2018 Ford F250 Engine 6.7 L V8 Diesel Specs – Performance

ByRobert Lozano

The 2018 Ford F-250 powered by the 6.7L Power Stroke V8 diesel engine is a masterclass in heavy-duty engineering, offering 450 horsepower and 935 lb-ft of torque. This guide provides a comprehensive breakdown of technical specifications, fluid capacities, and expert maintenance advice to keep your Super Duty running at peak performance.

If you own a Super Duty, you know that the heart of the beast is its powertrain. Whether you are hauling a 15,000-pound trailer through the Rockies or building a dedicated off-road rig, understanding the 2018 ford f250 engine 6.7 l v8 diesel specs is essential for long-term reliability.

You want a truck that doesn’t just work hard but lasts for hundreds of thousands of miles without catastrophic failure. In this article, I will promise to break down every technical detail and maintenance requirement you need to know. We will preview the internal components, the common failure points like the CP4 pump, and the exact tools you need for a Saturday morning oil change.

The Powerhouse Performance: Output and Capability

The 2018 model year represented a significant sweet spot for the 6.7L Power Stroke. By this time, Ford had refined the second-generation “Scorpion” engine architecture to deliver massive low-end grunt. The 450 horsepower peak arrives at 2,800 RPM, but the torque is the real story here.

With 935 lb-ft of torque available at just 1,800 RPM, the F-250 can move massive loads with minimal effort. This engine uses a Bosch high-pressure common-rail fuel system that operates at pressures up to 30,000 psi. This high pressure ensures better atomization of the diesel fuel, leading to cleaner combustion and more power.

For the off-roader, this means you have immediate throttle response when climbing steep grades or navigating deep mud. The engine’s Variable Geometry Turbocharger (VGT) adjusts its internal vanes to provide boost across the entire power band, virtually eliminating the “turbo lag” common in older diesel engines.

2018 ford f250 engine 6.7 l v8 diesel specs: A Detailed Breakdown

To truly understand your truck, you need to look at the raw data that defines its capability. Below is the technical profile for the 2018 6.7L Power Stroke V8.

  • Engine Configuration: 90-degree V8, Overhead Valve (OHV).
  • Displacement: 6.7 Liters (406 cubic inches).
  • Bore x Stroke: 3.90 inches x 4.25 inches.
  • Compression Ratio: 16.2:1.
  • Block Material: Compacted Graphite Iron (CGI).
  • Cylinder Head Material: Aluminum with 4 valves per cylinder.
  • Firing Order: 1-3-7-2-6-5-4-8.
  • Turbocharger: Single GT37 Variable Geometry Turbo (VGT).

One of the most unique 2018 ford f250 engine 6.7 l v8 diesel specs is the use of a Compacted Graphite Iron (CGI) engine block. CGI is significantly stronger and lighter than traditional grey cast iron. This allows the engine to handle the immense internal pressures of a high-torque diesel without adding excessive weight to the front axle.

The “Reverse Flow” layout is another engineering marvel. Unlike traditional V8s, the exhaust manifolds are located in the “valley” of the engine, while the intake is on the outside. This design places the turbocharger in the center of the engine, significantly shortening the path for exhaust gases and improving thermal efficiency.

Valvetrain and Oil System

The valvetrain uses a traditional pushrod design, but with a twist. Each cylinder has four valves, totaling 32 valves for the engine. This allows for better breathing at higher RPMs. The oil system is equally robust, featuring a high-capacity pump to lubricate the turbocharger and the piston cooling jets that spray oil on the underside of the pistons to manage heat.

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Essential Maintenance: Fluids, Filters, and Capacities

Maintaining a 6.7L Power Stroke is not like maintaining a gas-powered F-150. Everything is bigger, heavier, and more expensive. However, if you follow a strict maintenance schedule, these engines can easily cross the 300,000-mile mark. Knowing the 2018 ford f250 engine 6.7 l v8 diesel specs regarding fluid types is non-negotiable.

For an oil change, you will need 13 quarts of 10W-30 or 5W-40 oil. I highly recommend using a full synthetic 5W-40 if you tow frequently or live in a climate with extreme temperature swings. Synthetic oil provides better protection for the turbocharger bearings, which can reach incredibly high temperatures during a heavy haul.

The fuel system requires two different filters: one under the hood and one on the frame rail. These should be changed every 15,000 to 22,500 miles. Always use Motorcraft filters. Aftermarket filters often lack the proper water-separating capabilities, and water is the absolute enemy of the high-pressure fuel pump.

The Dual Cooling System

The 2018 F-250 uses a unique dual-loop cooling system. The primary loop cools the engine block and cylinder heads. The secondary loop (or low-temp loop) cools the Charge Air Cooler (CAC), the transmission oil cooler, and the fuel cooler. This ensures that the air entering the engine is as dense and cool as possible, maximizing power.

  1. Primary Coolant Capacity: Approximately 28.2 quarts.
  2. Secondary Coolant Capacity: Approximately 11.7 quarts.
  3. Coolant Type: Motorcraft Orange (Note: Ford has since superseded this with Motorcraft Yellow; check your VIN).

