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Contents Wiring diagrams Section: Suspension Front All sections

Front Suspension System Cadillac ATS I

Suspension Front 11 illustrations ~2892 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Front Lower Control Front Link Bolt (1)
First Pass100 N.m74 lb ft
Final PassPlus 90 Degrees
Front Lower Control Rear Link Bolt (1)
First Pass100 N.m74 lb ft
Final PassPlus 90 Degrees
Front Stabilizer Shaft Clamp Nut22 N.m16 lb ft
Front Suspension Strut Nut (at Steering Knuckle) (2)
First Pass150 N.m111 lb ft
Final PassPlus 95 Degrees
Front Suspension Strut Nut (With Electronic Suspension at Top of Front Suspension Strut Mount)48 N.m35 lb ft
Front Suspension Strut Nut (Without Electronic Suspension at Top of Front Suspension Strut Mount)60 N.m44 lb ft
Front Suspension Upper Strut Mount Nut22 N.m16 lb ft
Front Wheel Bearing and Hub Assembly Bolt (AWD)130 N.m96 lb ft
Front Wheel Bearing and Hub Assembly Bolt (RWD)118 N.m87 lb ft
Stabilizer Shaft Link Nut100 N.m74 lb ft
Steering Knuckle Nut
First Pass40 N.m30 lb ft
Final PassPlus 120 Degrees
1. Torque-to-yield fastener in use, requires NEW bolt. 2. Ensure the splines on the front suspension strut bolts are fully seated.

Fastener Tightening Specifications

Adhesives, Fluids, Lubricants, and Sealers

ApplicationType of MaterialGM Part Number
United StatesCanada
Wheel Bearing and Hub BoltThreadlocker8902129710953488

Adhesives, Fluids, Lubricants, and Sealers

Scheme 4

Scheme 4: Stabilizer Shaft Replacement (AWD)
Scheme 4: Stabilizer Shaft Replacement (AWD)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle Remove the engine compartment lower noise shield. Refer to Engine Compartment Lower Noise Shield Replacement . Remove the front air deflector. Refer to Front Air Deflector Replacement . Remove the front wheelhouse splash shield. Refer to Front Wheelhouse Splash Shield Replacement . Disconnect the stabilizer shaft links from the front stabilizer shaft. Refer to Stabilizer Shaft Link Replacement . Remove the steering gear. Electric Belt Drive Rack and Pinion Steering Gear Replacement (RWD Without KC4) , Electric Belt Drive Rack and Pinion Steering Gear Replacement (AWD) , Electric Belt Drive Rack and Pinion Steering Gear Replacement (RWD With KC4) . Paint a reference mark on the front stabilizer shaft where the front stabilizer shaft insulators are located. Transfer the paint mark onto the new front stabilizer shaft. Remove the front stabilizer shaft insulator clamps. Refer to Stabilizer Shaft Insulator Replacement (AWD Only) .
1Front Stabilizer Shaft

Stabilizer Shaft Replacement (AWD)

Removal Procedure

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Remove the engine compartment lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  4. Remove the front air deflector. Refer to «Front Air Deflector Replacement»(/cadillac/ats/i-2012-2014/remont/exterior-body-panels/#bumpers-and-fascias) .
  5. Disconnect the stabilizer shaft links from the front stabilizer shaft. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/ats/i-2012-2014/remont/suspension-front/#front-suspension-system) .
  6. Disconnect the steering gear electrical connectors.
  7. If equipped, remove the engine mount vacuum tank. Refer to «Engine Mount Vacuum Tank Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  8. Using a swivel socket, remove the left side front stabilizer shaft insulator clamp nuts (1) and clamp (2).
  9. Using a swivel socket, remove the right side front stabilizer shaft insulator clamp nuts (1) and clamp (2).
  10. Remove the front stabilizer shaft (1) from the vehicle.

