If you drive a pickup truck with a 6.7-liter diesel engine, you understand its advantages. However, recent news items and customer repairs in our service center have shown us that there are some special care items to keep an eye on.

RAM Recall:

This recall was limited to pickup trucks with a 6.7-liter engine. The recall impacts RAM trucks from model years 2013 to 2017. The effected models are 2500 and 3500 pickups; as well as, 3500, 4500, and 5500 chassis cabs. However, the water pumps are no longer used, according to the statement.

The recall was initiated based on customer complaints that the water pumps in these engines were overheating and causing engine compartment fires. The fire’s scope could be anything from an odor of something burning to an open flame. There were a number of incidents that were reported, some of which reported damage. However, in all reports, the damage did not extend beyond the water pump, according to the statement. This only occurs in certain conditions, but the statement from Fiat Chrysler (the company that manufactures RAM trucks) did not elaborate on what those conditions were.

The parts that are needed to fix the water pump issue are not available in the quantity needed. Nearly 450,000 RAM trucks have been recalled. Once parts are available, RAM will send out notices to the effected customers. If the water-pump is not functioning as it should, it may activate a warning light. If you spot a warning light, you are advised to bring your vehicle into be serviced as soon as possible. 

If you smell burning, pull over (if driving), turn off your vehicle immediately and have it towed to be serviced. If you can see flames coming from your engine, get everyone out of the vehicle and to a safe distance. THEN CALL 911! WE DO NOT ADVISE ATTEMPTING TO PUT OUT A VEHICLE FIRE WITHOUT PROPER TRAINING!

Over Fueling:

What is over fueling? You may think that it’s when you add extra fuel after the pump stops when you’re filling up your tank. Though this can also lead to engine damage, lost fuel economy, and added air pollution, it’s not the issue that we noticed occurring in 6.7-liter engines. Over fueling is when the fuel pump is pumping too much diesel into the engine cylinders. The diesel in the cylinder is not burned efficiently, because the fuel to air mixture is not at the appropriate proportion. Though this occurrence is rare, it can cause cylinder heads to crack or cause damage to the pistons. See the pictures below for examples of an extreme case of over fueling damage.

There are a lot of causes of over fueling; such as, a faulty air meter, a defective fuel injector, an air leak, or other components in the engine malfunctioning and creating a domino effect. Over fueling can also be caused when the injection timing is set incorrectly and the fuel injection happens too late in the piston pressure stroke. If you notice that the truck feels like it’s hesitating, not accelerating like it used to, or you don’t have the same level of power, the engine could be over fuelingYou may also notice an excessive amount of black smoke coming from the exhaust. You may not be able to tell a difference if you have altered or removed your emissions system, because your exhaust will already contain large amounts of black smoke. (Note: This may be illegal. Please consult local laws/ordinances before altering your emissions system.) 

If you notice that your engine is not operating normally, an excessive amount of black smoke in your exhaust, or a warning light illuminated, have your truck serviced as soon as possible.


Written by:

Beckie Bean

Digital Content Manager

September 30, 2017

Sources: Fortune, USA Today, 4x4 Community

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