🔧 F-250 Super Duty - Engine Mount Replacement

Worn engine mounts let the engine shift too much, which can cause clunks on acceleration/braking, vibration, and stress on exhaust and hoses. On your F-250, you’ll support the engine, remove one mount at a time, and install the new mounts without letting the engine drop or shift.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

Assumption: replacing both left and right engine mounts.

---

⚠️ Safety & Precautions

• ⚠️ Work on a level surface and chock the rear wheels.
• ⚠️ Support the truck with jack stands; never rely on a jack alone.
• ⚠️ Support the engine before loosening mount hardware; the engine can drop suddenly.
• ⚠️ Keep hands clear between the engine and frame while lifting.
• ⚠️ Let the exhaust cool fully; mounts sit near hot components.
• ⚠️ Battery disconnect is recommended to prevent accidental cranking.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• Wheel chocks
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wood block (2x6 or 2x8)
• Socket set 10mm-24mm
• Deep socket set 10mm-24mm
• Wrench set 10mm-24mm
• Breaker bar 1/2"
• Torque wrench 20-250 ft-lbs
• Long extensions 1/2"
• Universal joint adapter 1/2"
• Pry bar 18"
• Trim clip removal tool
• Flathead screwdriver
• Work light
• Penetrating oil

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Left engine mount - Qty: 1
• Right engine mount - Qty: 1
• Engine mount hardware kit - Qty: 1
• Threadlocker (medium strength) - Qty: 1

---

📋 Before You Begin

• 🅿️ Park on level ground, shift to P, and set the parking brake.
• 🧱 Place wheel chocks behind the rear tires.
• 🔋 Disconnect the battery negative cable using a 10mm socket.
• 🛻 Raise the front and support the frame with jack stands using a floor jack.
• 🪵 Prepare a wood block to go between the jack and the oil pan; this spreads the load so you don’t dent the pan.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove lower splash shields (if equipped)

• Use a trim clip removal tool and flathead screwdriver to remove any push-pins/screws holding the lower shield.
• Use a socket set 10mm-13mm for any bolts you find.

Step 2: Support the engine

• Place the floor jack under the engine oil pan area with the wood block on the jack pad.
• Jack up gently until the wood just contacts and slightly supports the engine.
• Lift only enough to take mount load.

Step 3: Soak mount fasteners

• Spray penetrating oil on the engine mount nuts/bolts on both sides.
• Wait 5-10 minutes to reduce the chance of broken studs.

Step 4: Replace the first engine mount (one side at a time)

• Choose one side to start (driver or passenger) and do not loosen the other mount fully yet.
• From below, use a socket set, long extensions, and a universal joint adapter to access the mount-to-frame fasteners.
• Use a breaker bar 1/2" as needed to crack fasteners loose.
• Remove the mount through-bolt/nut set using the appropriate socket and wrench.
• Remove the mount fasteners at the engine bracket using the appropriate socket and wrench.
• If the mount is trapped, raise the engine slightly with the floor jack and use a pry bar 18" to shift the mount out.
• Move hoses/wires gently; don’t stretch them.

Step 5: Install the new mount on that side

• Position the new mount in place by hand.
• Start all bolts/nuts by hand first to avoid cross-threading.
• Apply threadlocker (medium strength) if your replacement hardware instructions call for it.
• Lower/raise the engine slightly with the floor jack until the through-bolt aligns cleanly.
• Install the through-bolt and nut using the correct socket and wrench.
• Tighten all fasteners with a torque wrench 20-250 ft-lbs to Ford factory specifications for your exact fasteners.

Step 6: Repeat for the other engine mount

• Move to the other side and repeat Step 4 and Step 5 using the same socket set, extensions, universal joint adapter, breaker bar, and torque wrench.
• Only lift the engine as much as needed for alignment.

Step 7: Reinstall shields and lower the truck

• Reinstall any splash shields using the socket set 10mm-13mm and trim clip removal tool.
• Remove the engine support by lowering the floor jack slowly.
• Raise slightly with the floor jack, remove the jack stands, then lower the truck fully.

Step 8: Reconnect the battery

• Reconnect the battery negative cable using a 10mm socket.

---

✅ After Repair

• 🔎 Start the engine and watch for excessive movement while shifting from P to R to D with your foot on the brake.
• 🧰 Listen for new clunks, tapping, or exhaust contact at idle and during a short test drive.
• 🧪 Recheck all visible fasteners for tightness and inspect nearby hoses/wiring for rubbing.
• 🛠️ If you feel vibration at idle, verify both mounts are seated flat and hardware is torqued to Ford factory specifications.

---

💰 DIY vs Shop Cost

Shop Cost: $700-$1,500 (parts + labor)

DIY Cost: $200-$600 (parts only)

You Save: $500-$900 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-6 hours.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.