6.7 Cummins Ticking Noise at Idle – What To Do Now?

6.7 Cummins Ticking Noise at Idle is a common issue on 6.7 Cummins engines. If you’re using Ram 2500 or 3500 equipped with a 6.7L Cummins Turbo Diesel engine, you should know the reasons and solutions.

We’re going to tell you the possible reasons behind the issue and some useful solutions to fix it.

There are several potential causes of this ticking noise, and it is important to have the problem diagnosed by a qualified mechanic in order to determine the best course of action.

6.7 Cummins Ticking Noise at Idle

You may have noticed a ticking noise coming from the engine at idle with your Ram 2500 or 3500. This is most likely due to the exhaust gas recirculation (EGR) system. 

The EGR system is responsible for recirculating exhaust gases back into the engine to help reduce emissions.

Over time, soot and other debris can build up on the EGR cooler, causing it to tick when the engine is idling. 

If you’re hearing this ticking noise coming from your 6.7L Cummins at idle, there’s no need to worry. It’s most likely due to the EGR system and can be easily fixed by cleaning the EGR cooler.

In addition to these reasons, there might be more possible reasons behind the problem. we will share them step-by-step.

6.7 Cummins Ticking Noise at Idle

Credit: www.youtube.com

Why Does My Diesel Tick?

If you’re one of those who are facing the same issue with their Diesel, you can assume that there might be two main reasons behind it, and they are the following:

01: The injectors might be dirty or need to be replaced.

Solution: This is a common issue with diesel, and can usually be resolved by having your injectors cleaned or replaced.

See the video to learn more about how to clean or replace the Fuel Injector in your Cummins engine.

Replacing The Fuel Injector in Cummins Engine

Injector Replacement

02: An issue with your piston rings.

piston rings in 6.7 Cummins engine
piston rings in 6.7 Cummins engine

Solution: If your piston rings are worn out or damaged, they can cause the engine to tick as well. although this isn’t the common reason, but it could be.

If you’re not sure what’s causing the ticking sound in your diesel engine, it’s best to take it to a mechanic for diagnosis and repair.

As a user, it’s normal to have less knowledge about a truck’s engine and that’s where the mechanic or expert people play a great role in repairing the thing or finding out the exact reason.

How Do You Adjust the Valves on a 6.7 Cummins?

How Do You Adjust the Valves on a 6.7 Cummins?

There are two ways that you can follow to adjust the valves. The first way is to do it manually, and the second way is to use an electronic valve adjustment tool. To adjust the valves manually, you will need to start by removing the valve cover.

Once the valve cover is off, you will be able to see the rocker arms and pushrods. You will need to make a note of where each pushrod is located so that you can put them back in the same spot when you are finished adjusting the valves.

Next, you will need to use a feeler gauge to measure the clearance between the rocker arm and the valve stem.

The ideal clearance is 0.006 inches. If the clearance is too small, you will need to loosen the rocker nut and turn the adjusting screw until it reaches the correct size.

If the clearance is too large, you will need to tighten the rocker nut and turn the adjusting screw until it reaches the correct size.

Once all of the adjustments have been made, you can put the valve cover back on and start the engine to test that everything is working correctly. If you have a 6. 7Cummins, you can also adjust the valves electronically using a special tool.

This is generally considered to be easier to do than manually, but it’s important to make sure that you follow all of the rules and instructions for using this tool correctly so that you don’t damage your engine.

2013 6.7 Cummins ticking noise?

6.7 Cummins Ticking Noise at Startup

We have seen the same issue at Idle, but are you noticing the ticking noise when starting the engine and feeling confused?

This is caused by the exhaust gas recirculation (EGR) system, and that’s considered normal. The EGR system recirculates a small amount of exhaust gas back into the combustion chamber to help reduce emissions.

When the engine is first started, the EGR system is purging itself of any accumulated exhaust gas. This purge process can cause a ticking noise that lasts for a few seconds before disappearing. So if you hear a ticking noise coming from your 6.7-liter Cummins engine at startup, don’t be alarmed.

However, I have found someone online who said that if the engine gets cold, and tries to start the engine, it can produce some ticking noises. even those people also consider this thing normally because the problem will go once the engine gets heated.

6.7 Cummins Ticking When Warm

Some people noticed that their 6.7 Cummins is ticking when the engine is warm. this is not a common issue but there is a chance to face it in the future.

I have found a person who faced the same issue with his engine. the engine produces a ticking noise once the engine gets heated. 

That guy got a solution by reading a solution from an expert person and the solution was: 

When you face the issue, you will need to do something with your lash of the geartrain and pulses of the engine. 

For this, you can pop the gear off the pump shaft and turn the shaft a few degrees and tighten it. this might help you to get rid of this ticking issue when the engine gets warmed.

6.7 Cummins Loud Idle

6.7 Cummins Loud Idle

The 6.7 Cummins is a powerful engine that is known for its loud idle. This can be a problem for some people, as the noise can be quite bothersome.

There are a few things that you can do to try and reduce the noise from your 6.7 Cummins, however, it is important to note that there is no guarantee that these methods will work for everyone.

One thing that you can do is to make sure that your engine is properly tuned. A well-tuned engine will typically have a much quieter idle than one that is not tuned correctly. You should also check your air filter and make sure that it is clean.

A dirty air filter can cause your engine to run louder than normal. Another thing you can do is to install an aftermarket exhaust system on your truck.

This will help to muffle the sound of your engine, and it may even give you a slight performance boost as well.

Finally, you could try using sound-deadening material on or around your engine bay to help reduce the overall noise level coming from your truck.

6.7 Cummins Lifter Noise

Are you facing the lifter noise upon startup? This is caused by the hydraulic lash adjusters not having enough oil pressure to properly function. The noise should go away after the engine has been running for a few minutes.

If it does not, then there may be an issue with your oil pump or an obstructed oil passage.


It’s always a confusing thing when you notice your 6.7 Cummins is ticking at idle. We know an expert can give the reasons and solutions as well but that’s not the ultimate job for such kind of truck user.

The first thing you should do is just do some research online and try to get some idea about the issue and finally, some possible solutions to try fixing the issue yourself.

If none of the reasons aren’t right and the given solutions didn’t work properly, our recommendation will be to call an expert so you can get it fixed and avoid further damage to your engine.

See Also:


  • Zayn

    John Zayn Smith is a renowned truck enthusiast, automotive industry expert, and author. Beginning his career as a mechanic, Zayn's curiosity led him to explore all facets of the trucking world, sharing his insights through in-depth articles on TruckGuider.com. His knowledge spans truck mechanics, trends, and aftermarket modifications, making him a trusted resource for both professionals and hobbyists. Outside writing and mechanics, Zayn enjoys off-roading, truck shows, and family time. Follow his work for the latest in truck-related news and tips.

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *