Engine Mounts - All

Complete removal and replacement of all engine mounts (left, right, and rear) on the 1992 Dodge Viper 8.0L V10, requiring engine support and access from above and below.

Warnings

Tools required

Parts

• Left engine mount assembly × 1 — Use OEM specification
• Right engine mount assembly × 1 — Use OEM specification
• Rear engine mount assembly × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Disconnect negative battery cable to prevent accidental starter engagement.
3. Raise vehicle and support securely on jack stands at all four corners at appropriate lift points.
4. Remove engine cover if equipped.
5. Apply penetrating oil to all engine mount fasteners and allow to soak while preparing support equipment.

Procedure

1. 1

   Install engine support system
   Position engine support fixture across the engine bay fender rails, or attach engine hoist to approved lifting points on the engine. The V10 has lifting eyes near the front of each cylinder bank. Tension the support to just barely take load off the engine mounts without lifting the engine. The mounts should still be supporting most of the weight at this stage.
2. 2

   Access and inspect engine mounts
   From below, locate all three mounts: left mount on driver side engine block to frame, right mount on passenger side engine block to frame, and the transmission mount at the transmission to crossmember. Verify exact mount locations against factory service documentation for the Gen 1 Viper. Inspect for oil contamination, torn rubber, or separated metal components to confirm all mounts require replacement. Note the orientation of each mount before removal.
3. 3

   Remove left engine mount
   From below, remove the through-bolt securing the left engine mount to the frame bracket (verify size against factory documentation). Then remove the engine mount-to-block bolts from the engine side of the mount. Carefully lift engine slightly with support fixture (approximately 1/4 inch) to relieve remaining tension, then remove the mount assembly from between the block and frame. Note the presence of any shims or spacers for reinstallation.
   Torque spec

   Through-Bolt68 Nm (50 lb-ft)

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

   Remove right engine mount
   From below, remove the through-bolt securing the right engine mount to the frame bracket (verify size against factory documentation). Remove the engine mount-to-block bolts from the engine side. Lift engine slightly if needed to relieve tension, then remove the mount assembly. The right mount may require working around exhaust components for access.
   Torque spec

   Through-Bolt68 Nm (50 lb-ft)

   Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
5. 5

   Support transmission
   Place a floor jack with a wide wooden block under the transmission pan to support the transmission weight. Raise jack until it just contacts the pan without lifting. This prevents stress on the drivetrain when the rear mount is removed.
6. 6

   Remove rear engine mount
   From below, remove the mounting bolts securing the rear mount to the transmission (verify bolt count and locations against factory documentation). Then remove the mount-to-frame bolts securing the mount bracket to the crossmember. Lower the jack supporting the transmission slightly if needed to access all fasteners. Remove the rear mount assembly.
   Torque spec

   Mounting Bolts47 Nm (35 lb-ft)

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

   Clean mounting surfaces
   With all mounts removed, use a wire brush to thoroughly clean all mounting surfaces on the engine block, frame brackets, and crossmember. Remove rust, corrosion, old thread-locker, and debris. Inspect mounting bolt threads and replace any damaged bolts. Verify frame brackets are not cracked or damaged.
   ℹ️Clean mounting surfaces are critical for proper torque values and mount longevity.
8. 8

   Install new rear engine mount
   Position the new rear mount assembly between the transmission/engine and the crossmember. Install the mount-to-frame bolts finger-tight first, then install the mounting bolts to the bellhousing or engine block finger-tight. Torque the mounting bolts to the engine/transmission first to specification, then torque the mount-to-frame bolts to specification.
   Torque spec

   Mounting Bolts47 Nm (35 lb-ft)

   Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
9. 9

   Install new right engine mount
   Position the new right engine mount assembly between the engine block and frame bracket, ensuring proper orientation matches the original mount. Install the engine mount-to-block bolts and torque to specification. Lower the engine carefully with the support fixture to align the mount with the frame bracket, then install the through-bolt and torque to specification.
   Torque spec

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

   Through-Bolt68 Nm (50 lb-ft)
10. 10

    Install new left engine mount
    Position the new left engine mount assembly between the engine block and frame bracket in the correct orientation. Install any shims or spacers noted during removal. Install the engine mount-to-block bolts and torque to specification. Lower the engine with the support fixture to align the mount with the frame bracket, then install the through-bolt and torque to specification.
    Torque spec

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

    Through-Bolt68 Nm (50 lb-ft)
11. 11

    Release engine support and verify alignment
    Carefully lower the engine completely onto the new mounts using the support fixture, ensuring the engine settles evenly. Remove the engine support fixture or hoist. Remove the transmission jack. Rock the engine gently by hand to verify all mounts are properly seated and there is no binding or misalignment.
12. 12

    Final inspection
    Verify all mount fasteners are properly torqued and no tools or parts were left in the engine bay. Check that no hoses, wires, or components were stressed during the mount replacement. Reinstall engine cover if equipped. Reconnect the negative battery cable.

Reassembly

1. Torque all fasteners in the sequence specified in the steps, not all at once at the end.
2. Ensure engine settles naturally onto mounts without forcing alignment—misalignment indicates incorrect installation.
3. All through-bolts must be installed with the bolt head on the correct side per factory orientation to prevent interference.

Verification

• Start engine and verify it idles smoothly without excessive vibration transmitted to the chassis.
• With engine running, have an assistant shift transmission through all gears (if automatic) or depress clutch (if manual) while observing engine movement—should be minimal and controlled.
• Perform a test drive and verify no abnormal vibrations, clunking, or engine movement during acceleration, deceleration, or gear changes.
• After test drive, re-inspect all mount fasteners from below to ensure none have loosened.
• Inspect around mounts for any contact marks on surrounding components indicating misalignment.

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