How to Clean the Turbo on a 6.7 Cummins To Avoid Failure?


The first Cummins in the pickup line that was offering fantastic VGT features is 6.7L Cummins. From eliminating any turbo lag to interrogated exhaust braking, the engine has provided multiple benefits to the user side. However, if you are not very careful with the Turbo cleaning, an unexpected and unwanted failure will be a reason for you to sidestep all the amazing offerings of this amazing system.

This makes it clear that the matter of cleaning Turbo is more important than any user will ever think. And that’s basically why we are here to talk about how to clean the turbo on a 6.7 Cummins in detail.

How to Clean the Turbo on a 6.7 Cummins

So, without wasting any moment, we will jump right into the complete guide. Here we will be discussing the safest manner for you to clean the turbo without causing any damage. Let’s Get into It!

 Get Some Tools to Start With

When looking for how to clean the turbo on a 6.7 Cummins, you want to get some good stuff for cleaning it inside and outside deeply. To find the stuff, go to the store and grab the lubricant and turbo cleaner sprayer. Once, you have purchased the stuff, follow the next step.

 Take Out the Exhaust System

The next thing you want to do is to raise your vehicle on a good lift. Then, take out the exhaust system to temporarily attach the oxygen sensor by plugging in on the empty sensor hole. Tight the plugs and then lift down your vehicle.

Warm Up Your Engine

Then, you want to warm up your engine by connecting the vehicle tailpipe to the shop exhaust ventilation system and switch it on. Start your vehicle engine so that it could warm up.

After that, use your scan tool to set it rightly. To do that, go to the home menu and select PCM. Then, click to the More Options and then System Test. Put your engine speed to 2,100 RPM and follow the prompts. Then, click on Actuate and monitor your engine temperature.

If you are done warming it, make sure you have started the engine to reach the 82°C or higher temperature. Then, stop the engine and take out the turbo cleaning port access plug.

Install the Nozzle and Hose

In this process, you want to set up the nozzle and hose of the turbo cleaning tool into the right place. To install rightly, just put the nozzle and hose normally as you do and tighten them by using your hand. Try not to use the tools to tighten the surface.

Turn Turbo Cleaning Tool Tap Cutoff Valve in Closed Position

After that, you want to turn the turbo cleaning tool in a closed position. And for that, you want to follow some good tricks.

Start by steering the tap end of the cleaning tool hose that in under cable sleeves of the EGR valve. Then, turn the cleaning tool tap cutoff valve in off position. At that time, start your engine again and warm it up. Make sure the engine temperature is above 82°C.

Use the Turbo Cleaner Spray

And then, use your bought turbo cleaner spray to the turbo cleaning tool tap valve. To do it rightly, place the spray upside down to point toward it.

Ensure you have completely opened the turbo cleaning tool tap cutoff valve to spray for 5 minutes. Then, lock the turbo cleaning tool tap cutoff valve and go to the next process.

Turn On & Off Your Vehicle Engine

When cleaning the turbo cleaning tool valve, it’s quite important to pressurize it with something that helps the turbo to clean deeply.

For that, stop your engine and start it and repeat it 10 times so that the cleaner spray solution reaches all the way. Wait for 4 seconds when starting and stopping the engine.

Remove the Turbo Cleaning Tool and Nozzle

Right after you have warmed your engine, take out the turbo cleaning tool from the cleaning tool nozzle. Then, remove the cleaning tool nozzle from the turbo.

Install the Stainless-Steel Turbo Cleaning Port

Afterward, set up the stainless-steel turbo cleaning port of the turbo by tightening it to 10 Nm. Then, raise your vehicle and head to the next step.

Clean Both Oxygen Sensor after Removing Them

If you have done putting your vehicle upwards, take out the oxygen sensor to clean them. For cleaning them, take a clean cloth and compressed air to wipe it quickly.

Use your compressed air to take out all the dirt and stains easily inside the cover. Then, turn your compressed air in the center hole of the sensor shield. Use the cloth to clean the outer surface.

When doing this process, make sure all the filth is removed from the sensor tip inside and outside to continue the next step.

Attach the Oxygen Sensors to the Exhaust system

After doing all the processes rightly, you want to attach the removed oxygen sensors to the exhaust system by tightening them to 41 Nm. Then, lift down your vehicle, and with the scan tool, clear all the errors.

Wrap Up

This was our take on how to clean the turbo on a 6.7 Cummins. Hopefully, the guide will be helpful for you to understand the risks and ways involved with cleaning the turbo. Of course, you can prevent any failure by considering a through, gradual and cautious cleaning of the turbo. Just pay close attention to the points we mentioned.

Don’t forget to check the manual if there’s any caution, warning or instruction specified for the issue. That way things will be on your favor always.