suspension
Strut Bearing
for 2015 Kia Forte 1.8L I4 · FWD
Editorial review:Chris Hackleman — Master Technician · 20+ years
Difficulty
Moderate
Time
2.5 h
Tools
12
Steps
15
✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman — 20+ years each). Always follow the vehicle's factory service information and torque specs.
Replace the front strut bearing (upper strut mount bearing) to eliminate noise and restore proper steering return and suspension function.
Warnings
⚠️Compressed coil springs contain extreme energy. Improper use of spring compressors can cause catastrophic failure resulting in severe injury or death. Use only heavy-duty spring compressors rated for this application and follow manufacturer instructions exactly.
⚠️This repair affects critical steering and suspension components. Improper installation can cause loss of vehicle control, wheel separation, or suspension collapse. If you are not completely confident in your abilities, have this work performed by a qualified technician.
⚠️Never work under a vehicle supported only by a jack. Always use jack stands rated for the vehicle weight and place on proper jacking points.
⚠Mark the orientation of the strut mount before disassembly to ensure correct reinstallation. Improper orientation can cause steering problems and premature wear.
⚠Inspect all suspension components during disassembly. Replace any worn or damaged parts including sway bar links, tie rod ends, and ball joints.
Tools required
Floor jack and jack standsEssential
Wheel chocksEssential
Torque wrench (30-180 Nm range)Essential
Socket set (10mm-22mm)Essential
Coil spring compressorEssential
Allen key setEssential
Strut vise or bench viseEssential
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Parts
- Front strut bearing/upper mount assembly × 2 — Use OEM specification (546102K000)
- Upper strut mount isolator (if not included with bearing) × 2 — Use OEM specification
- Strut mount dust boot (if damaged) × 2 — Use OEM specification
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Preparation
- Park vehicle on level, solid surface and engage parking brake
- Place wheel chocks behind rear wheels
- Loosen front wheel lug nuts 1/2 turn while vehicle is on ground
- Raise front of vehicle with floor jack at manufacturer jacking points
- Support vehicle with jack stands placed at proper support points on frame rails
- Remove front wheels completely
- Spray penetrating oil on strut tower nuts, strut-to-knuckle bolts, and sway bar link nuts if corrosion is present
- Take photos of strut mount orientation from top side before removal
Procedure
- 1Access strut tower mounting nutsOpen hood and locate the strut tower in the engine compartment. Remove the plastic strut tower cap by prying gently if equipped. You will see 3 nuts securing the top of the strut assembly to the strut tower. Do NOT remove the center nut yet (this holds the spring compressed).
- 2Disconnect sway bar linkLocate the sway bar link connecting the sway bar to the strut assembly. Use an Allen key to hold the shaft from rotating while loosening the upper nut with a wrench. Remove the nut and disconnect the sway bar link from the strut. Let the link hang from the sway bar.Torque specSway Bar Link58 Nm (43 lb-ft)
- 3Remove strut-to-knuckle boltsLocate the two bolts connecting the bottom of the strut to the steering knuckle. These are large bolts passing through the strut bracket. Support the strut assembly with one hand or have an assistant hold it. Remove both bolts completely. You may need to use a pry bar to separate the knuckle from the strut bracket slightly.⚠The strut assembly will become loose once the knuckle bolts are removed. Support it to prevent sudden dropping.Torque specStrut-to-Knuckle Bolts116 Nm (86 lb-ft)
- 4Remove strut tower mounting nutsReturn to the engine compartment. While supporting the strut assembly from below (or having an assistant hold it), remove the 3 nuts securing the strut tower mount. Keep the nuts organized. Carefully lower the entire strut assembly out through the wheel well.⚠Do NOT remove the center strut shaft nut while the spring is still compressed. This must only be done with the spring properly compressed in a spring compressor.Torque specStrut Tower Nuts50 Nm (37 lb-ft)
- 5Secure strut in viseMount the strut assembly securely in a bench vise or strut vise, clamping on the strut body (not the shaft). Position it so the spring compressor can be installed. Ensure the vise jaws will not damage the strut body.