Installation Procedure

  1. Position the front stabilizer shaft (1) on the vehicle.
  2. Using a swivel socket, install the right side front stabilizer shaft insulator clamp (2) and nuts (1) and tighten the nuts to 22 (16 lb ft).
  3. Using a swivel socket, install the left side front stabilizer shaft insulator clamp (2) and nuts (1) and tighten the nuts to 22 (16 lb ft).
  4. If equipped, install the engine mount vacuum tank. Refer to «Engine Mount Vacuum Tank Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-20l-ltg-or-25l-lcv-repair-instructions-on-vehicle) .
  5. Connect the steering gear electrical connectors.
  6. Connect the stabilizer shaft links to the front stabilizer shaft. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/ats/i-2012-2014/remont/suspension-front/#front-suspension-system) .
  7. Install the front air deflector. Refer to «Front Air Deflector Replacement»(/cadillac/ats/i-2012-2014/remont/exterior-body-panels/#bumpers-and-fascias) .
  8. Install the engine compartment lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  9. Install the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Use a jack stand to support the steering knuckle.
  4. Remove the upper stabilizer shaft link nut (1).
  5. Remove the lower stabilizer shaft link nut (1).
  6. Remove the stabilizer shaft link (1) from the vehicle.
  1. Position the stabilizer shaft link (1) on the vehicle.
  2. Install the upper stabilizer shaft link nut (1) and tighten to 100 (74 lb ft).
  3. Install the lower stabilizer shaft link nut (1) and tighten to 100 (74 lb ft).
  4. Remove the jack stand from the steering knuckle.
  5. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .

Scheme 5

Scheme 5: Stabilizer Shaft Insulator Replacement (AWD)
Scheme 5: Stabilizer Shaft Insulator Replacement (AWD)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the engine compartment lower noise shield. Refer to Engine Compartment Lower Noise Shield Replacement . Remove the front air deflector. Refer to Front Air Deflector Replacement . Remove the front wheelhouse splash shield. Refer to Front Wheelhouse Splash Shield Replacement . Disconnect the stabilizer shaft links from the front stabilizer shaft. Refer to Stabilizer Shaft Link Replacement .
1Front Stabilizer Shaft Insulator Clamp Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 22 (16 lb ft)
2Front Stabilizer Shaft Insulator Clamp
3Front Stabilizer Shaft Insulator NOTE: Ensure the NEW front stabilizer shaft insulator is aligned the same way as the old insulator before installing.
CAUTION
Refer to Fastener Caution .
NOTE
Ensure the NEW front stabilizer shaft insulator is aligned the same way as the old insulator before installing.

Stabilizer Shaft Insulator Replacement (AWD Only)

Scheme 6

Scheme 6: Front Wheel Bearing and Hub Replacement (RWD)
Scheme 6: Front Wheel Bearing and Hub Replacement (RWD)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Remove the front brake rotor. Refer to Front Brake Rotor Replacement (JE5) , Front Brake Rotor Replacement (J55) . Remove the front wheel speed sensor from the steering knuckle only and position aside. Refer to Front Wheel Speed Sensor Replacement .
1Front Wheel Bearing and Hub Assembly Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure Thoroughly clean the old threadlocker residue from the threads of each front wheel bearing and hub assembly bolt with an approved solvent and allow to dry. Thoroughly clean the old threadlocker residue from each front wheel bearing and hub assembly bolt hole with an approved solvent and allow to dry. Apply threadlocker to 2/3 of the threaded length of the front wheel bearing and hub assembly bolts and the front wheel bearing and hub assembly bolt holes. Refer to Adhesives, Fluids, Lubricants, and Sealers . Ensure there are no gaps in the threadlocker along the filled area of the front wheel bearing and hub assembly bolts and the front wheel bearing and hub assembly bolt holes. Allow the threadlocker to cure approximately 10 minutes before installing the front wheel bearing and hub assembly bolts. Tighten 118 (87 lb ft)
2Front Wheel Bearing and Hub Assembly Debris Shield
3Front Wheel Bearing and Hub Assembly
CAUTION
Refer to Fastener Caution .

