remove those two ten millimeter bolts and this ten millimeter nut, right here. Now, pull this bracket down and set it aside, and then, pull out on this harness and pull it free. Do the same with this harness, and then push the tabs together on this hose clamp and slide it back. Do the same for the hose clamp on the other side. Now, just push that hose back, and then remove that 13 millimeter nut right there and then you want to remove that 13 millimeter bolt and this 13 millimeter stud bolt right here. We'll fast forward as Mike does that. Now, pull up this cable, and you want to just disconnect it from the top here, and then just lift the throttle body up and out. Lift up on the tab and disconnect the harness. Using your 19 millimeter wrench loosen up the sensor.

Once it gets to the point where you can pull it free, have the other one ready. Pull the old sensor free, and immediately push your new sensor into place and twist it in. We'll just fast forward as Mike tightens that up. Now, reconnect your harness. Take your throttle-body with the upper bolt in place and take this bracket and re-clip the wire to the top of the throttle-body, and then just run it down the track. Then, push the throttle-body back into place. Just tighten up this bolt. We will fast forward as Mike replaces the other bolts that hold the throttle-body into place, and tightens them up.

Now, push these hoses back on to this line, and just push the teeth together on the hose clamps and slide them back down into place. Then, we'll fast forward as Mike replaces the nut that holds that line into place and tightens it up. Now, take this bracket, and put it back into place, and replace the nut and two bolts that hold it into place. Re connect your harnesses, and then take your intake hose and push it back onto mass airflow sensor first, and then down onto the throttle-body. Then, just tighten up those hose clamps; you want to make sure the hose is all the way on before you do that. When you disconnected this line earlier, there's a good chance that it came free from back here, so just make sure that when you reconnect it up here that it's still connected back behind the engine there, and it just pushes right back into place. Now, reconnect this harness, and re-clip this to this bracket, and you're all set.

We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.


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