Start by choosing coilover mounts that fit your car, then clean the frame rails and rearend to bare metal. Set the car at ride height, mark your mounting points, and verify alignment with a level and reference measurements. Tack the brackets in place with short welds, keeping the shock angle under 30 degrees and checking full travel for clearance. Reinforce the structure with thick tubing, then inspect the welds and geometry for any needed corrections.
Choose Coilover Mounts
Start by choosing coilover mounts that match your specific vehicle, so the brackets line up correctly with the existing suspension points and don’t force awkward fabrication. You want coilover mounts that deliver a proper fit with your chassis and coilover shocks, because mismatched parts compromise alignment and travel.
Check the mount material next: steel gives you high strength and durability, while aluminum can reduce weight and resist corrosion, but may need more care in load-bearing use. Verify the mounting angle stays under 30 degrees to preserve shock motion and avoid stiff, inefficient spring rates.
Then confirm the mounts accept your coilover’s required compression stroke and full travel. If you want freedom to tune the car, choose adjustable mounts; they let you fine-tune ride height and suspension geometry without redoing the setup. Precision here saves time, improves handling, and keeps your build controlled. Additionally, ensure your chosen mounts comply with maximum fillet weld size principles to guarantee structural integrity during installation.
Products Worth Considering
Adjustable coil over shock brackets similar to Competition Engineering 2047 or Jegs 64080.These top quality CNC Laser cut brackets give you a minimum of 6” of height adjustment in your coil overs.
Fitment： Universal weld-on shock mount brackets, for 3” diameter axle tubes, shock mount location, for most Coilover shocks
The Competition Engineering Lower Coil-Over Shock Mount Kit is designed to be used either by itself or in conjunction with C2048 Upper Coil-Over Shock Mount Kit. Machined spacers are included to adapt the mount to various coil-over shocks
Prep the Frame Rails and Rearend
Start by cleaning the frame rails and rearend completely so rust, debris, and old paint won’t compromise the weld. Mark the coilover mount locations at the intended ride height, then verify the frame rails and rearend are level and aligned. Check for any clearance issues in the weld area before you tack the mounts in place. Additionally, ensure that all zinc residues are removed from the metal surfaces to avoid complications during welding, as zinc contamination weakens weld integrity.
Mark Ride Height
Before you weld the coilover mounts, measure and mark the desired ride height on the frame rails and rearend so you’ve got a fixed reference for alignment.
Use a level to make sure the chassis sits evenly front to back and side to side before you trust any numbers. Mark the reference point clearly on the frame rails, then confirm the same height at multiple locations on the rearend.
This gives your coil-over shocks a predictable working position and keeps the suspension geometry honest. Double-check every measurement for consistency, because a small error here can lock in bad stance and poor travel.
If needed, support the parts with a jig or temporary braces while you verify alignment against the marked ride height, then move forward with confidence.
Clean Frame Rails
Scrub the frame rails and rearend with a wire brush or grinder until you’ve removed all rust, scale, dirt, and loose debris, since clean metal gives you the best weld adhesion. Use degreaser next, because oil and grease sabotage welding surface preparation and weaken welds.
| Step | Action |
|---|---|
| 1 | Apply frame cleaning techniques |
| 2 | Use rust removal methods |
| 3 | Degrease all contact zones |
| 4 | Inspect for damage or weak points |
| 5 | Mark mount locations, then re-clean them |
Check the cleaned steel for cracks, gouges, or thin spots and repair anything suspect before welding. Mark the coilover mount points on the rails, then verify your measurements against the desired suspension geometry and ride height. Wipe the marked areas again so no contamination remains. Clean metal, accurate marks, and disciplined prep give you the strongest path to freedom from rework and failure.
Check Rearend Alignment
With the frame rails and rearend cleaned up, level the vehicle front-to-back and side-to-side so you can check rearend alignment accurately before any welds go in.
Use measuring tools to mark fixed reference points on the frame rails and housing, then compare both sides with the same alignment techniques.
