Curb Height Measurement - ACR

CURB HEIGHT MEASUREMENT - ACR

NOTE: This procedure is designed to be performed with original factory wheels and tires installed. Non-OEM wheel or tires may cause inaccurate measurement.

1. Verify vehicle fuel tank is full of fuel. If tank is not full of fuel, reduction in weight will affect height of vehicle and design height measurement.
2. Remove any load within passenger and luggage compartments that is not factory equipment.
3. Place vehicle on wheel alignment rack or drive-on lift per equipment manufacturer's recommendations.
4. Check all tires for proper inflation pressure and adjust as necessary.
5. Place a straightedge from lift runway to runway directly below the wheel center line for both front and rear axles. If a straightedge cannot be located, Height Gages, Special Tool 6914, can be used. Do not attempt to place Height Gages on wheel flanges, only across lift runways as indicated here.
6. Jounce vehicle several times, each time paying special attention to release vehicle at very bottom of jounce cycle. This is very important in allowing suspension to settle to correct height.




7. Measure and record vehicle's front design height. Measure distance (1) straight up from bottom of straightedge (4) to each frame rail at the nearest point to the Principle Locating Point (PLP) hole (2).





8. Measure and record vehicle's rear design height. Measure distance (1) straight up from bottom of straightedge (4) to each frame rail at the nearest point to the Principle Locating Point (PLP) hole (2) (not belly pan).

NOTE: Following inspection and any correction made, measure vehicle's DESIGN HEIGHT. Service and Repair

NOTE: Due to the extreme stiffness of the rubber used in this vehicles suspension component bushings, curb height can be affected if any rubber bushing used in the suspension is not tightened and torqued with vehicle at DESIGN HEIGHT.

9. Compare recorded measurements to specifications Wheel Alignment. If vehicle's curb height does not meet specifications, one of the following could be at fault:
a. A suspension component could be damaged or worn excessively. Inspect all suspension components for damage or wear paying special attention to the following:
- Coil springs
- Shock assembly mounting bushings
- Upper and lower control arm mounting bushings
- Front and rear sway bar
- Possible damage to the vehicle' frame which affects the mounting location of any suspension component.

b. Rubber bushing mounted suspension components may not be properly positioned and tightened at mounting locations. To correct this, Service and Repair