Engine Mount - Strut

Replace the engine mount strut (torque strut) that controls engine torque reaction and limits engine movement on the 5.9L Cummins diesel engine.

Warnings

Tools required

Parts

• Engine mount strut (torque strut) × 1 — Use OEM Mopar specification
• Engine mount strut hardware kit (if not included) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Chock rear wheels securely
3. Allow engine to cool completely if recently operated
4. Disconnect negative battery cable
5. Apply penetrating oil to engine mount strut fasteners and allow to soak for 15-30 minutes
6. Raise front of vehicle and support securely on jack stands under the frame rails
7. Remove engine cover if equipped

Procedure

1. 1

   Install engine support
   Install an engine support bar across the engine compartment fender rails, or attach an overhead hoist with chains to secure engine lifting points. The Cummins 5.9L is equipped with factory lifting eyes; verify their exact location before attaching lifting equipment. Ensure the support can handle at least 1,200 pounds. Take up slight tension but do not lift the engine yet.
2. 2

   Identify engine mount strut location
   Locate the engine mount/strut on this vehicle. Verify the exact location, orientation, and configuration against the factory service manual for the 5.9L Cummins, as engine mount configuration on this platform must be confirmed before proceeding.
3. 3

   Document routing and position
   Take photos or make detailed notes of the strut orientation, bracket positions, and any spacers or washers present. Note the direction of any offset in the mounting brackets. This will be critical for proper reinstallation.
4. 4

   Support engine weight
   Using the engine support bar or hoist, take up engine weight until there is no load on the engine mount strut. Lift only enough to unload the strut; do not raise the engine more than 1/4 inch. Monitor cooling system hoses and verify nothing is under strain.
5. 5

   Remove frame bracket fasteners
   Remove the bolts securing the engine mount strut to the frame bracket. These are typically two or three bolts. Support the strut as you remove the last fastener. The strut may be heavy and under residual tension.
6. 6

   Remove engine bracket fasteners
   Remove the bolts securing the engine mount strut to the engine block bracket. On some models this may be a through-bolt design; on others it may use studs and nuts. Keep all hardware organized and note any differences in bolt length or type.
7. 7

   Remove engine mount strut
   Carefully remove the engine mount strut from the vehicle. It may be necessary to rotate or angle the strut to clear surrounding components. Inspect the mounting brackets on both the engine and frame for damage, cracks, or excessive wear.
8. 8

   Clean mounting surfaces
   Use a wire brush to clean the mounting surfaces on both the engine bracket and frame bracket. Remove rust, corrosion, and old thread-locking compound from bolt holes. Inspect threads for damage.
9. 9

   Compare old and new struts
   Place the old and new engine mount struts side by side and verify they are identical in length, mounting hole positions, and bracket orientation. Verify all bushings and hardware are present on the new strut.
10. 10

    Install new engine mount strut
    Position the new engine mount strut into place, starting with the engine bracket end. Install bolts finger-tight only. The engine must be at the correct height for bolt holes to align without force. Use a pry bar if minor adjustment is needed, but do not force bolts through misaligned holes.
11. 11

    Install frame bracket fasteners
    Install the frame bracket fasteners finger-tight. Verify all washers and spacers are in their original positions. Ensure the strut is seated properly in both brackets before tightening.
12. 12

    Torque all fasteners
    Torque all engine mount strut fasteners to manufacturer specifications. Torque values must be obtained from the factory service manual for this vehicle; do not rely on generic ranges as engine mount fasteners on the Cummins are application-specific. Torque in a cross pattern if multiple bolts are present at each location.
13. 13

    Remove engine support
    Carefully lower the engine using the support bar or hoist until the engine weight is fully transferred to the mounts. Remove the engine support equipment. Verify the engine settles into proper position without binding.

Reassembly

1. Reinstall engine cover if removed
2. Lower vehicle from jack stands
3. Reconnect negative battery cable
4. Remove wheel chocks

Verification

• Start engine and verify no unusual vibration or movement
• With engine running, have an assistant apply moderate throttle while observing engine movement - it should be minimal and controlled
• Visually inspect all mount strut fasteners to confirm they are tight and properly seated
• Test drive vehicle and verify no excessive engine movement during acceleration or deceleration
• Listen for clunking noises during throttle application which would indicate loose or failed mounting
• After 50-100 miles, re-inspect all fasteners for tightness

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