Front Wheel Bearing and Hub Replacement (RWD)

Scheme 7

Scheme 7: Front Wheel Bearing and Hub Replacement (AWD)
Scheme 7: Front Wheel Bearing and Hub Replacement (AWD)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Remove the front brake rotor. Refer to Front Brake Rotor Replacement (JE5) , Front Brake Rotor Replacement (J55) . Remove the front wheel speed sensor from the steering knuckle only and position aside. Refer to Front Wheel Speed Sensor Replacement . Remove the front wheel drive shaft nut and disengage the shaft from the hub only. It is not necessary to remove the shaft completely from the vehicle. Refer to Front Wheel Drive Shaft Replacement - Left Side , or Front Wheel Drive Shaft Replacement - Right Side .
1Front Wheel Bearing and Hub Assembly Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure Thoroughly clean the old threadlocker residue from the threads of each front wheel bearing and hub assembly bolt with an approved solvent and allow to dry. Thoroughly clean the old threadlocker residue from each front wheel bearing and hub assembly bolt hole with an approved solvent and allow to dry. Apply threadlocker to 2/3 of the threaded length of the front wheel bearing and hub assembly bolts and the front wheel bearing and hub assembly bolt holes. Refer to Adhesives, Fluids, Lubricants, and Sealers . Ensure there are no gaps in the threadlocker along the filled area of the front wheel bearing and hub assembly bolts and the front wheel bearing and hub assembly bolt holes. Allow the threadlocker to cure approximately 10 minutes before installing the front wheel bearing and hub assembly bolts. Tighten 130 (96 lb ft)
2Front Wheel Bearing and Hub Assembly
CAUTION
Refer to Fastener Caution .

Front Wheel Bearing and Hub Replacement (AWD)

Scheme 8

Scheme 8: Steering Knuckle Replacement (RWD)
Scheme 8: Steering Knuckle Replacement (RWD)
CalloutComponent Name
Preliminary Procedure Remove the front wheel bearing and hub assembly. Refer to Front Wheel Bearing and Hub Replacement (RWD) . Remove the front brake shield. Refer to Front Brake Shield Replacement . Disconnect the steering linkage outer tie rod from the steering knuckle. Refer to Steering Linkage Outer Tie Rod Replacement (RWD) . Disconnect the front lower control front link from the steering knuckle. Refer to Front Lower Control Front Link Replacement . Disconnect the front lower control rear link from the steering knuckle. Refer to Front Lower Control Rear Link Replacement . Disconnect the strut assembly from the steering knuckle. Refer to Strut Assembly Removal and Installation (FE2 or FE3 With F55 Magnetic Ride Suspension) , Strut Assembly Removal and Installation (FE2 Base) .
1Steering Knuckle Procedure Check and adjust the front wheel alignment specifications. Refer to Wheel Alignment Specifications .

Steering Knuckle Replacement (RWD)

Scheme 9

Scheme 9: Steering Knuckle Replacement (AWD)
Scheme 9: Steering Knuckle Replacement (AWD)
CalloutComponent Name
Preliminary Procedure Remove the front wheel bearing and hub assembly. Refer to Front Wheel Bearing and Hub Replacement (AWD) . Remove the front brake shield. Refer to Front Brake Shield Replacement . Disconnect the steering linkage outer tie rod from the steering knuckle. Refer to Steering Linkage Outer Tie Rod Replacement (RWD) , Steering Linkage Outer Tie Rod Replacement (AWD) . Disconnect the front lower control front link from the steering knuckle. Refer to Front Lower Control Front Link Replacement . Disconnect the front lower control rear link from the steering knuckle. Refer to Front Lower Control Rear Link Replacement . Disconnect the strut assembly from the steering knuckle. Refer to Strut Assembly Removal and Installation (FE2 or FE3 With F55 Magnetic Ride Suspension) , Strut Assembly Removal and Installation (FE2 Base) .
1Steering Knuckle Procedure Check and adjust the front wheel alignment specifications. Refer to Wheel Alignment Specifications .

Steering Knuckle Replacement (AWD)

Front Lower Control Front Link Replacement

Special Tools

J-42188 Ball Joint Separator

For regional equivalent tools, refer to Special Tools .

