Engine Mount - Front

This procedure covers the removal and replacement of the front engine mount on a 1994-2007 Dodge Ram 2500 with the 5.9L Cummins I6 diesel engine.

Warnings

Tools required

Parts

• Front engine mount assembly × 1 — Use OEM Mopar or quality aftermarket

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Disconnect negative battery cable to prevent electrical shorts during work
3. Allow engine to cool completely if recently operated
4. Spray all engine mount fasteners with penetrating oil and allow to soak
5. Raise front of vehicle and support securely on jack stands under frame rails
6. Remove engine skid plate if equipped to access front mount

Procedure

1. 1

   Support engine weight
   Position a floor jack with a wood block under the oil pan, slightly forward of the pan's center. Raise jack until it just contacts the pan and begins to take weight, but do not lift engine yet. Alternatively, install an engine support bar across the fender wells with chains attached to engine lifting points.
2. 2

   Identify front engine mount location
   Locate the front engine mount on the side of the engine block, near the front of the block. Note that the Cummins has a mount on each side; identify which side you are servicing. The mount consists of a rubber isolator sandwiched between an engine-side bracket and a frame-side bracket, secured by a through-bolt.
3. 3

   Remove through-bolt
   Remove the fastener(s) securing the isolator/through the engine mount isolator (configuration varies by year — some use a horizontal through-bolt with nut, others use vertical bolts through the frame bracket). Support any bolt as you remove its nut to prevent it from falling. Remove the fastener(s) and set aside.
4. 4

   Raise engine slightly
   Using the floor jack or engine support bar, carefully raise the engine approximately 1-2 inches to relieve all tension on the front mount. Monitor engine position to ensure no contact with firewall, accessories, or hoses. Check that transmission and transfer case do not bind.
   ⚠Raise engine slowly and check all clearances. Excessive lifting can damage fan shroud, radiator hoses, or exhaust components.
5. 5

   Remove engine-side mount bracket
   Remove the bolts securing the engine mount bracket to the engine block. These bolts thread directly into the engine block. Note the exact number and location of bolts as you remove them (verify count against factory service documentation for your model year). Keep hardware organized for reinstallation.
   ℹ️These bolts may be heavily corroded. Use 6-point sockets and apply additional penetrating oil if needed.
6. 6

   Remove frame-side mount bracket
   Remove the bolts securing the frame-side mount bracket to the frame rail. These bolts are typically accessed from below. The bracket may be bonded to the frame with corrosion; use a pry bar if necessary to break it free after bolts are removed.
7. 7

   Remove old mount assembly
   Extract the complete mount assembly including both brackets and rubber isolator. Inspect all components for wear, cracking, oil saturation, or separation. Compare old mount to new mount to verify correct replacement part.
8. 8

   Clean mounting surfaces
   Use a wire brush to clean all mounting surfaces on the engine block and frame rail. Remove all rust, old gasket material, and debris. Ensure bolt holes are clean and threads are not damaged.
9. 9

   Install frame-side bracket
   Position the new frame-side mount bracket on the frame rail and start all bolts by hand. Ensure bracket is properly aligned before tightening. Torque bolts to the factory specification for your model year (verify against Mopar service documentation).
   Torque spec

   Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
10. 10

    Install engine-side bracket
    Position the engine-side mount bracket on the engine block and start all bolts by hand. Verify proper alignment and seat bracket fully against block. Torque bolts to the factory specification for your model year (verify against Mopar service documentation).
    Torque spec

    Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
11. 11

    Lower engine onto mount
    Carefully lower the engine using the floor jack or support bar until the engine-side bracket aligns with the frame-side bracket through the rubber isolator. The through-bolt holes should align when engine is at proper height.
12. 12

    Install through-bolt
    Insert the through-bolt (or vertical bolts, depending on mount design) through the brackets and rubber isolator. Install and tighten the nut/bolts to the factory torque specification for your model year (verify against Mopar service documentation). Ensure the bolt passes cleanly through all components without binding.
    Torque spec

    Engine Mount Through-Bolt85 Nm (63 lb-ft)
13. 13

    Remove engine support
    Carefully remove the floor jack or engine support bar. Verify that engine weight is fully supported by the new mount and engine sits level. Check that no wiring, hoses, or components are stressed or pinched.

Reassembly

1. Reinstall engine skid plate if equipped, using proper fasteners
2. Lower vehicle from jack stands
3. Reconnect negative battery cable
4. Verify all tools and parts have been removed from engine compartment

Verification

• Start engine and observe mount for excessive movement or vibration
• With engine running, shift transmission through all gears while observing mount for proper operation
• Check for any unusual noises or vibrations that were not present before
• Visually inspect mount after test drive to ensure all bolts remain tight and mount shows no signs of failure
• Verify no contact between engine components and firewall, fan shroud, or frame during engine rock test (apply throttle in gear with brake applied)

Related trouble codes on this vehicle

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