DNA Motoring Coilovers Sagging After Install? Here’s the Fix
You’ve just installed your new DNA Motoring coilovers, set the ride height exactly where you want it, and taken the car for a test drive. A week later, the car sits lower than before — sometimes by half an inch or more. Coilovers sagging after install is one of the most common frustrations we hear about, and the good news is that it’s usually fixable with a few adjustments.
This guide walks through why brand-new suspension settles, how to tell the difference between normal compression and a real problem, and the exact steps to restore your intended ride height.
Why New Coilovers Settle Lower Than Your Initial Setting
Every coilover spring compresses slightly under load during the first few hundred miles, even when preload and damper settings are correct. The spring wire seats into the perch threads, rubber bushings compress to their working thickness, and the shock body settles into its stroke range. Coilover systems with adjustable spring perches rely on thread engagement to hold preload, and that engagement tightens naturally as the vehicle’s weight cycles the suspension through normal driving.
This settling is not the same as a blown damper or a weak spring — it’s mechanical break-in. Most DNA Motoring coilover kits drop between 0.25 and 0.5 inches during the first 200–500 miles, then stabilize. If your car continues to sag after that period, the issue is usually improper preload or a component that wasn’t tightened to spec during installation.
How to Check and Adjust Preload to Stop Further Sagging
Preload is the amount of spring compression applied before the suspension even begins to move. Too little preload lets the spring rattle in the perch under rebound; too much binds the damper and limits droop travel. The correct preload for most DNA Motoring coilovers is between 3mm and 8mm, measured as the gap between the lock collar and the spring perch when the car is on the ground.
Measuring Current Preload
Jack the car and remove the wheel. Locate the lock collar at the top of the spring perch. Use a caliper or feeler gauge to measure the gap between the collar and the perch body. If the gap is larger than 10mm, the spring has lost its seated position and will continue to settle. If there’s no gap at all, the spring is over-compressed and the damper cannot extend fully.
Adjusting the Perch
Loosen the lock collar with a spanner wrench. Rotate the spring perch clockwise to raise ride height (adding preload) or counterclockwise to lower it (reducing preload). Each full turn typically changes height by 1–2mm. Tighten the lock collar snugly against the perch threads once you reach your target, then recheck the measurement after the car is back on the ground and settled.
When Sagging Indicates a Real Problem Instead of Normal Settling
If your coilovers continue to drop after preload is set correctly and the lock collars are tight, one of three things is usually happening. First, the damper body may have lost oil through a blown seal — you’ll see fluid residue around the shaft or at the bottom of the shock body. Second, the spring itself may be defective or under-spec for the corner weight of your vehicle. Third, the mounting hardware may be loose or incorrectly torqued, allowing the entire assembly to shift in the chassis.
DNA Motoring coilover kits include spring rates and damper valving tuned to each vehicle platform, so a correctly installed kit shouldn’t exhibit progressive sagging beyond the initial break-in period. If you’re still losing height after 500 miles, pull the assembly and inspect the damper for leaks, check that the spring wire diameter matches the spec sheet, and verify that all top-mount bolts are torqued to the manufacturer’s specification.
Corner Balancing and Ride Height After Initial Adjustment
Once you’ve corrected preload on all four corners, the car’s stance may still look uneven because weight distribution varies front to rear and side to side. Corner balancing — adjusting each coilover independently to level the chassis — is the final step in dialing in ride height.
Park the car on a flat surface with half a tank of fuel and typical cargo. Measure from the ground to the fender lip at each wheel, then adjust the spring perches to bring all four corners within 5mm of each other. This process can take multiple iterations, especially if fender clearance and wheel fitment are tight. Recheck all measurements after each test drive, and retorque the lock collars once the height stabilizes.
Getting Your Ride Height Dialed In and Keeping It There
Coilovers sagging after install is almost always a temporary issue, not a sign that the kit is defective. The first step is confirming that initial settling has finished — give the suspension at least 200 miles before making final adjustments. Once that break-in period is over, set preload correctly on all four corners, torque the lock collars, and measure ride height on level ground.
If sagging persists beyond normal settling, inspect for leaking dampers, loose hardware, or springs that don’t match the kit’s spec sheet. Most height issues resolve with proper preload adjustment and a corner balance, and once the system is dialed in, it stays there. Get an alignment after your final adjustment to make sure geometry is correct, and you’ll have the stance and handling you installed the coilovers for in the first place.
Common Questions About Coilover Settling and Adjustment
Most coilover kits settle 0.25 to 0.5 inches during the first 200–500 miles as springs seat into the perches and bushings compress. This is mechanical break-in, not a defect. If the car continues to drop after that period, check preload and lock collar torque.
Tightening the lock collar won’t change ride height or preload — it only prevents the perch from rotating. To raise the car, you need to loosen the lock collar, rotate the spring perch clockwise to add preload, then retighten the collar. Over-tightening without adjusting the perch can strip threads or bind the damper.
Uneven settling usually means that corner’s preload was set lower than the rest, or the lock collar wasn’t fully tightened. Adjust that corner’s spring perch independently to match the height of the others. If the same corner keeps dropping after adjustment, inspect the damper for leaks or a weak spring.
Yes. Any change in ride height alters suspension geometry and toe, camber, and caster angles. Have the alignment checked after your final height adjustment and again after 500 miles to account for any remaining settling.
Snug it firmly by hand using a spanner wrench, then add about a quarter turn. The collar should not spin freely, but you don’t need to reef on it — over-torquing can deform the perch threads or crack the collar. Recheck tightness after every 100 miles during the break-in period.
If the spring is loose on the perch, it will continue to settle and eventually rattle under rebound. Correct preload keeps the spring seated and stable. Once you’ve set it properly and the suspension has broken in, height should remain consistent unless a component fails.