engine

Engine Mount - Front

for 2021 Honda Civic 1.5L I4 Turbo · FWD

Difficulty

Moderate

Time

1.5 h

Tools

Steps

Replace the front engine mount on a 2016-2021 Honda Civic 1.5L Turbo to eliminate vibration and restore proper engine support.

Warnings

⚠️Never work under a vehicle supported only by a jack. Always use jack stands rated for the vehicle weight.

⚠️The engine must be properly supported at all times during mount replacement to prevent engine drop or injury.

⚠Perform this work on a cold engine to avoid burns from hot components.

⚠Improper torque on engine mount bolts can cause severe vibration or mount failure.

Tools required

Floor jackEssential

Jack standsEssential

Engine support bar or jack with wood blockEssential

Socket set (10mm-19mm)Essential

Torque wrench (10-100 Nm range)Essential

Ratchet and extensionsEssential

12mm wrench

Pry bar

Wire brush

Parts

Front engine mount assembly × 1 — Use OEM specification (Honda 50820-TBA-A01 or equivalent)

Preparation

Park vehicle on level surface and apply parking brake
Allow engine to cool completely
Disconnect negative battery terminal
Raise front of vehicle and support securely on jack stands
Remove engine under cover if equipped

Procedure

1
Support the engine
Place an engine support bar across the engine bay and attach to engine lifting points, or position a floor jack with a wood block under the oil pan to support engine weight. Raise slightly to take weight off mounts but do not lift engine excessively.
⚠️Ensure engine support is stable and secure before proceeding. Engine must not shift during mount removal.
2
Remove front mount upper bracket
Locate the front engine mount on the passenger side of engine. Remove the upper bracket cover bolts if equipped. Remove the mount-to-engine block bolts (typically 3 bolts) securing the mount bracket to the engine block.
Torque spec
Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
3
Remove mount through-bolt
Locate the large horizontal through-bolt that passes through the center of the mount assembly. Remove the nut from the through-bolt and slide the bolt out. You may need to use a pry bar to slightly separate components.
4
Remove mount-to-frame bolts
Working from underneath the vehicle, locate the bolts securing the lower portion of the front mount to the subframe. Remove these bolts (typically 2-3 bolts). Support the mount as you remove the final bolt.
Torque spec
Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
5
Remove engine mount assembly
Carefully lower and remove the front engine mount assembly from the vehicle. The mount may be wedged in place, so wiggle it free if necessary. Inspect mounting surfaces on engine block and subframe for damage or corrosion.
6
Prepare mounting surfaces
Clean all mounting surfaces on the engine block and subframe using a wire brush. Remove any rust, dirt, or old gasket material. Inspect threads on engine block and subframe bolt holes for damage. Compare old mount to new mount to ensure correct replacement part.
7
Install new engine mount to subframe
Position the new front engine mount assembly onto the subframe. Start all mount-to-frame bolts by hand, ensuring proper alignment. Do not fully tighten yet.
Torque spec
Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
8
Install mount through-bolt
Align the upper portion of the mount with the engine bracket. Insert the mount through-bolt and start the nut by hand. Ensure proper alignment of all mount components before tightening.
9
Install upper mount bracket to engine
Position the upper mount bracket to the engine block. Install the engine mount-to-block bolts and hand-tighten. Verify all components are properly seated and aligned.
10
Torque mount-to-frame bolts
Using a torque wrench, tighten the mount-to-frame bolts to specification in a cross pattern if multiple bolts are present.
Torque spec
Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
11
Torque through-bolt
Torque the mount through-bolt to specification. Hold the bolt head while tightening the nut to prevent spinning.
12
Torque mount-to-block bolts
Torque the engine mount-to-block bolts to specification in a sequential pattern from center outward if applicable.
Torque spec
Engine Mount-to-Block Bolts65 Nm (48 lb-ft)
13
Remove engine support and lower vehicle
Carefully remove the engine support bar or floor jack from under the engine. Reinstall the engine under cover if equipped. Lower the vehicle from jack stands.

Reassembly

Reconnect negative battery terminal
Verify all tools and parts are removed from engine bay
Double-check that all bolts are properly torqued

Verification

Start engine and allow to idle - verify no excessive vibration
With engine running, shift through all gear positions (P, R, N, D) and verify mount is secure with no abnormal movement
Perform a test drive and monitor for vibrations at idle, during acceleration, and deceleration
Visually inspect mount installation after test drive to ensure no bolts have loosened
Verify engine sits level and at proper height compared to before repair