🔧 Engine Mounts - Replacement

Replacing the engine mounts on your F-350 means safely supporting the engine, removing the old rubber mounts, and installing new ones to control engine movement and vibration. Worn mounts can cause clunks on acceleration/braking, vibration in the cab, and exhaust/hoses contacting nearby parts.

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

Assumption: Factory-style left/right hydraulic/rubber mounts, no lift kit or custom brackets.

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⚠️ Safety & Precautions

• ⚠️ Support the engine from underneath before loosening mount hardware; the engine can shift suddenly.
• ⚠️ Never get under the truck supported only by a jack; use jack stands rated for the truck.
• ⚠️ Keep hands clear between the mount and bracket while lifting the engine.
• ⚠️ Watch the radiator fan shroud, hoses, and wiring while raising the engine; stop if anything binds.
• ⚠️ Let the exhaust cool fully; the manifolds/downpipes can burn you.
• 🔋 Battery disconnect is recommended if you’ll be working near the starter/positive cable.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 4-ton minimum)
• Jack stands (rated 6-ton pair minimum)
• Wheel chocks
• Safety glasses
• Mechanic gloves
• Work light
• Wood block 2x6 in, 18-24 in long
• Socket set 10mm-24mm
• Deep socket set 10mm-24mm
• Wrench set 10mm-24mm
• 1/2-inch drive breaker bar
• 1/2-inch drive torque wrench (30-250 ft-lbs range)
• 3/8-inch drive ratchet
• Extensions 3-inch, 6-inch, 12-inch
• Universal joint adapter
• Pry bar 18-inch
• Trim clip remover
• Penetrating oil
• Paint marker

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Engine mount (left) - Qty: 1
• Engine mount (right) - Qty: 1
• Engine mount hardware kit - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground, set the parking brake, and chock the rear wheels.
• 🛠️ If equipped with a lower splash shield/skid plate, plan to remove it for access.
• 🔋 Disconnect the negative battery cable using a 10mm socket.
• 📏 Put a wood block on the floor jack saddle; this spreads load and protects the oil pan. (An engine “oil pan” is the metal sump at the bottom of the engine.)

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and support the truck

• Use a floor jack (rated 4-ton minimum) to lift the front of the truck at the front jacking point.
• Place jack stands (rated 6-ton pair minimum) under the frame rails and lower the truck onto them.
• Shake the truck slightly to confirm it’s stable before crawling underneath.

Step 2: Remove shields for access (if equipped)

• Use a socket set 10mm-15mm to remove any lower splash shield/skid plate bolts.
• Use a trim clip remover for plastic push-clips (a push-clip is a plastic fastener that pops out).
• Set all hardware aside and label it with a paint marker.

Step 3: Support the engine

• Position the floor jack under the engine with the wood block between the jack and the oil pan.
• Pump the jack up until it just contacts and lightly supports the engine (do not lift yet).
• Tip: Lift only as much as needed.

Step 4: Locate both engine mounts

• Use a work light to find the mounts on both sides: each mount sits between the frame perch and the engine bracket.
• Spray mount fasteners with penetrating oil and wait a few minutes.

Step 5: Loosen (do not remove) mount-to-frame hardware

• Use a breaker bar and the appropriate deep socket set 15mm-24mm to loosen the mount-to-frame nuts/bolts.
• Leave the hardware threaded on a few turns so the engine can’t jump.
• Torque to Ford specification for your fastener set during reassembly. Exact torque varies by mount/hardware revision.

Step 6: Loosen (do not remove) mount-to-engine bracket hardware

• Use a ratchet, extensions 6-inch/12-inch, and a universal joint adapter as needed to reach the mount-to-engine bracket bolts/nuts.
• Use the appropriate socket set 15mm-24mm or wrench set 15mm-24mm to loosen them.
• Torque to Ford specification for your fastener set during reassembly. Exact torque varies by mount/hardware revision.

Step 7: Lift the engine slightly to unload the mounts

• Use the floor jack to raise the engine slowly, typically 1/4 to 1 inch, just until you see the mount separate slightly from its perch.
• Watch the fan shroud, upper radiator hose, intake ducting, and wiring while lifting.
• If anything stretches or contacts hard, lower the engine and reposition.

Step 8: Remove one mount at a time (recommended)

• Pick one side to start (driver or passenger).
• Use a ratchet and correct socket to fully remove the mount-to-frame hardware.
• Use a ratchet, extensions, and correct socket to fully remove the mount-to-engine bracket hardware.
• Use a pry bar 18-inch to gently shift the mount free if it’s stuck.

Step 9: Compare old vs new mount

• Place the old and new mounts side-by-side and verify the locating pins/holes and bolt pattern match.
• Use a paint marker to mark orientation if the mount is directional.

Step 10: Install the new mount loosely

• Position the new mount into place by hand.
• Start the mount-to-engine bracket bolts/nuts by hand first (a “hand start” prevents cross-threading).
• Start the mount-to-frame bolts/nuts by hand next.
• Use a ratchet only to snug them; do not final-torque yet.

Step 11: Repeat for the other side

• Use the same process with the ratchet, extensions, and socket set to remove and replace the second mount.
• Use the floor jack to adjust engine height as needed so bolt holes align.
• Tip: Small jack moves help alignment.

Step 12: Set the engine back onto the mounts

• Slowly lower the engine using the floor jack until the mounts are fully seated.
• Confirm the mount studs/bolts sit centered in the frame perches.

Step 13: Final-tighten and torque all mount fasteners

• Use a torque wrench (30-250 ft-lbs range) with the correct socket to torque mount-to-engine bracket fasteners.
• Use the torque wrench with the correct deep socket to torque mount-to-frame fasteners.
• Torque to factory spec (Ford service information) for your exact fasteners.

Step 14: Reinstall shields and lower the truck

• Use the socket set 10mm-15mm and trim clip remover to reinstall the splash shield/skid plate.
• Use the floor jack to lift slightly, remove the jack stands, then lower the truck.

Step 15: Reconnect the battery

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

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✅ After Repair

• 🔍 Start the engine and let it idle; listen for new clunks or knocking.
• 🧪 With the brake firmly held, shift from Park to Reverse to Drive; the engine should not lurch excessively.
• 🛣️ Test drive and re-check for vibration under acceleration and on decel.
• 🔧 After the test drive, re-check mount fasteners for tightness with a torque wrench.

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💰 DIY vs Shop Cost

Shop Cost: $700-$1,400 (parts + labor)

DIY Cost: $200-$500 (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 3-5 hours.

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🎯 Ready to get started?

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