Business
How Do You Mount a 03–20 CR Cummins in an 08–15 Ford Super Duty Truck?
- by Kevin Smith
Swapping a Cummins engine into a Ford Super Duty has become a dream project for many diesel enthusiasts. The reliability and torque of a CR (Common Rail) Cummins engine from 2003–2020, combined with the rugged design of a 2008–2015 Ford F250–F550, offers a winning combination of power, durability, and drivability. However, the big question remains: How do you properly mount a 03–20 CR Cummins into an 08–15 Ford? The answer lies in high-quality, purpose-built motor mounts.
Let’s walk through everything you need to know—from why the swap is popular to how these specially designed mounts make it possible.
Why Swap a Cummins into a Ford?
Ford trucks, especially the Super Duty lineup from 2008 to 2015, are known for their solid frames, advanced suspension systems, and creature comforts. However, some owners experience issues with the stock Powerstroke engines, particularly in terms of longevity or tunability. That’s where the CR Cummins engine shines.
Cummins engines, particularly the 5.9L and 6.7L CR variants from 2003–2020, have built a legendary reputation for reliability, simplicity, and raw torque. Whether you want to haul heavy loads, conquer off-road terrain, or just enjoy diesel performance, a Cummins swap makes sense.
But it all starts with getting the engine to sit properly in the truck—securely and without clearance or fitment headaches.
The Motor Mount Challenge
Mounting a Cummins engine into a Ford chassis isn’t a simple bolt-in job unless you have the right components. The biggest issue? The two platforms weren’t built to accommodate each other, meaning custom motor mounts are essential.
Many DIY builders attempt to fabricate their mounts, but this can lead to problems such as:
- Misaligned driveline components
- Inadequate engine clearance
- Stress on the frame or firewall
- Difficulty fitting fans or accessories
- Needing to relocate the ECU
That’s why using precision-engineered motor mounts designed specifically for this swap is critical to success.
Purpose-Built Motor Mounts for the Job
The 08–15 Ford Motor Mounts to 03–20 CR Cummins are specially designed to simplify and streamline the swap process. Here’s why these mounts stand out and why they’re the top choice for anyone serious about doing the swap right:
1. Laser-Cut and Robotically Welded for Precision
These mounts are CNC laser cut from 3/8” steel and robotically welded. That means they’re not only strong enough to handle Cummins-level torque, but they also offer factory-quality consistency and fitment.
2. Fits Ford’s Factory Frame-Mounted Isolators
Instead of requiring custom fabrication or off-centre positioning, these mounts use your factory Ford isolators. That means your engine sits exactly where it should, aligning with your transmission, driveshaft, and other critical systems.
3. Slides Engine and Transmission Back 2.5 Inches
To accommodate a mechanical fan and ensure proper clearance in the engine bay, these mounts move the engine and transmission back 2.5 inches. This simple but critical adjustment prevents future headaches with radiator clearance and cooling efficiency.
4. No ECU Relocation Required
One of the biggest pain points in most Cummins engine conversions is dealing with the Cummins ECU. With many setups, the ECU needs to be moved, rewired, or even modified. These mounts are cleverly designed to eliminate that need altogether, keeping your ECU in place and simplifying your wiring job.
5. Includes All Necessary Hardware
You don’t need to worry about sourcing bolts or brackets from multiple suppliers. These mounts include everything you need—both left and right motor mounts and all the required hardware for a complete installation.
How the Installation Process Works
Mounting the Cummins engine using these mounts is surprisingly straightforward compared to traditional swap jobs. Here’s a general breakdown of the process:
- Prepare Your Chassis
- Remove the factory Powerstroke engine and motor mounts.
- Clean and inspect the frame rails for damage or debris.
- Install the Motor Mounts
- Bolt the new mounts to the factory Ford frame isolators.
- Ensure proper alignment and torque all hardware to spec.
- Position the Engine
- Lower the 03–20 CR Cummins engine into the bay.
- Align the engine with the transmission and mounts.
- Bolt the engine securely to the new mounts.
- Double Check Fitment
- Verify clearance around the fan, firewall, and steering components.
- Ensure no interference with the AC compressor or power steering pump if applicable.
- Complete the Swap
- Connect wiring, fuel, exhaust, and cooling systems.
- Test for vibrations, misalignment, or clearance issues before your first drive.
Final Thoughts
If you’re planning a Cummins swap into a 2008–2015 Ford Super Duty, the right motor mounts make all the difference. These laser-cut, robot-welded mounts offer OEM-level fitment, reduce fabrication time, and keep your build cleaner and more reliable.
By using factory Ford isolators and eliminating the need for ECU relocation, they help turn a complex job into a manageable project for builders of all skill levels. Whether you’re towing, racing, or daily driving, starting your build with the right motor mounts ensures long-term success.









