Buick Enclave manuals

Buick Enclave: Suspension General Diagnosis

Buick Enclave 2008-2017 Service Manual / Suspension / Suspension General Diagnosis

SPECIFICATIONS

TRIM HEIGHT SPECIFICATIONS

D and Z Trim Height

Buick Enclave. Suspension General Diagnosis

P and R Trim Height

Buick Enclave. Suspension General Diagnosis

DIAGNOSTIC INFORMATION AND PROCEDURES

SYMPTOMS - SUSPENSION GENERAL DIAGNOSIS

IMPORTANT: The following steps must be completed before using the symptom tables.

Review the system description and operation in order to familiarize yourself with the system functions. Refer to the appropriate description and operation:

Visual/Physical Inspection

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

RIDE DIAGNOSIS

Ride Diagnosis

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

VEHICLE LEADS/PULLS

Vehicle Leads/Pulls

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

BODY LEANS OR SWAYS IN CORNERS

Body Leans or Sways in Corners

Buick Enclave. Suspension General Diagnosis

SUSPENSION BOTTOMS

Suspension Bottoms

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

TORQUE STEER

Torque Steer

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

MEMORY STEER

Memory Steer

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

NOISE DIAGNOSIS - FRONT SUSPENSION

Noise Diagnosis - Front Suspension

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

NOISE DIAGNOSIS - REAR SUSPENSION

Noise Diagnosis - Rear Suspension

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

FRONT BALL JOINT INSPECTION

Special Tools

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.

IMPORTANT:

2. Clean and inspect the ball joint seal for cuts or tears. If the ball joint seal is damaged, replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement.

3. Support the lower control arm with a floor stand as far outboard as possible and raise the suspension to just below ride height.

4. Install J 8001 Dial Indicator Set or a suitable dial indicator in a way to measure vehicle lash in the ball joint.

Buick Enclave. Suspension General Diagnosis
Fig. 1: Measuring Vertical Lash In Ball Joint

5. Gently lift or pry the suspension to induce ball joint movement.

IMPORTANT: Do not pry between the lower control arm and the wheel drive shaft boot.

6. If the dial indicator reading is more than 0.5 mm (0.020 in), replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement.

SUSPENSION STRUT AND SHOCK ABSORBER TESTING - ON VEHICLE

Suspension Strut and Shock Absorber Testing - On Vehicle

Buick Enclave. Suspension General Diagnosis

WHEEL BEARINGS DIAGNOSIS

Wheel Bearings Diagnosis

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

Buick Enclave. Suspension General Diagnosis

TRIM HEIGHT INSPECTION

Trim Height Measurement

Trim height is a predetermined measurement relating to vehicle ride height. Incorrect trim heights can cause the vehicle to bottom out over bumps, damage to the suspension components and symptoms similar to wheel alignment problems. Check the trim heights when diagnosing suspension concerns and before checking the wheel alignment.

Perform the following before measuring the trim heights:

Measuring the Z Height

Buick Enclave. Suspension General Diagnosis
Fig. 2: Measuring Z Height Dimension

IMPORTANT:

Use the following procedure to measure the Z height:

1. Lift the front bumper of the vehicle up about 38 mm (1.5 in).

2. Gently remove your hands and let the vehicle settle.

3. Repeat this operation 2 more times for a total of 3 times.

4. Repeat this jouncing operation 2 more times for a total of 3 times.

5. Measure from the center of the lower ball joint (outer) 2 to the center of the lower control arm bolt (inner) 1.

6. Push the front bumper of the vehicle down about 38 mm (1.5 in).

7. Gently remove your hands and let the vehicle settle.

8. Repeat this operation 2 more times for a total of 3 times.

9. Re-measure the Z height as in step 5.

10. The true Z height is the average of the measurements taken in steps 5 and 8. Refer to Trim Height Specifications.

If any of these measurements are out of specifications, inspect for the following conditions:

Measuring the D Height

Buick Enclave. Suspension General Diagnosis
Fig. 3: Measuring D Height Dimension

IMPORTANT:

Use the following procedure to measure the D height:

1. Lift the rear bumper of the vehicle up about 38 mm (1.5 in).

2. Gently remove your hands and let the vehicle settle.

3. Repeat this operation 2 more times for a total of 3 times.

4. Use the outer flat spot 2 on the knuckle as the reference point for the D height measurement.

5. Measure from the outer on the knuckle to the center of the lower control arm bolt (1).

6. The difference between these 2 measurements is the D height.

7. Lift the rear bumper of the vehicle up about 38 mm (1.5 in).

8. Gently remove your hands and let the vehicle settle.

9. Repeat this operation 2 more times for a total of 3 times.

10. Re-measure the D height as in step 4.

11. The true D height is the average of the measurements taken in steps 4 and 8. Refer to Trim Height Specifications.

If any of these measurements are out of specifications, inspect for the following conditions:

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS

J 8001
Dial Indicator

Buick Enclave. Suspension General Diagnosis

J 39570
Chassis Ear

Buick Enclave. Suspension General Diagnosis

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