Engine Mount - Rear

This procedure covers the removal and replacement of the rear engine mount on a 2011-2014 Ford F-150 with the 5.0L Coyote V8 engine and 4WD.

Warnings

Tools required

Parts

• Rear engine mount assembly × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Allow engine to cool completely if recently operated
3. Disconnect negative battery cable
4. Raise vehicle and secure on jack stands at all four corners for stability
5. Remove any skid plates or crossmembers that obstruct access to rear engine mount

Procedure

1. 1

   Support the engine and transmission
   Position a floor jack with a wood block under the transmission oil pan to support the engine/transmission assembly. Apply slight upward pressure to take the weight off the rear mount, but do not lift the engine significantly.
2. 2

   Remove rear mount through bolt
   Locate the through bolt that passes horizontally through the rear engine mount. Remove the nut from the through bolt and drive or pull the bolt out of the mount assembly. This bolt connects the engine bracket to the mount insulator.
3. 3

   Remove engine mount-to-block bolts
   Remove the bolts securing the upper engine mount bracket to the engine block or transmission bellhousing. There are typically 2-3 bolts. Support the bracket as you remove the last bolt to prevent it from falling.
   Torque spec

   Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
4. 4

   Remove mount-to-frame bolts
   Remove the bolts securing the lower mount insulator to the transmission crossmember or frame. These bolts thread upward through the crossmember into the mount. Use a socket and extension from below to access them.
   Torque spec

   Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
5. 5

   Remove rear engine mount assembly
   Lower the jack slightly to create clearance, then remove the complete rear mount assembly including both the upper bracket and lower insulator. Inspect the removed mount for cracks, separation of rubber from metal, or oil contamination which indicate failure.
6. 6

   Install new mount insulator to frame
   Position the new lower mount insulator onto the transmission crossmember or frame. Start all mount-to-frame bolts by hand to ensure proper alignment before tightening. Torque bolts to specification.
   Torque spec

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

   Install upper mount bracket to engine
   Raise the floor jack to align the upper engine mount bracket with the bolt holes on the engine block or transmission bellhousing. Install and hand-tighten all engine mount-to-block bolts, then torque to specification in a crisscross pattern.
   Torque spec

   Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
8. 8

   Install through bolt
   Adjust the jack height until the holes in the upper bracket and lower insulator align perfectly. Insert the mount through bolt and install the nut. Torque the through bolt to specification. This is a critical fastener for mount integrity.
9. 9

   Remove engine support and reinstall components
   Carefully lower and remove the floor jack from under the transmission. Reinstall any skid plates, crossmembers, or covers that were removed for access. Torque mounting bolts or cover bolts as applicable.

Reassembly

1. Reinstall all skid plates and protective covers removed during disassembly
2. Reconnect negative battery cable
3. Lower vehicle from jack stands

Verification

• Start the engine and observe the rear mount for excessive movement or vibration
• Shift transmission through all gear positions while observing mount - movement should be minimal
• Rev engine to 2000 RPM and release - engine should return smoothly without excessive rocking
• Test drive vehicle and verify no unusual vibrations or clunking from rear of engine during acceleration or deceleration
• Re-inspect all mount bolts after 50-100 miles of driving to ensure they remain tight

Related trouble codes on this vehicle

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