6.7 Cummins Coolant Temp Sensor Location (Level Sensor Guide)

When it comes time to look for a specific sensor, you need to be aware that there are 9 of them in all and they are all over the engine. Sometimes it takes a treasure map to find their locations.

The coolant temperature sensor seems to be located right under the EGR tube. It may take a small mirror to see it. It is in a hidden location that is barely visible to the naked eye. But rest assured, it is there and you may be able to access it with a little difficulty.

To learn more about this topic just continue to read our article. It has the information you want to know about so you can find this little part and replace it when it fails on you.

Where is The Temperature Sensor on a 6.7 Cummins?


The above description did not do this part any justice. It needs a far more detailed explanation and we found one at an RV discussion forum. Here is where this sensor is located:

It is into the front of the cly head, pointing up, near the front corner of the valve cover, and in the case of the truck the cast iron thermostat housing forms a " J " shape around it, to the point where the housing, connects to the upper rad hose.” (source)

To access this little part, you may have to take the EGR tube off as well as the heat shield that is right above it. It is not going to be a simple fix.

6.7 Cummins Coolant Temp Sensor Location


As you can see, the location of this little sensor is not in a convenient location. It may take some work to find and you may have to crawl under the engine to get a good view of it.

Then again, you may have to use a mirror to find it as there are so many other parts located around its position. But if you know what your EGR tube looks like, then you should start there and go down past the heat shield to find this sensor.

If you can’t see it, then you need to remove those parts blocking your view. There is only so much room underneath the hood and in the engine compartment so parts will be in the way when it is time to do some mechanical work.

What Happens When The Coolant Temperature Sensor Goes Out?


According to some experts, when this sensor goes bad, you run the risk of damaging your engine. The purpose of this temperature sensor is to help the ECM adjust the air-fuel mixture when the temperatures change.

The most common problems when this sensor goes bad are you will get a check engine light, lose your cooling fan, lose fuel mileage as well as overheat your engine.

When you see black smoke coming from your tailpipe, then you know there is a problem. The ECM did not adjust the air-fuel mixture correctly and the result is this black smoke.

The reason for the black smoke is that the excess fuel inside the system is burning. That situation produces the black smoke.

6.7 Cummins Coolant Level Sensor Location


Like the temperature sensor, the location for this part is not ideal either. While the sensor itself is located in the coolant reservoir, the reservoir is not in a convenient location.

You will find it near the passenger side wheel well. That is how you access the reservoir, through that part. Once you get that plastic fender well off, you should be able to see the sensor. It is in a sealed hole at the bottom of the tank, so you won’t lose any coolant when you remove the sensor.

However, be forewarned as many mechanics and dealers will tell you that you have to replace the sensor and the reservoir at the same time. The reason for that recommendation is that the reservoir gets deposits on its walls.

Those deposits will interfere with the sensor and make it send you false readings. Whichever way you go with this repair, should be okay. There may not be deposits in the tank when the sensor goes bad.

This is a judgment call on your part.

6.7 Cummins Coolant Level Sensor Removal


Well, we just gave you those instructions. But take your time as you will have to remove a part or two that has nothing to do with the sensor or the reservoir. They are just conveniently in the way of making some easy repairs.

There is going to be some difficulty in removing just the sensor. One mechanic had to use a pair of pliers to pull the sensor out, then they taped a small socket to a hammer to put the new one in.

So you do not have to remove the whole tank and buy a new one to replace it. The other problem is that it takes some time to remove that plastic wheel or fender well.

If you want to see what needs to be done, then just watch the video below. The video explains everything to you. It is under 2 minutes in length so you will get an idea of what to do without losing any time.

Some Final Words

Doing mechanical work on modern trucks is not easy anymore. It used to be but with all the emissions and other automotive regulations and technological upgrades, working on engines has become more like work.

It is not as much fun anymore, especially since you have to remove hard to get off extra parts just to access the one small one you need to replace. Then you have to spend the time to put those other parts back on when your task is over.

Maybe these upgrades are just a conspiracy by the automakers to make sure mechanics make more money when they do repairs.

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