This procedure covers removal and replacement of the front engine mount on a 2014-2019 Toyota Corolla with the 1.8L I4 engine, requiring engine support and partial drivetrain disassembly.

Warnings

Tools required

Parts

• Front engine mount assembly × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery cable and secure away from terminal
3. Raise front of vehicle and support securely on jack stands under frame rails
4. Remove plastic engine under cover if equipped
5. Inspect all engine mounts for damage; if multiple mounts are damaged, replace all simultaneously

Procedure

1. 1

   Support the engine
   Position an engine support bar across the engine bay and attach lifting chain to designated engine lift point. Alternatively, place a floor jack under the oil pan with a wooden block to distribute load. Apply slight upward pressure to take weight off mounts, but do not lift engine significantly.
   ⚠Use a wooden block between jack and oil pan to prevent damage to pan. Do not jack directly against aluminum oil pan.
2. 2

   Remove front mount through-bolt
   Locate the front engine mount through-bolt that passes horizontally through the mount assembly. Using a socket and wrench, remove the through-bolt nut while holding the bolt head. Remove the through-bolt completely and set aside.
   Torque spec

   Through-Bolt85 Nm (63 lb-ft)
3. 3

   Disconnect mount from engine block
   Locate the upper mounting bolts securing the engine mount bracket to the engine block (typically 3-4 bolts). Remove these bolts using appropriate socket. Support the mount assembly as you remove the final bolt to prevent it from falling.
   Torque spec

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

   Remove mount-to-frame fasteners
   Access the lower mounting bolts that secure the engine mount to the subframe or crossmember. These may require working from below the vehicle. Remove all mount-to-frame bolts.
   Torque spec

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

   Extract front engine mount
   With all fasteners removed, carefully lower or maneuver the front engine mount assembly out of the engine bay. Note the orientation and positioning of any brackets, washers, or spacers for reinstallation. The mount may need to be tilted or rotated to clear surrounding components.
6. 6

   Inspect mounting surfaces
   Clean all mounting surfaces on the engine block and subframe using a wire brush. Remove any corrosion, old thread locker, or debris. Inspect threaded holes for damage and chase with appropriate tap if necessary. Check that mount brackets are not cracked or deformed.
7. 7

   Position new engine mount
   Orient the new front engine mount assembly in the same position as the original. Maneuver it into place between the engine and subframe, ensuring all mounting holes align properly. You may need to adjust engine height slightly using the support jack or bar.
8. 8

   Install mount-to-frame bolts
   Start all mount-to-frame bolts by hand to ensure proper thread engagement. Once all bolts are started, torque them to specification in a cross-pattern to ensure even seating of the mount.
   Torque spec

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

   Install mount-to-block bolts
   Install the upper mounting bolts securing the mount bracket to the engine block. Start all bolts by hand first, then torque to specification in a cross-pattern.
   Torque spec

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

    Install through-bolt
    Insert the mount through-bolt and install the retaining nut. Ensure the bolt passes cleanly through all mount bushings without binding. Torque the through-bolt nut to specification while holding the bolt head stationary.
    Torque spec

    Through-Bolt85 Nm (63 lb-ft)
11. 11

    Remove engine support
    Carefully lower the engine onto the new mount by slowly releasing tension on the engine support bar or jack. Ensure the engine settles evenly onto all mounts without binding or unusual angles. Remove the support equipment completely.
    ⚠Lower engine slowly and observe all mount points. If mount appears to bind or misalign, re-support engine and investigate before proceeding.

Reassembly

1. Reinstall plastic engine under cover if equipped
2. Lower vehicle from jack stands
3. Reconnect negative battery cable
4. Clear any diagnostic trouble codes that may have been set from battery disconnection

Verification

• Start engine and verify smooth idle with no excessive vibration or abnormal noises
• With engine running, have assistant shift through all transmission gear positions while observing engine movement; excessive movement indicates mount failure or improper installation
• Perform a test drive at various speeds and acceleration rates to confirm normal engine vibration characteristics
• Re-inspect all mount bolts after 50-100 miles of driving to ensure proper torque retention

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