Set the rearend at ride height so the suspension geometry stays true and the shock mounts land where you need them.
Measure the inside width of the frame rails to confirm your cross member tube will fit securely without forcing anything.
If the numbers drift, stop and correct them now; troubleshooting misalignment is easier before heat locks the setup in place.
Triple-check every dimension, angle, and centerline before you strike an arc.
Mark Ride Height and Mount Points
Set the vehicle at its intended ride height with the full weight on the suspension, then use a level to mark that height on the frame.
Mark the shock centerlines and rearend mount points so each side stays even and the coilovers sit at the correct working angle.
Verify the mount alignment against the suspension geometry before you weld anything, and label every mark clearly. Ensure that the aluminum is properly cleaned to avoid porosity in welds during the welding process.
Set Ride Height
Level the vehicle front to back and side to side before you mark anything, so you’re working from a consistent ride height. Measure from fixed chassis points to the floor, then set your target with a tape measure that matches the vehicle’s specs and your performance goals.
This is where ride height adjustments shape suspension tuning and performance optimization, so be exact. Mark each coilover mount location on the frame, and record the angle and alignment that let the suspension move freely through its travel.
Recheck every dimension and witness mark before you commit. If a measurement drifts, correct it now; small errors change handling later.
Once everything matches, label the mount points clearly so you can weld with confidence and keep your reference intact.
Mark Shock Centers
Mark the shock centers at ride height before you commit to any mount points, because that reference controls how the coilovers will work in motion. Measure your ride height, then use a plumb line or level to find each shock center and transfer those points to the frame.
Keep the marks symmetrical side to side so your suspension geometry stays consistent and the car moves free and true. Check the shock angle as you mark; staying under 30 degrees helps preserve effective damping characteristics across different shock absorber types.
Lay out clear reference marks for the upper and lower mounts, then compare both sides again. Before you weld anything, verify every measurement and center mark.
Precision here saves you from rework and keeps your setup aligned with the liberation you want from the chassis.
Verify Mount Alignment
Before you weld, mark the vehicle’s ride height and verify each coilover mount point with accurate measurements so the suspension geometry stays where it should.
Use alignment tools to locate the frame points, then measure from fixed references so both sides match.
Keep your mounting techniques clean and deliberate: the shock mounts should sit parallel to the suspension components, not fight them. That prevents binding, preserves travel, and lets the car move freely instead of forcing a compromised setup.
Triple-check every mark before you strike an arc. If the numbers drift, correct them now, not after welding locks in a bad position.
Record the ride height, dimensions, and mount locations so you can repeat the setup with confidence and keep your build honest.
Tack Weld the Coilover Mounts
Position the coilover mounts at the correct angle and alignment, then secure and mark them so they stay in place while you tack weld. Use short, controlled tack welds to lock each mount without flooding the joint with heat. This heat management matters, because excessive input can pull the mount off line and distort the structure you’ve freed to move. Apply consistent tack welding techniques: keep your travel speed, arc length, and hand motion steady so each tack builds evenly across the surface.
After every tack, stop and make alignment checks against your marks and reference points. If anything shifts, correct it now, not later. Keep the tacks small and spaced to hold position while limiting warping. Regularly inspect and clean the liners to avoid blockages that could interfere with your welding.
Once you’ve placed all tacks, let them cool completely before you commit to full welding. That pause preserves joint integrity and gives you a stable foundation for the next step.
Products Worth Considering
HEAVY-DUTY STEEL CONSTRUCTION: Manufactured from 1/4 inch raw steel, this flat shock mount bracket is designed for durability and consistent performance. Ideal for weld-on suspension setups, it provides a solid mounting solution for shock absorbers and coilovers in off-road, racing, and custom vehicle builds.
Coil-over shock mounting bracket is a wide flat mount model and is a weld-on style
Coil-over shock mounting bracket is a narrow radius mount model and is a weld-on style
Set Coilover Angle and Travel
Set the coilover so its working angle stays under 30 degrees whenever possible, since steeper mounting reduces damping effectiveness and usually demands a stiffer spring to keep the rate in range.