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Remove the engine compartment lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  4. Remove the underbody front air deflector. For the left side, refer to «Underbody Front Air Deflector Replacement - Left Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) . For the right side, refer to «Underbody Front Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  5. Remove the front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  6. Remove the electrical harness (1) for the electronic suspension from the front lower control front link (2), if equipped.
  7. Using the proper tools, loosen but DO NOT remove the steering knuckle nut (1).
  8. Use the J-42188 separator (1) to separate the front lower control front link from the steering knuckle.
  9. Remove the steering knuckle nut (1).
  10. Remove the front lower control front link nut (1).
  11. Remove and discard the front lower control front link bolt (3). DO NOT reuse. Replace with NEW only.
  12. Remove the front lower control front link (2) from the steering knuckle (4).
  1. Position the front lower control front link (2) in the steering knuckle (4).
  2. Position the front lower control front link (2) in the frame.
  3. Install the NEW front lower control front link bolt (3) and nut (1).
  4. Tighten the NEW front lower control front link bolt (3) to 100 (74 lb ft) + 90 degrees.
  5. Install the steering knuckle nut (1) and tighten to 40 (30 lb ft) + 120 degrees.
  6. Install the electrical harness (1) for the electronic suspension to the front lower control front link (2), if equipped.
  7. Install the front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  8. Install the underbody front air deflector. For the left side, refer to «Underbody Front Air Deflector Replacement - Left Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) . For the right side, refer to «Underbody Front Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  9. Install the engine compartment lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  10. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  11. Check and adjust the front wheel alignment specifications. Refer to «Wheel Alignment Specifications»(/cadillac/ats/i-2012-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-specifications) .

Front Lower Control Rear Link Replacement

Special Tools

J-42188 Ball Joint Separator

For regional equivalent tools, refer to Special Tools .

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Remove the engine compartment lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  4. Remove the front wheelhouse splash shield. Refer to «Front Wheelhouse Splash Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  5. Using the proper tools, loosen but DO NOT remove the steering knuckle nut (1).
  6. Use the J-42188 separator (1) to separate the front lower control rear link from the steering knuckle.
  7. Remove the steering knuckle nut (1).
  8. Remove the front lower control rear link nut (1).
  9. Remove and discard the front lower control rear link bolt (3). DO NOT reuse. Replace with NEW only.
  10. Remove the front lower control rear link (2) from the steering knuckle.
  1. Position the front lower control rear link (2) in the steering knuckle.
  2. Position the front lower control rear link (2) in the frame.
  3. Install the NEW front lower control rear link bolt (3) and nut (1).
  4. Tighten the NEW front lower control rear link bolt (3) to 100 (74 lb ft) + 90 degrees.
  5. Install the steering knuckle nut (1) and tighten to 40 (30 lb ft) + 120 degrees.
  6. Install the front wheelhouse splash shield. Refer to «Front Wheelhouse Splash Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  7. Install the engine compartment lower noise shield. Refer to «Engine Compartment Lower Noise Shield Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  8. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  9. Check and adjust the front wheel alignment specifications. Refer to «Wheel Alignment Specifications»(/cadillac/ats/i-2012-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-specifications) .

Wheel Stud Replacement

Special Tools

J-43631 Ball Joint Separator

For regional equivalent tools, refer to Special Tools .

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Remove the front brake rotor. Refer to «Front Brake Rotor Replacement (JE5)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#disc-brake-system__front-brake-rotor-replacement-je5) , «Front Brake Rotor Replacement (J55)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#disc-brake-system__front-brake-rotor-replacement-j55) .
  4. Use the J-43631 separator (1) to separate the wheel stud (2) from the front wheel bearing and hub assembly.
  5. Remove the wheel stud (2) from the front wheel bearing and hub assembly (1) and discard it.

