This procedure covers removal and replacement of the front engine mount on a 2015-2020 Ford F-150 with the 3.5L EcoBoost V6 engine, requiring support of the engine from below during the replacement.

Warnings

Tools required

Parts

• Front engine mount × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool completely if recently operated
3. Disconnect negative battery cable to prevent electrical issues
4. Raise front of vehicle and secure on jack stands at manufacturer-specified lift points
5. Remove engine skid plate or belly pan if equipped

Procedure

1. 1

   Position floor jack under engine
   Place a floor jack with a wood block on top under the engine oil pan, positioned slightly forward of center. The wood block distributes load and prevents damage to the oil pan. Raise jack until it just makes contact but is not supporting weight yet.
2. 2

   Identify front engine mount location
   Locate the front engine mount on the driver side of the engine block. The mount consists of a rubber isolator assembly bolted to the engine block on top and to the subframe/crossmember below, with a through-bolt connecting the two halves.
3. 3

   Remove mount through-bolt
   Using a socket and ratchet, remove the large through-bolt that passes horizontally through the center of the engine mount assembly. This bolt connects the upper and lower mount brackets. You may need to use a breaker bar if the bolt is tight. Support the bolt as you remove it completely.
4. 4

   Raise engine slightly
   Carefully raise the floor jack to lift the engine approximately 1-2 inches. This relieves tension on the mount and creates clearance for removal. Monitor engine position and stop if you encounter significant resistance or if engine reaches upper limits of movement.
5. 5

   Remove upper mount-to-engine bolts
   Remove the bolts securing the upper portion of the engine mount to the engine block. There are typically 2-3 bolts accessible from above or through the wheel well area. Use extensions as needed to access bolts in tight spaces.
   Torque spec

   Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
6. 6

   Remove lower mount-to-frame bolts
   Working from below the vehicle, remove the bolts securing the lower portion of the engine mount to the subframe or crossmember. These are typically 2-4 bolts depending on mount design. Keep track of any spacers or washers.
   Torque spec

   Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
7. 7

   Remove old engine mount
   With all fasteners removed, carefully remove the engine mount assembly. You may need to maneuver it around other components or use a pry bar gently to break it free from mounting surfaces. Inspect the old mount for signs of oil contamination, cracking, or separation of rubber from metal.
8. 8

   Clean mounting surfaces
   Use a wire brush to clean the mounting surfaces on both the engine block and subframe where the new mount will install. Remove any corrosion, dirt, or old thread locker. Inspect mounting holes and threads for damage.
9. 9

   Install new engine mount
   Position the new engine mount assembly, aligning the lower portion with the subframe mounting holes first. Install lower mount-to-frame bolts finger-tight. Then align upper portion with engine block and install those bolts finger-tight. Do not fully tighten yet.
   Torque spec

   Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)

   Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
10. 10

    Lower engine onto mount
    Slowly lower the floor jack to settle the engine weight onto the new mount. Ensure mount aligns properly and that the through-bolt holes line up between upper and lower mount brackets. Stop lowering when engine is at normal ride height.
11. 11

    Install and torque through-bolt
    Insert the mount through-bolt and install the nut. Using a torque wrench, tighten the through-bolt to specification. This bolt is critical for proper mount function and must be torqued correctly.
12. 12

    Torque mount-to-engine bolts
    Using a torque wrench, tighten the upper mount-to-engine block bolts to the specified torque in a cross-pattern if multiple bolts are present. Ensure bolts are fully seated and torque wrench clicks at proper setting.
    Torque spec

    Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
13. 13

    Torque mount-to-frame bolts
    Torque the lower mount-to-frame bolts to specification. Tighten in a cross-pattern if multiple bolts are present to ensure even loading on the mount.
    Torque spec

    Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
14. 14

    Remove floor jack and verify
    Carefully lower and remove the floor jack from under the engine. Visually inspect the installed mount to ensure it is properly seated, no gaps exist between mounting surfaces, and all fasteners are secure. Check that engine sits level.

Reassembly

1. Reinstall engine skid plate or belly pan if equipped, ensuring all clips and fasteners are secured
2. Lower vehicle from jack stands and remove stands
3. Reconnect negative battery cable
4. Clear any stored diagnostic codes if battery was disconnected for extended period

Verification

• Start engine and observe mount for excessive movement or vibration
• With engine idling, shift transmission through all gears (brake applied) and verify mount does not show signs of failure or excessive engine movement
• Perform a test drive and verify no abnormal engine vibration or clunking noises during acceleration or deceleration
• After test drive, recheck all mount bolts for proper torque and verify no loosening has occurred
• Visually inspect mount for proper alignment and seating with engine at rest

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