You’ll want the coilover geometry to follow the suspension’s natural arc, because that keeps suspension dynamics predictable and the damping characteristics consistent through travel.
Cycle the suspension by hand or with the spring removed, and confirm the shock stays near a 90-degree relationship to the link arms at full compression. That alignment prevents bind, reduces side loading, and lets the wheel move freely over bumps and droop.
Check the mount through the full stroke, not just at ride height, and watch for any interference, misalignment, or changing leverage. If the angle grows too steep, adjust the pickup point before you weld final, because the wrong setup’ll fight the car and compromise control. Additionally, ensure that the heat-affected zone is minimized during welding to maintain the integrity of the coilover mounts.
Reinforce the Frame and Crossmember
Reinforce the frame and crossmember with box tubing at least 1/8 inch thick so the coilover mounts have a rigid structure to work against.
Use frame reinforcement techniques that tie the load into sound metal, and add plate around the mounts to spread stress instead of letting it concentrate at one point.
Before you strike an arc, follow welding preparation tips: remove rust, paint, oil, and debris until the metal’s clean and bright.
Set the crossmember at ride height, because crossmember positioning strategies depend on keeping suspension geometry true while you weld.
Set the crossmember at ride height so suspension geometry stays true while you weld.
Tack it first, check that it sits level, and leave yourself room to make small corrections before you fully weld it in place.
When you reinforce both sides of the structure, you create a stiffer, safer foundation that won’t surrender under hard driving. Additionally, ensure you wear appropriate PPE to protect yourself from potential hazards during the welding process.
Work carefully, measure twice, and let the chassis stay free to move the way you intended.
Test Clearance and Inspect Welds
Once the welds cool, check the full suspension travel for clearance so nothing contacts or binds at any point in motion. Move the suspension through compression and rebound, and watch how your coilover mounts behave under real suspension dynamics. Use a caliper or tape to confirm even alignment and ride height specs. Inspect each weld with a sharp eye for gaps, discoloration, or shallow penetration; those signs point to weak points that your welding techniques missed. Additionally, ensure that the welds adhere to AWS D1.6:2017 standards for optimal quality and safety.
| Check | Result |
|---|---|
| Full travel | Clear |
| Alignment | Even |
| Weld face | Sound |
| Penetration | Adequate |
| Binding | None |
If you find interference, adjust the mount before driving. Pay close attention to material selection, since thin sections can distort and change fit. Document every measurement, correction, and observation so you’ve got a solid record for future safety checks and repeatable performance.
Frequently Asked Questions
Can You Weld Suspension Mounts?
Yes, you can weld suspension mounts if you use proper welding techniques, protect nearby parts, and verify alignment. You’ll gain coilover benefits and stronger suspension upgrades, but you must inspect every weld for structural integrity.
What Kind of Welder Do I Need to Weld on a Car?
You’ll want a MIG welder for most car work, like a steady torch under the hood. It’s the easiest; TIG welding advantages suit fine work. Follow MIG welding basics and welder safety tips.
Can You Weld Coil Springs?
No, you shouldn’t weld coil springs; heat can weaken them. You’ll compromise coil spring types, coil spring installation, and coil spring maintenance. Use spacers or approved adapters instead, and consult a qualified suspension technician before modifying anything.
Can a Shock Absorber Be Welded?
No, you generally shouldn’t weld a shock absorber itself. You can weld only the external housing on some shock absorber types, using controlled welding techniques, after removing internals during suspension modifications to avoid heat damage.
Conclusion
With your coilover mounts tacked, angled, and reinforced, you’ve built a setup that can handle real load and suspension travel. Don’t worry if the welding looks intimidating; careful prep, correct ride height, and solid gusseting make the job manageable. Now recheck clearance through full droop and compression, then inspect every weld for uniform penetration and fit. If everything stays true, you’re ready to finish assemble and safely put the car back on the ground.