Installation

  1. Position the NEW wheel stud (2) in the front wheel bearing and hub assembly (1).
  2. Install flat washers and an old wheel nut (2) on the wheel stud (1).
  3. Use a suitable tool to prevent the flange on the front wheel bearing and hub assembly from turning.
  4. Tighten the wheel nut (2) until the wheel stud (1) is firmly seated.
  5. Remove the wheel nut (2) and flat washers.
  6. Install the front brake rotor. Refer to «Front Brake Rotor Replacement (JE5)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#disc-brake-system__front-brake-rotor-replacement-je5) , «Front Brake Rotor Replacement (J55)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#disc-brake-system__front-brake-rotor-replacement-j55) .
  7. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Disconnect the stabilizer shaft link from the strut assembly. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/ats/i-2012-2014/remont/suspension-front/#front-suspension-system) .
  4. Disconnect the front wheel speed sensor from the steering knuckle and strut assemblies. Refer to «Front Wheel Speed Sensor Replacement»(/cadillac/ats/i-2012-2014/remont/anti-locktraction-control/#antilock-brake-system) .
  5. Disconnect the wiring harness (2) from the retainer (1) on the side of the strut assembly.
  6. Disconnect the electrical connector (3) for the electronic suspension.
  7. Disconnect the front brake hose from the strut assembly. Refer to «Front Brake Hose Replacement (JE5)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) , «Front Brake Hose Replacement (J55)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
  8. Place a reference mark (1) where the strut assembly (2) sits on the steering knuckle (3).
  9. Remove the front suspension strut nuts (1) and bolts (2).
  10. Remove the front suspension strut access hole plug (1).
  11. Remove the front suspension upper strut mount nuts (2).
  12. Remove the strut assembly (1) from the vehicle.
  1. Position the front strut assembly (1) on the vehicle.
  2. Start the front suspension upper strut mount nuts (1) by hand but do not tighten.
  3. Start the front suspension strut bolts (2) and nuts (1) by hand but do not tighten.
  4. Align the strut assembly (2) with the previously made alignment mark (1).
  5. Install the front suspension strut nuts (1) and tighten to 150 (111 lb ft) + 95 degrees.
  6. Ensure the splines on the strut bolts are fully seated.
  7. Connect the stabilizer shaft link to the strut assembly. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/ats/i-2012-2014/remont/suspension-front/#front-suspension-system) .
  8. Connect the front wheel speed sensor to the steering knuckle and strut assemblies. Refer to «Front Wheel Speed Sensor Replacement»(/cadillac/ats/i-2012-2014/remont/anti-locktraction-control/#antilock-brake-system) .
  9. Install the wiring harness (2) in the retainer (1) on the side of the strut assembly.
  10. Connect the electrical connector (3) for the electronic suspension.
  11. Connect the front brake hose to the strut assembly. Refer to «Front Brake Hose Replacement (JE5)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) , «Front Brake Hose Replacement (J55)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
  12. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  13. Lower the vehicle completely.
  14. Install the front suspension upper strut mount nuts (2) and tighten to 22 (16 lb ft).
  15. Install the front suspension strut access hole plug (1).
  16. Check and adjust the front wheel alignment. Refer to «Wheel Alignment Specifications»(/cadillac/ats/i-2012-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-specifications) .
  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Disconnect the stabilizer shaft link from the strut assembly. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/ats/i-2012-2014/remont/suspension-front/#front-suspension-system) .
  4. Disconnect the front wheel speed sensor from the steering knuckle and strut assemblies. Refer to «Front Wheel Speed Sensor Replacement»(/cadillac/ats/i-2012-2014/remont/anti-locktraction-control/#antilock-brake-system) .
  5. Disconnect the front brake hose from the strut assembly. Refer to «Front Brake Hose Replacement (JE5)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) , «Front Brake Hose Replacement (J55)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
  6. Place a reference mark (1) where the strut assembly (2) sits on the steering knuckle (3).
  7. Remove the front suspension strut nuts (1) and bolts (2).
  8. Remove the front suspension strut access hole plug (1).
  9. Remove the front suspension upper strut mount nuts (2).
  10. Remove the strut assembly (1) from the vehicle.
  1. Position the front strut assembly (1) on the vehicle.
  2. Start the front suspension upper strut mount nuts (1) by hand but do not tighten.
  3. Start the front suspension strut bolts (2) and nuts (1) by hand but do not tighten.
  4. Align the strut assembly (2) with the previously made alignment mark (1).
  5. Install the front suspension strut nuts (1) and tighten to 150 (111 lb ft) + 95 degrees.
  6. Ensure the splines on the strut bolts are fully seated.
  7. Connect the stabilizer shaft link to the strut assembly. Refer to «Stabilizer Shaft Link Replacement»(/cadillac/ats/i-2012-2014/remont/suspension-front/#front-suspension-system) .
  8. Connect the front wheel speed sensor to the steering knuckle and strut assemblies. Refer to «Front Wheel Speed Sensor Replacement»(/cadillac/ats/i-2012-2014/remont/anti-locktraction-control/#antilock-brake-system) .
  9. Connect the front brake hose to the strut assembly. Refer to «Front Brake Hose Replacement (JE5)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) , «Front Brake Hose Replacement (J55)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
  10. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/ats/i-2012-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  11. Lower the vehicle completely.
  12. Install the front suspension upper strut mount nuts (2) and tighten to 22 (16 lb ft).
  13. Install the front suspension strut access hole plug (1).
  14. Check and adjust the front wheel alignment. Refer to «Wheel Alignment Specifications»(/cadillac/ats/i-2012-2014/remont/wheel-alignment/#wheel-alignment-system__wheel-alignment-specifications) .

