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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:

    •  Set the tyre pressure to the specifications shown on the certification label. Refer to Tire Inflation Description .
    • Check the fuel level. Add additional weight if necessary to simulate a full tank.
    • Make sure the passenger and rear compartments are empty, except for the spare tyre.
    • Make sure the vehicle is on a flat and level surface, such as an alignment rack.
    • Check that all the vehicle doors are securely closed.
    • Check that the vehicle bonnet and rear deck lids are securely closed.
    • Check for installed after market accessories or modifications that could affect trim height measurement.

Measuring the Trim Height

Note: All dimensions are measured vertical to the ground. Trim height should be within ±10 mm (±39 in) to be considered correct.


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    Note: The vehicle must be on a flat level surface.

  1. Using your hands, lift the front bumper approximately 38 mm (1.49 in).
  2. Gently remove your hands and allow the vehicle to lower.
  3. Using your hands, bounce the front of the vehicle downward approximately 38 mm (1.49 in).
  4. Gently remove your hands and allow the vehicle to rise.
  5. Measure and note the C dimension. This height is measured vertically from the ground to the bottom lip of the wheel opening through the centreline of the front wheel.
  6. Measure and note the A dimension for the left and right side of the vehicle from the bottom of the front wheel rim to the wheel arc along the centreline of the front wheel.
  7. Compare the A and C dimension measurements to the trim height specifications. Refer to Trim Height Specifications .
  8. If the measurements are not within the specified range, replace the front coil springs as required. Refer to Strut, Strut Component, or Spring Replacement .
  9. Using your hands, lift the front bumper approximately 38 mm (1.49 in).
  10. Gently remove your hands and allow the vehicle to lower.
  11. Using your hands, bounce the front of the vehicle downward approximately 38 mm (1.49 in).
  12. Gently remove your hands and allow the vehicle to rise.
  13. Measure and note the C dimension. This height is measured vertically from the ground to the bottom lip of the wheel opening through the centreline of the rear wheel.
  14. Measure and note the B dimension for the left and right side of the vehicle from the bottom of the rear wheel rim to the wheel arc along the centreline of the rear wheel.
  15. Compare the B and D dimension measurements to the trim height specifications. Refer to Trim Height Specifications .
  16. If the measurements are not within the specified range, replace the rear coil springs as required. Refer to Rear Spring Replacement .
   


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