How to Adjust KW Coilover Height Safely and Check Ride Height

Step 1 Confirm the KW kit and read its adjustment limits

Find the KW part number, vehicle application, and installation instructions before lifting the car. The part number may be printed on the packaging, paperwork, damper label, or a registration document. The manual identifies whether your kit uses lower-mount adjustment, a threaded spring seat, or another arrangement, and it states the permitted height range and minimum thread engagement.

Look at the installed coilover without moving it. Identify the spring, spring perch, perch lock ring, threaded body or sleeve, lower mount, and lower-mount lock collar. If the lower mount is seized, the threads are damaged, the spring is not seated, or you cannot determine which collar is the lock collar, stop rather than forcing the assembly.

Step 2 Prepare the car and establish a repeatable baseline

Park on a level, hard surface and set the tire pressures to the normal cold pressures listed for the vehicle. Remove unusually heavy cargo, keep the fuel level reasonably consistent, and make sure the same occupants or ballast are used for later comparisons. A different load can change the measured height enough to confuse the adjustment.

Before lifting the vehicle, roll it forward and backward or drive it a short distance so the suspension settles naturally. Do not measure immediately after raising one end with a jack. Record the height at all four corners, preferably from the center of the wheel hub vertically to the fender edge.

This method reduces errors caused by tire diameter and wheel design.

You can also record the distance from the ground to the fender edge, but hub-to-fender measurements are usually more useful when comparing changes. Write down the location and value for each corner, such as left front and right rear, and photograph the exposed threads and collar positions. Marking a reference point on the collar is helpful, but the measurement is the meaningful baseline.

Step 3 Lift and support the vehicle with the suspension unloaded

Chock the wheels that stay on the ground, loosen the wheel fasteners slightly if necessary, and lift the vehicle using the manufacturer’s approved jacking points. Support it with jack stands at strong structural support points, then give the car a careful stability check before removing the wheels.

Lift the complete axle when practical. If one wheel hangs while the other side remains loaded, the anti-roll bar can place unwanted load through the suspension and make collar adjustment difficult. Follow the vehicle service procedure if a brake hose, sensor wire, or other component limits how far the suspension can droop.

Remove the wheel only after the vehicle is securely supported. Clean loose dirt from the accessible threads with a soft brush. Avoid aggressive wire brushing that could damage protective coatings, and do not spray lubricant onto a surface where it could reach the brake disc or pads.

Step 4 Free the correct lock collar and mark the starting position

Use the KW spanner to loosen the lock collar specified by the manual. Hold the adjacent component so force is not transferred through the damper rod or through a thin spring perch. A small amount of penetrating fluid may help with an externally dirty thread, but it is not a substitute for the correct wrench or a safe disassembly method.

Mark the starting position of the lower mount, lock collar, and a fixed point on the threaded body. Also note the exposed thread length or count the visible turns if the manual permits that as a reference. These marks do not replace the manufacturer’s minimum-engagement requirement, but they make it easier to return to the original setting.

If the collar will not move with reasonable hand-tool force, stop. Hammering directly on aluminum collars can deform them, and using an impact wrench can damage the threads or spin internal components. A seized or damaged coilover is a repair issue, not a sign that more force is appropriate.

Step 5 Adjust the lower mount in small, equal increments

On a KW design that uses lower-mount height adjustment, rotate the lower mount on the threaded body in the direction identified by the manual. Make a small change at one corner, then make the same change on the opposite corner of that axle. Counting turns or measuring exposed thread helps keep the pair consistent.

The amount of height change at the wheel is not always identical to the amount the mount moves because suspension geometry creates a motion ratio. For that reason, do not assume one full turn equals a particular number of millimeters at the fender. Adjust, reassemble enough to settle the car, and measure the actual result.

Keep the spring seated in its upper and lower isolators throughout the adjustment. The spring should not be loose when the suspension is fully extended unless the KW instructions explicitly allow that condition. If the spring becomes unseated, the mount reaches the end of its range, or the available thread engagement looks inadequate, return the assembly to a safe position and consult KW or a qualified suspension technician.

Step 6 Lock the adjustment and reinstall the wheels

Once the mount is at the intended preliminary setting, tighten the correct lock collar against the mating surface. Use the torque values and tightening method in the KW and vehicle instructions. Some collars are secured by contact between two threaded pieces, while other hardware may use a separate fastener; do not substitute a generic tightening method.

Inspect both sides of the axle before reinstalling the wheels. Confirm that the left and right settings are comparable, the springs are centered, no brake line or ABS wire is stretched, and the damper body is not contacting a control arm, knuckle, or driveshaft. Check that the tires will clear the spring, collar, and inner wheel area through the available steering range.