Suspension Strut Disposal

WARNINGUse the proper eye protection when drilling to prevent metal chips from causing physical injury.
  1. Clamp the strut in a vise horizontally with the rod (1) completely extended.
  2. Drill a hole in the strut at the center of the end cap (3) using a 5 mm (3/16 in) drill bit. Gas or a gas/oil mixture will exhaust when the drill bit penetrates the strut. Use shop towels in order to contain the escaping oil.
  3. Remove the strut from the vise.
  4. Hold the strut over a drain pan vertically with the hole down.
  5. Move the rod (1) in and out of the tube (2) to completely drain the oil from the strut.

Scheme 10

Scheme 10: Strut, Strut Component, or Spring Replacement (with electronic suspension)
Scheme 10: Strut, Strut Component, or Spring Replacement (with electronic suspension)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the strut assembly. Refer to Strut Assembly Removal and Installation (FE2 or FE3 With F55 Magnetic Ride Suspension) .
1Front Suspension Strut Nut CAUTION: Refer to Fastener Caution . Procedure Use the J-45400-A compressor to compress the strut assembly components. Use the CH-50732 socket to remove the front suspension strut nut. Tighten 48 (35 lb ft) Special Tools CH-50732 Strut Rod Nut Socket, 18 mm J-45400-A Strut Spring Compressor For regional equivalent tools, refer to Special Tools .
2Front Suspension Strut Mount
3Front Suspension Strut Mount Washer NOTE: Ensure that the smaller diameter of the front suspension strut mount washer goes up against the front suspension strut mount and the larger diameter is against the front coil spring upper seat.
4Front Coil Spring Upper Seat
5Front Coil Spring Upper Insulator
6Front Coil Spring NOTE: Do not blemish or modify the coating on the front coil spring in any manner.
7Front Suspension Strut Dust Shield
8Front Coil Spring Lower Insulator
9Front Suspension Strut
CAUTION
Refer to Fastener Caution .
NOTE
Ensure that the smaller diameter of the front suspension strut mount washer goes up against the front suspension strut mount and the larger diameter is against the front coil spring upper seat.
NOTE
Do not blemish or modify the coating on the front coil spring in any manner.

Strut, Strut Component, or Spring Replacement (with electronic suspension)

Scheme 11

Scheme 11: Strut, Strut Component, or Spring Replacement (without electronic suspension)
Scheme 11: Strut, Strut Component, or Spring Replacement (without electronic suspension)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the strut assembly. Refer to Strut Assembly Removal and Installation (FE2 Base) .
1Front Suspension Strut Nut CAUTION: Refer to Fastener Caution . Procedure Use the J-45400-A compressor to compress the strut assembly components. Use the CH-50732 socket to remove the front suspension strut nut. Tighten 60 (44 lb ft) Special Tools CH-50732 Strut Rod Nut Socket, 18 mm J-45400-A Strut Spring Compressor For regional equivalent tools, refer to Special Tools .
2Front Suspension Strut Mount
3Front Suspension Strut Mount Washer NOTE: Ensure that the smaller diameter of the front suspension strut mount washer goes up against the front suspension strut mount and the larger diameter is against the front coil spring upper seat.
4Front Coil Spring Upper Seat
5Front Coil Spring Upper Insulator
6Front Coil Spring NOTE: Do not blemish or modify the coating on the front coil spring in any manner.
7Front Suspension Strut Dust Shield
8Front Suspension Strut Bumper
9Front Coil Spring Lower Insulator
10Front Suspension Strut
CAUTION
Refer to Fastener Caution .
NOTE
Ensure that the smaller diameter of the front suspension strut mount washer goes up against the front suspension strut mount and the larger diameter is against the front coil spring upper seat.
NOTE
Do not blemish or modify the coating on the front coil spring in any manner.

