Complete replacement of all engine mounts including front mount, rear mount, and side mounts on the 2015 Kia Forte 1.8L I4 engine to eliminate vibration and restore proper engine support.

Warnings

Tools required

Parts

• Front engine mount assembly × 1 — Use OEM specification
• Rear engine mount (torque strut) × 1 — Use OEM specification
• Right side engine mount × 1 — Use OEM specification
• Transmission mount × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Allow engine to cool completely (minimum 2 hours after running).
3. Disconnect negative battery terminal and secure cable away from battery.
4. Raise front of vehicle and support securely on jack stands under manufacturer-specified lift points.
5. Remove front wheels to improve access to lower mount fasteners.
6. Remove engine undershield/splash shield if equipped.
7. Apply penetrating oil to all mount fastener threads and allow 15-20 minutes to penetrate.

Procedure

1. 1

   Install engine support system
   Position engine support bar across fender edges or install engine hoist with lifting chains attached to dedicated engine lift points. Slowly apply upward tension to support engine weight but do not lift engine yet. Ensure support is stable and secure before proceeding.
2. 2

   Remove right side engine mount
   From above engine bay, locate right side mount between engine block and frame rail. Remove mount-to-frame bolts first (typically 3 bolts). Position floor jack under engine oil pan with wide wooden block as cushion. Raise jack slightly to take load off mount. Remove mount-to-block bolts and extract mount assembly from engine bay.
   Torque spec

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

   Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
3. 3

   Remove front engine mount
   From underneath vehicle, locate front engine mount at front-lower area of engine. Remove the through-bolt securing mount to subframe bracket. Remove mounting bolts securing mount bracket to engine block. Carefully extract mount assembly downward. Note orientation of mount for reinstallation.
   Torque spec

   Through-Bolt85 Nm (63 lb-ft)

   Mounting Bolts45 Nm (33 lb-ft)
4. 4

   Remove rear engine mount (torque strut)
   Locate rear mount assembly connecting top of engine to firewall/frame. This torque strut is typically accessed from above. Remove mount-to-frame bolts at firewall end first. Remove mount through-bolt at engine bracket end. Extract complete mount assembly from engine bay.
   Torque spec

   Mount Through Bolt84 Nm (62 lb-ft)

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

   Remove transmission mount
   From underneath vehicle, locate transmission mount on driver side of transmission. Position floor jack under transmission pan with wooden block cushion to support weight. Raise jack slightly to support transmission. Remove transmission mount bolts securing mount to transmission bracket. Remove mount-to-subframe bolts and extract mount assembly.
   Torque spec

   Transmission Mount Bolts65 Nm (48 lb-ft)
6. 6

   Clean mounting surfaces
   With all mounts removed, use wire brush to clean all mounting surfaces on engine block, transmission, and frame/subframe. Remove rust, old rubber debris, and corrosion. Inspect mounting brackets for cracks or damage. Replace any damaged brackets before installing new mounts.
7. 7

   Install new transmission mount
   Position new transmission mount onto subframe mounting points and loosely install mount-to-subframe bolts. Ensure floor jack is still supporting transmission weight. Align mount to transmission bracket and install transmission mount bolts. Do not fully tighten yet.
   Torque spec

   Transmission Mount Bolts65 Nm (48 lb-ft)
8. 8

   Install new front engine mount
   Position new front mount into location from underneath vehicle. Align mount bracket to engine block and install mounting bolts finger-tight. Install through-bolt connecting mount to subframe bracket but do not tighten yet. Verify mount is properly seated and aligned.
   Torque spec

   Through-Bolt85 Nm (63 lb-ft)

   Mounting Bolts45 Nm (33 lb-ft)
9. 9

   Install new rear engine mount
   Position new rear mount (torque strut) into engine bay. Install mount through-bolt at engine bracket end finger-tight. Align firewall/frame end of mount and install mount-to-frame bolts finger-tight. Verify mount is not twisted or misaligned.
   Torque spec

   Mount Through Bolt84 Nm (62 lb-ft)

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

    Install new right side engine mount
    Position new right side mount between engine block and frame rail. Install mount-to-block bolts finger-tight. Align mount to frame bracket and install engine mount-to-frame bolts finger-tight. Use engine support to adjust engine position if needed for proper alignment.
    Torque spec

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

    Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
11. 11

    Align engine and transmission position
    With all mounts loosely installed, use engine support bar or hoist to carefully adjust engine position to center it in engine bay. Adjust fore-aft and side-to-side position to minimize stress on mounts. Lower transmission jack slightly to settle transmission onto mount. Verify all mounts are unstressed and properly aligned.
12. 12

    Torque all mount fasteners
    Following sequence: Start with transmission mount bolts to specification. Torque front mount mounting bolts and through-bolt to specification. Torque rear mount through-bolt and mount-to-frame bolts to specification. Finally torque right side mount-to-block bolts and mount-to-frame bolts to specification. Use torque wrench for all critical fasteners.
    Torque spec

    Transmission Mount Bolts65 Nm (48 lb-ft)

    Mounting Bolts45 Nm (33 lb-ft)

    Through-Bolt85 Nm (63 lb-ft)

    Mount Through Bolt84 Nm (62 lb-ft)

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

    Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
13. 13

    Remove support equipment and reinstall components
    Slowly release tension from engine support bar or hoist to transfer full engine weight onto new mounts. Remove engine support equipment. Remove floor jack from under transmission and engine. Reinstall engine undershield/splash shield. Reinstall front wheels and torque lug nuts to specification.

Reassembly

1. Reconnect negative battery terminal and tighten securely.
2. Lower vehicle from jack stands to ground.
3. Start engine and verify no abnormal vibrations or movement.
4. If equipped with any engine mount-related sensors or covers, ensure all are properly reinstalled and secured.

Verification

• With engine running at idle, observe engine movement - should be minimal with no excessive shaking.
• Rev engine from idle to 2000 RPM and release - engine should settle smoothly without harsh movement.
• Visually inspect all mounts to confirm no contact between engine and frame/subframe.
• Test drive vehicle through various speeds and acceleration rates to confirm vibration is eliminated.
• Perform final visual inspection of all mount fasteners to confirm proper torque and no looseness.
• Listen for any knocking or clunking noises during acceleration or deceleration that could indicate mount issues.

More procedures for this vehicle