Grand Caravan V6-4.0L (2008)
Alignment: Service and Repair
Curb Height Measurement
CURB HEIGHT MEASUREMENT
Wheel alignment is to be checked and all alignment adjustments made with the vehicle at its required curb height specification.
Vehicle height is to be checked with the vehicle on a flat, level surface, preferably a vehicle alignment rack. The tires are to be inflated to the
recommended pressure. All tires are to be the same size as standard equipment. Vehicle height is checked with the fuel tank full of fuel, and no
passenger or luggage compartment load.
Vehicle height is not adjustable. If the measurement is not within specifications, inspect the vehicle for bent or weak suspension components. Compare
the parts tag on the suspect coil spring(s) to the parts book and the vehicle sales code, checking for a match. Once removed from the vehicle, compare
the coil spring height to a correct new or known good coil spring. The heights should vary if the suspect spring is weak.
NOTE: Prior to reading the curb height measurement, the front and rear of the vehicle must be jounced to settle the suspension. Induce jounce
by pushing down on the center of the bumper (fascia), using care not to damage the vehicle, moving the vehicle up and down, gradually
increasing the suspension travel with each stroke. Release the bumper at the bottom of each stroke, repeating this action several times. Perform
this to both front and rear suspensions an equal amount of times.
Measure curb height as follows:
1. Jounce the vehicle. Refer to above note.
2. Front - On each side of the vehicle, measure the distance (2) from the center of the lower control arm front mounting bolt (1) to the floor or
alignment rack/lift runway surface. It may be necessary to measure to the bottom of a straight edge (3), placed from lift runway to runway, to get
an accurate measurement.
3. Rear Left- Measure the distance (5) from the track bar mounting bracket (1) outboard mounting flange to the floor or alignment rack/lift runway
surface. It may be necessary to measure to the bottom of a straight edge (4), placed from lift runway to runway, to get an accurate measurement.
4. Rear Right - Measure the distance (3) from the frame rail cross-brace (2) outboard of the exhaust shield to the floor or alignment rack/lift runway
surface. It may be necessary to measure to the bottom of a straight edge (4), placed from lift runway to runway, to get an accurate measurement.
5. Compare the measurements to specifications listed in the following CURB HEIGHT SPECIFICATIONS chart. Maximum left-to-right
differential is not to exceed 12.5 mm (0.5 in.).
6. If curb height is found to be out of specification and there is no sign of excessive body damage, curb height can be changed by replacing the
applicable spring with a spring offering a different check load.See: Suspension/Suspension Strut / Shock Absorber/Service and Repair/Front Strut /
Shock/Removal