Strut, Strut Component, or Spring Replacement (without electronic suspension)

Front Suspension Description and Operation

The front suspension has 2 primary purposes

  1. Isolate the driver from irregularities in the road surface.
  2. Define the ride and handling characteristics of the vehicle.

The front suspension absorbs the impact of the tires travelling over irregular road surfaces and dissipates this energy throughout the suspension system. This process isolates the vehicle occupants from the road surface. The rate at which the suspension dissipates the energy and the amount of energy that is absorbed is how the suspension defines the vehicles ride characteristics. Ride characteristics are designed into the suspension system and are not adjustable. The ride characteristics are mentioned in this description in order to aid in the understanding of the functions of the suspension system. The suspension system must allow for the vertical movement of the tire and wheel assembly as the vehicle travels over irregular road surfaces while maintaining the tire's horizontal relationship to the road.

This requires that the steering knuckle be suspended between a lower control arm and a strut assembly. The lower control arm attaches from the steering knuckle at the outermost point of the control arm. The attachment is through a ball and socket type joint. The innermost end of the control arm attached at 2 points to the vehicle frame through semi-rigid bushings. The upper portion of the steering knuckle is attached to a strut assembly. The strut assembly then connects to the vehicle body by way of an upper bearing. The steering knuckle is allowed to travel up and down independent of the vehicle body structure and frame.

This up and down motion of the steering knuckle as the vehicle travels over bumps is absorbed predominantly by the coil spring. This spring is retained under tension over the strut assembly. A strut is used in conjunction with this system in order to dampen out the oscillations of the coil spring. A strut is a basic hydraulic cylinder. The strut is filled with oil and has a moveable shaft that connects to a piston inside the strut. Valves inside the shock absorber offer resistance to oil flow and consequently inhibit rapid movement of the piston and shaft. Each end of the shock absorber is connected in such a fashion to utilize this recoil action of a spring alone. Each end of the strut is designed as the connection point of the suspension system to the vehicle and acts as the coil spring seat. This allows the strut to utilize the dampening action to reduce the recoil of a spring alone. The lower control arm is allowed to pivot at the vehicle frame in a vertical fashion. The ball joint allows the steering knuckle to maintain the perpendicular relationship to the road surface.

Front suspensions systems utilize a stabilizer shaft. The stabilizer bar connects between the left and right lower control arm assemblies through the stabilizer link and stabilizer shaft insulators. This bar controls the amount of independent movement of the suspension when the vehicle turns. Limiting the independent movement defines the vehicles handling characteristics on turns.

Special Tools

Illustration Tool Number/ Description CH-42188-B J-42188-B Ball Joint Separator CH-43631 CH-49455 J-43631 Ball Joint Separator CH-45400-A DW320-010 J-45400-A Strut Spring Compressor CH-50732 MLR-9362 Strut Rod Nut Socket, 18 mm

Scheme 12

Scheme 12: Special Tools
Scheme 12: Special Tools

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14

See also:
• Lifting and Jacking the Vehicle
• Engine Compartment Lower Noise Shield Replacement
• Front Air Deflector Replacement
• Electric Belt Drive Rack and Pinion Steering Gear Replacement (RWD Without KC4)
• Electric Belt Drive Rack and Pinion Steering Gear Replacement (RWD With KC4)
• Tire and Wheel Removal and Installation
• Engine Mount Vacuum Tank Replacement
• Fastener Caution
• Front Brake Rotor Replacement (JE5)
• Front Brake Rotor Replacement (J55)
• Front Wheel Speed Sensor Replacement
• Front Wheel Drive Shaft Replacement - Left Side
• Front Wheel Drive Shaft Replacement - Right Side
• Front Brake Shield Replacement
• Wheel Alignment Specifications
• Steering Linkage Outer Tie Rod Replacement (AWD)
• Front Brake Hose Replacement (JE5)
• Stabilizer Shaft Link Replacement
• Adhesives, Fluids, Lubricants, and Sealers
• Front Lower Control Front Link Replacement
• Front Lower Control Rear Link Replacement
• Special Tools

More articles — Suspension