How to Spot a Lemon When Buying a Used RAM Cummins

Bryan Warman • Jan 18, 2023

If you’re in the market for a used RAM Cummins , there are a few things you should keep an eye out for. Some Cummins trucks may have been driven hard and not properly maintained, so it’s important to know what to look for to keep from investing in the wrong truck. Here are 5 warning signs that a Cummins truck may be in bad shape.

Check out the engine and radiator

When buying a used truck , it is important to check the engine and radiator before making a purchase. The engine is the most important part of the truck, and the cooling system is essential for keeping the engine from overheating .

During a pre-purchase inspection , our qualified mechanics will identify any potential problems with the engine or cooling system and advise you on whether or not the truck is a good purchase. By having the engine and cooling system checked before you buy a pre-owned Cummins, you can avoid costly repairs down the road.

Check out the exhaust pipe and smoke

The exhaust from the truck is an important indication of whether or not it’s running smoothly. If you see dark black smoke , there may be a problem with the higher air-to-fuel ratio (which affects how fast air flows through cylinders). This can point to an engine problem.

Also, since diesel engines are different from gasoline , they burn fuel differently. If there is a lot of buildup on the exhaust pipe, the engine may not be performing properly. This can be an indication that the previous owner didn’t take care of the truck as well as they could have, and you may want to pass.

Check the handling

The suspension is one of the most important systems on a vehicle. It includes the shocks , struts , and springs , and it helps to absorb bumps and vibrations from the road. Over time, suspension components can wear out, causing the ride to be less smooth and comfortable. In addition, worn suspension components can lead to premature tire wear and even increased fuel consumption .

Look for leaks

Another sign that a Cummins truck may be in bad shape is if there are leaks. Oil leaks , for example, can be a sign of serious engine or transmission problems. If you see any leaks, make sure to have the truck inspected by a qualified mechanic before making a purchase.

Check the odometer

Be sure to check the odometer to see how many miles the truck has been driven. If the truck has excessive mileage , it’s likely that it will need more repairs and maintenance. You can also ask for a history of service to see if the truck has been well-maintained.

Keep an eye out for poor tire condition

The condition of the tires can also be a sign of how well the truck has been maintained. If the tires are bald or have excessive wear, you may want to pass on the purchase. If they haven’t changed the tires, which is part of responsible ownership, they may have let other services go long such as oil changes , etc.

Strange noises

If you hear strange noises coming from the truck, it’s best to have it checked out by a mechanic. These noises could be a sign of serious problems from the engine, transmission, brakes , suspension or any combination of these important and expensive systems.

Excessive rust or corrosion

Look for excessive rust or corrosion on the body of the truck and underneath. This can be a sign that the RAM hasn’t been well-maintained and may have other issues as well. If you see excessive rust or corrosion, it’s best to move on to another RAM Cummins.

Have a Pre-Purchase Inspection Done at Diesel Pickup Pros



It is always advisable to have a pre-purchase inspection carried out by our qualified mechanics at Diesel Pickup Pros before committing to a used truck. By doing so, you can be sure that you are getting your money’s worth and that it’s in good condition and will provide a smooth ride for many years to come. We proudly service clients in Floyds Knobs , Georgetown , Jeffersonville , New Albany , IN and in Louisville KY . Stop by today or give us a call to schedule a pre-purchase inspection.

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