Install the wheels and tighten the wheel fasteners by hand. Lower the car carefully until the tires touch the ground, then torque the wheel fasteners in the vehicle manufacturer’s specified sequence and value. Do not use the wheel fastener torque as a substitute for the coilover collar torque.

A useful way to approach how to adjust kw coilover height is to check your progress after each stage.

Step 7 Settle the suspension and measure the new height

Roll the car forward and backward several feet, or drive slowly over a smooth private surface, so the suspension can settle. Avoid hard braking, cornering, or uneven ground during this check. Measure from the same hub center to fender points used for the baseline, with the same tire pressures and load.

Compare the new numbers by corner and by axle. If the car moved less or more than expected, use the measurement rather than relying on visual judgment. A level-looking fender gap does not prove that the chassis is at the intended height, because body panels, tire sizes, and factory corner weights can differ.

If the adjustment is not correct, raise and support the car again before changing anything. Do not try to rotate an accessible collar with the vehicle’s weight on the suspension unless the specific KW instructions explicitly approve that method. Repeat small, matched adjustments and settle the car after each meaningful change.

Step 8 Inspect travel, clearance, and fasteners before driving normally

Turn the steering from lock to lock while observing the front tires and coilovers. Check for contact between the tire, spring, damper, brake hose, ABS wiring, sway-bar link, and nearby bodywork. At the rear, inspect clearance around the tire, spring, damper, and inner fender.

Look underneath for reduced ground clearance and confirm that the exhaust, underbody panels, jacking points, and other low components remain usable. A lower ride height can also change the angle of suspension links and driveshafts. If the vehicle uses height-sensitive electronic systems, headlights, or driver-assistance sensors, follow the vehicle-specific recalibration requirements.

Finally, check that all wheel fasteners, coilover lock collars, and any removed brackets are secure. Take a short, slow test drive on a familiar road, listening for clunks or rubbing. Return immediately if the car pulls sharply, a tire contacts the body, the steering feels abnormal, or a warning light appears.

Height adjustment versus spring preload

Spring preload is the amount a spring is compressed in the installed, unloaded assembly before the vehicle’s weight is applied. Changing preload can alter how much the spring remains compressed at full droop and can affect available travel. It may be part of a setup procedure on some kits, but it is not automatically the correct way to change ride height.

With a lower-mount-adjustable system, the spring perch is generally kept in the position specified by KW while the lower mount is moved. This preserves the intended relationship between spring seating and damper travel more effectively than randomly winding the perch up or down.

Why suspension travel matters

Lowering the car reduces the distance available before a bump stop or another component limits compression. Raising it too far can reduce droop travel or move the vehicle outside the intended geometry. The visual result may be acceptable while the suspension repeatedly hits its stops on ordinary roads.

Watch for symptoms such as harsh impacts over small bumps, a wheel lifting over uneven corners, rubbing during compression, or a damper reaching the end of its stroke. These signs require more than another collar adjustment. Recheck the approved height range, bump-stop condition, spring seating, and damper travel before continuing.

When an alignment or corner balance is needed

Changing ride height changes suspension geometry, including camber and toe. Even a modest adjustment can affect tire wear and steering stability, especially on a vehicle with limited factory adjustment. Have the alignment checked after the final ride height is established rather than aligning the car and then changing its height again.

A four-wheel alignment corrects wheel angles; it does not necessarily equalize the weight carried at each corner. If the goal is balanced handling for track use, a specialist can perform a corner balance with the driver and intended fuel load. That procedure may change individual corner heights, so it should be completed before the final alignment.

Can the collars be adjusted with the wheels installed?

Sometimes the hardware is accessible, but access does not mean the method is approved. The suspension may be loaded, the wrench may not engage fully, and turning one side without a matching reference can produce an inaccurate setup. Removing the wheel and supporting the vehicle as directed is the safer general method.

What if the left and right ride heights were different before adjustment?

First repeat the baseline measurement on level ground with consistent tire pressure and load. Small differences can result from corner weight, fuel-tank placement, the driver’s position, or body variation. Larger differences may indicate a bent component, worn bushing, damaged spring, or an incorrect previous adjustment, so do not correct them by guessing.

When should a professional take over?

Seek qualified help if you cannot identify the adjustment parts, cannot verify the minimum thread engagement, find damaged or seized threads, see a loose spring, or discover contact with a brake or steering component. Also use a specialist for corner balancing, motorsport setup, or any job requiring damper disassembly.