- 6Compress coil springInstall the coil spring compressor tools on opposite sides of the spring (180 degrees apart), engaging at least 3 full coils on each side. Tighten the compressor tools evenly and gradually, alternating between sides. Compress until the spring tension is completely relieved from the upper mount (you should be able to wiggle the mount slightly). Verify the spring is secure and evenly compressed before proceeding.⚠️Ensure spring compressor tools are fully engaged and tightened according to manufacturer instructions. Check frequently during compression that tools are not slipping. Uneven compression or tool failure can cause violent spring release.
- 7Remove strut shaft nut and upper mountHold the strut shaft from rotating using an Allen key in the top center or a specialized strut rod socket. Remove the upper strut shaft nut. Carefully remove the upper mount assembly, bearing, spring seat, dust boot, and any other components in order. Note the exact orientation and order of all parts for reassembly.⚠Take detailed photos or notes of the order and orientation of all components as you remove them. Incorrect reassembly can cause noise, poor handling, and premature failure.
- 8Inspect and clean componentsInspect the strut shaft for damage, scoring, or rust. Clean the strut shaft threads with a wire brush. Examine the spring for cracks or damage. Check the spring seat and dust boot for wear. Verify the new strut bearing rotates smoothly without binding or roughness.
- 9Install new strut bearing and mountAssemble the new strut bearing and upper mount components onto the strut shaft in the exact reverse order of removal. Ensure the bearing is oriented correctly (refer to photos taken during disassembly). Install the spring seat, isolator, and dust boot in proper position. Thread the upper strut shaft nut onto the shaft hand-tight.
- 10Torque strut shaft nutHold the strut shaft from rotating and torque the upper strut shaft nut to specification (typically 40-50 Nm, but verify with service manual as this torque is not in your provided list). Ensure the mount is properly seated and all components are aligned correctly.ℹ️The center strut shaft nut torque specification is not provided in the database for this vehicle. Consult a factory service manual or use 45 Nm (33 lb-ft) as a typical value for this application, but verify before final torque.
- 11Release spring compressorCarefully and evenly loosen the spring compressor tools, alternating between sides. Allow the spring to gradually expand and seat properly against the upper and lower spring seats. Once spring is fully seated and tension is on the mount, remove the compressor tools completely.
- 12Reinstall strut assemblyLift the strut assembly back into position, guiding the upper mount studs through the strut tower holes. Align the mount orientation to match the original position (verify against photos). Install the 3 strut tower nuts and torque to specification. From below, align the strut bracket with the steering knuckle.Torque specStrut Tower Nuts50 Nm (37 lb-ft)
- 13Install strut-to-knuckle boltsInsert the two strut-to-knuckle bolts through the knuckle and strut bracket. You may need to use a pry bar to align the holes. Install nuts and torque to specification. Ensure the knuckle is fully seated against the strut bracket.Torque specStrut-to-Knuckle Bolts116 Nm (86 lb-ft)
- 14Reconnect sway bar linkLift the sway bar link back into position on the strut mounting point. Install the nut while using an Allen key to hold the shaft from rotating. Torque the nut to specification.Torque specSway Bar Link58 Nm (43 lb-ft)
- 15Reinstall wheels and lower vehicleReinstall the front wheels and hand-tighten lug nuts in a star pattern. Lower the vehicle until the wheels just touch the ground but most weight is still on jack stands. Torque lug nuts to specification in a star pattern. Fully lower vehicle and remove jack stands. Bounce front end several times to settle suspension.Torque specWheel Lug Nuts129 Nm (95 lb-ft)
Reassembly
- Repeat entire procedure for opposite side if replacing both strut bearings (recommended to replace both simultaneously)
- Reinstall any plastic strut tower caps removed during access
- Verify all fasteners are properly torqued and no tools or parts are left in engine compartment or wheel wells
- Check that dust boots are properly seated and not torn or displaced
Verification
- Turn steering wheel lock-to-lock while stationary and verify smooth operation with no binding, clicking, or popping noises from strut towers
- Test drive vehicle at low speed in a safe area and verify steering returns to center properly after turns
- Listen for any clunking or knocking noises over bumps that would indicate improper installation
- Verify no unusual tire wear patterns develop after 100-200 miles
- Have a professional alignment performed immediately after this repair, as suspension geometry may have shifted during disassembly