When your vehicle overheats, it can cause a dangerous situation for yourself and other people on the road. It’s important to monitor your engine quality throughout your vacation to ensure it stays at top performance.
It’s common for 6.7 Cummins engines to overheat, so you should prepare before hitting the road. Keeping the necessary supplies in your RV is the best way to protect yourself from overheating problems.
Please continue reading to learn the most common causes of 6.7 Cummings overheating. In addition, we will teach you the best fixes you can employ when your engine overheats.
Why is Overheating Dangerous?
If your 6.7 Cummins diesel engine is overheating, it’s important that you pull over and resolve the situation immediately.
Driving an overheating engine is dangerous because it can permanently destroy the interior of your RV. In addition, when your engine gets hot enough, the pistons and cylinders can warp and require a replacement.
You could also start burning oil which will cause your entire engine to blow when you have an overheating problem. Even though 6.7 Cummins diesel engines are reliable, they can encounter overheating problems for several reasons.
Below, we will discuss the most common causes of overheating so that you can avoid these problems.
Troubleshooting 6.7 Cummins Overheating Problems
 1. Cummins Overloading
One of the most common RV problems people cause is overloading their engine with too many appliances. Unfortunately, even the most powerful engines have limits on how many appliances you can run simultaneously. If you want to add extra loads to your RV, investing in a portable generator for assistance would be best.
Check your 6.7 Cummins user manual to understand how much load your vehicle can handle. You may need to turn off some of your appliances for your vehicle to stop overheating. Another reason you could have too much load on your engine is by having too much weight inside.
How To Identify
Now that you understand the most common causes for Cummins 6.7engines overloading, it’s time to discuss how you can identify this problem.
- You have too much stuff in your RV: RV drivers must be mindful of how much weight their vehicle carries. Even though you have a diesel engine, you can only accommodate so much weight in your vehicle. You may need to unload some of your vehicle’s weight, so your engine doesn’t overheat.
- There are too many appliances running in your RV: If you have too many appliances running simultaneously, you’re bound to run into trouble. You might need to run your trial narrator simultaneously with your RV to accommodate these appliances or turn some of your appliances off. Also, pay attention to your power consumption whenever you drive.
Fortunately, identifying an overloading problem on your RV engine is one of the easiest problems to identify. You won’t need to take your vehicle to a professional to resolve this issue.
How To Fix
When you have too much weight or appliances running in your RV simultaneously, it’s easy to cause your engine to overheat. Follow the guidelines below to resolve this overheating problem so you can drive comfortably on the road.
- Remove any excess weight from your vehicle
- Turn off some of your appliances
- Pay attention to what your towing requirements on your vehicle
- Try staying well under the weight limit
If you’re 6.7 engine is overheating due to overloading, you need to pull over and remove some items from your vehicle. Driving with too much weight inside your vehicle will cause several issues when you exceed the weight limit. However, if you’re under the weight limit of your engine, there could be something else wrong with your vehicle.
2. Low Coolant
Another reason people struggle with overheating on their common 6.7 engine is low coolant levels. Unfortunately, many people forget to check their coolant because it doesn’t need as many replacements as their engine oil. However, your coolant plays a crucial role in your engine’s system if you want to avoid overheating.
If you have too little coolant, or if your coolant is old, it’s easy for your engine to overheat and not work properly. The fluids in your engine greatly affect how well your engine functions while you drive. Refusing to maintain your engine fluids will cause all sorts of issues on a long-term and short-term basis.
How To Identify
If you suspect there’s something wrong with your coolant; you need to open the hood and check inside. Checking your coolant levels is the only way to identify and resolve this problem so that you can drive safely on the road.
- Open the hood of your RV
- Find the coolant reservoir on your 6.7 engine
- Open the cap of your engine
- See if your coolant falls below the minimum line
- Top off your coolant if it runs below the line
You can also identify a coolant problem by checking your dashboard periodically. Your RV dashboard will usually indicate when there’s something wrong with your engine. Many people forget to top off their coolant because they don’t need to do it as often as an oil change.
The easiest way to pay attention to your coolant levels is to check them every time you change your oil. Even though most people only need to replace their coolant once every two years, checking during your oil changes will help you stay on top of your maintenance.
How To Fix
You can either fix your RV coolant independently or visit a mechanic. Fortunately, flushing out and replacing your RV coolant is an easy process that only takes a few minutes. In addition, most mechanics don’t charge outrageous fees to change your coolant on a 6.7 Cummins engine.
The easiest way to fix this problem is to keep the coolant in your RV. Keeping a backup supply of coolant is a great way to maintain your RV when you don’t have access to a professional or a pit stop. In addition, you don’t want to get stuck in the wilderness during your road trip, so always keep the necessary materials in your RV.
3. Bad Cooling Fan
When there’s something wrong with the cooling fan on your engine, you could encounter all sorts of problems with overheating. There’s no way for your RV and Gen to cool down if your cooling fan stops working sufficiently. This can happen when your motor stops working, or something blocks the fan from operating.
When your engine overheats, your dashboard will usually indicate a problem. You can visit most automobile shops for a free diagnosis if you’re unsure of the issue. You can also pop open the d to check if your engine is overheating.
Whenever you open the hood of an overheating engine, you must execute caution. Engine overheating is dangerous and can lead to injury if you’re not cautious. Therefore, turning your engine off for a few minutes would be best before opening the hood.
How To Fix
Fortunately, a bad cooling fan is an easy component of your engine to fix. Follow the steps below to fix your cooling fan.
- Use pressurized air on the fan to clear out any dust or debris. There’s likely something blocking your fan and causing it to stop working.
- Purchase a new fan motor from an automobile shop or visit a mechanic for them to install it. Visiting a mechanic specializing in diesel engines is the best way to keep yourself and your vehicle safe from further harm. A mechanic will be familiar with your 6.7 Cummins engine and will repair your cooling fan for a low cost.
If you still have problems with your 6.7 Cummins engine overheating, you may need to replace the engine entirely. Unfortunately, even though engines are known to last a while, they don’t last forever. If your engine is at the end of its lifespan, there’s only so much you can do to resolve the overheating problem.
When To Call a Professional
If you’ve tried all of our troubleshooting resolutions on your overheating 6.7 Cummins engine, you should visit a professional for further assistance. Vehicle mechanics can work on your diesel engine and get it back to normal, so you can safely drive on the road. The following are signs that you should visit a mechanic for assistance with your diesel engine.
- you’ve never worked on a diesel engine before
- You’ve tried all our troubleshooting methods
- You’re not sure why your engine is overheating at
- You have trouble working on your RV engine at
- There are multiple things wrong with your engine
Unfortunately, if multiple things are wrong with your engine, it would be best to visit a professional for assistance. They can diagnose multiple problems and resolve all of them in one stop.
Final Thoughts
Even though the common 6.7 diesel engine is a popular option among RV drivers, you need to resolve things that can go wrong. It’s unsafe to drive your vehicle during the engine overheats, so you should pull over and fix the situation to preserve the quality of your vehicle. If you continue to drive with an overheating engine, you can permanently damage your RV.