Common Problems and Troubleshooting for the 6.7L Power Stroke

Even with impressive 2018 ford f250 engine 6.7 l v8 diesel specs, no engine is perfect. As a DIYer, you should keep an eye on a few specific areas. The most discussed issue is the Bosch CP4.2 high-pressure fuel pump. This pump relies on diesel fuel for lubrication. If you get a bad batch of “dry” fuel or water in the system, the pump can fail internally, sending metal shards through the entire fuel system.

To prevent this, many owners install a “disaster prevention kit.” This kit reroutes the fuel so that if the pump fails, the debris is sent back to the tank and through the filters rather than into the expensive fuel injectors. It is a relatively inexpensive insurance policy for a $10,000 repair bill.

Another common issue involves the EGR (Exhaust Gas Recirculation) cooler. Over time, soot can clog the cooler, leading to “EGR Flow” fault codes and reduced performance. If you notice your coolant levels dropping slightly without a visible leak, the EGR cooler might be leaking internally. This is a job best handled by a professional if you aren’t comfortable tearing down the top end of the engine.

EGT Sensor Failures

The 2018 F-250 is equipped with several Exhaust Gas Temperature (EGT) sensors. If one of these sensors fails, it can put the truck into “Limp Mode,” limiting your speed to 50 mph or less. I always recommend carrying a spare EGT sensor and a 13mm flare nut wrench in your glove box. It is a 10-minute fix that can save you a massive towing bill in the middle of nowhere.

Off-Roading and Heavy Towing Considerations

If you are using your F-250 for off-roading or overlanding, the 2018 ford f250 engine 6.7 l v8 diesel specs provide a great foundation. However, the weight of the diesel engine (nearly 1,000 lbs) means you need a suspension system that can handle the load. When choosing a leveling kit or lift, ensure the coil springs are rated for the heavy Power Stroke V8.

For those who tow, the integrated Engine Exhaust Brake is your best friend. By pressing the button on the dash, the VGT turbo vanes close down to create backpressure, slowing the truck down without wearing out your service brakes. This is critical for safety when descending long grades with a heavy fifth-wheel trailer.

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Always monitor your DEF (Diesel Exhaust Fluid) levels. The 2018 F-250 has a 7.5-gallon DEF tank. If you run out of DEF, the truck will eventually limit your speed to 5 mph. Most truck stops have DEF at the pump, which is much cheaper and fresher than the boxed stuff you find at auto parts stores.

Essential Tools for the 6.7L DIY Mechanic

Working on a modern diesel requires a few specialized tools. If you plan on doing your own maintenance to save money and ensure the job is done right, here is what you should have in your toolbox:

  • 36mm Socket: Essential for removing the oil filter cap and the upper fuel filter housing.
  • Torque Wrench: Many components on the 6.7L, like the oil drain plug (20-25 lb-ft), require specific torque specs.
  • OBD-II Scanner: A tool like FORScan or a dedicated diesel monitor (Edge Insight) allows you to see real-time data like EGTs, DPF soot load, and boost levels.
  • Large Oil Drain Pan: Remember, you are draining 13 quarts at once. A standard 5-quart pan will cause a massive mess.
  • Fuel Filter Wrench: A strap wrench or a dedicated socket for the lower frame-mounted filter.

When working under the truck, always use heavy-duty jack stands. An F-250 can weigh over 8,000 lbs, and a standard floor jack is not enough to safely support the vehicle while you are underneath it. Safety is always the priority when performing DIY maintenance.

Frequently Asked Questions About 2018 ford f250 engine 6.7 l v8 diesel specs

What is the oil capacity for a 2018 F-250 6.7L Diesel?

The oil capacity is exactly 13 quarts (12.3 liters) including the filter. It is recommended to use Motorcraft FL-2051S filters and 10W-30 or 5W-40 oil depending on your operating temperature.

How much can a 2018 F-250 6.7L Diesel tow?

When properly equipped, a 2018 F-250 with the 6.7L Power Stroke can tow up to 15,000 lbs with a conventional hitch and up to 18,500 lbs with a 5th-wheel or gooseneck setup. Always check your specific door jamb sticker for your truck’s exact ratings.

Does the 2018 6.7L Power Stroke have a CP4 pump?

Yes, the 2018 model uses the Bosch CP4.2 high-pressure fuel pump. While Ford has made improvements to the system, it is still sensitive to fuel contamination. Using a fuel additive like Stanadyne or Hot Shot’s Secret can help provide extra lubrication.

What is the horsepower and torque of the 2018 6.7L?

The factory 2018 ford f250 engine 6.7 l v8 diesel specs state the engine produces 450 horsepower and 935 lb-ft of torque. These figures made it one of the most powerful trucks in its class at the time of release.

Final Thoughts for the Super Duty Owner

The 2018 Ford F-250 is a remarkable machine that bridges the gap between a work truck and a luxury cruiser. By understanding the 2018 ford f250 engine 6.7 l v8 diesel specs, you are better equipped to handle maintenance, anticipate repairs, and enjoy the full capability of your vehicle.

Whether you are a weekend warrior towing a boat to the lake or a dedicated DIYer keeping your truck in showroom condition, consistency is key. Use high-quality fluids, change your filters on time, and listen to what your truck is telling you. A well-maintained 6.7L Power Stroke is a partner that will never let you down.

Stay safe on the road, keep those EGTs in check, and enjoy the incredible power of your V8 diesel. Happy wrenching!

Robert Lozano
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