How To Put Spoiler On Car

So, you're thinking about adding a spoiler to your car, or maybe you've already got one and need to replace it. It's a common modification, and when done right, it can really enhance your car's appearance and, in some cases, even improve its handling. However, a poorly installed spoiler can be a disaster, leading to damage, vibrations, and even detachment at highway speeds. This guide will walk you through the process, ensuring a secure and aesthetically pleasing installation.

The Problem: Getting a Spoiler Right

Adding a spoiler to your car seems straightforward, but it involves more than just slapping it on. A properly installed spoiler should be securely mounted to the vehicle, flush with the body, and not cause any unwanted vibrations or noises. Getting it wrong can lead to a number of issues, from a wobbly spoiler to potential damage to your car's paint and bodywork.

Why is a Properly Installed Spoiler Important?

A spoiler isn't just for looks. While aesthetics are a big part of it for many, a spoiler is designed to improve aerodynamics. A properly designed and installed spoiler can reduce lift at higher speeds, improving traction and stability, particularly at the rear of the vehicle. A poorly installed spoiler can actually increase drag or even create dangerous instability. Think of it like an airplane wing – you wouldn’t want that improperly attached! More immediately, an unsecured spoiler can detach at speed, posing a hazard to yourself and other drivers.

Symptoms of a Poorly Installed Spoiler

Before you start, it's crucial to recognize the signs of a poorly installed or failing spoiler. Catching these issues early can prevent more significant problems down the road:

Spoiler Wobbling or Shaking: This is perhaps the most obvious symptom. If the spoiler moves excessively, especially at higher speeds, it's a clear indication that the mounting isn't secure.
Unusual Noises: Rattling, whistling, or flapping sounds coming from the rear of the car, especially at speed, can indicate a loose or improperly installed spoiler.
Visible Gaps or Misalignment: The spoiler should sit flush against the body of the car. Any noticeable gaps or misalignment suggest an issue with the installation.
Damaged Paint Around Mounting Points: If you see scratches, chips, or cracks in the paint around where the spoiler is attached, it's a sign that the installation process may have been flawed or that the spoiler is putting undue stress on the surrounding area.
Loose Hardware: Check the bolts, screws, or adhesive used to secure the spoiler. If any of these are loose or missing, it’s a sign of a problem.
Vibrations Transmitted to the Car: In some cases, a poorly installed spoiler can transmit vibrations into the car's body, which you might feel through the seats or steering wheel.
Water Leaks: If the spoiler wasn't properly sealed during installation, water can leak into the trunk or body of the car.

Root Causes of Spoiler Problems

Several factors can contribute to a poorly installed or failing spoiler. Understanding these root causes is essential for preventing problems:

Incorrect Mounting Technique: Using the wrong type of fasteners, failing to drill holes properly, or not using the correct sealing compounds can all lead to an insecure installation. Often, generic bolts are used when specific, tapered bolts are needed to distribute pressure correctly.
Inadequate Surface Preparation: The surface of the car must be clean and free of dirt, grease, and wax before attaching the spoiler. Failure to do so can prevent proper adhesion.
Using the Wrong Adhesive: Not all adhesives are created equal. Using an adhesive that's not designed for automotive use or that's not compatible with the materials involved can result in a weak bond. Some cheaper adhesives can become brittle or degrade in UV light.
Over-Tightening Fasteners: While it's important to tighten fasteners securely, over-tightening can strip threads, damage the spoiler, or even warp the car's body panels.
Improper Sealing: Failing to properly seal the mounting holes can allow water to seep into the trunk or body of the car, leading to rust and corrosion.
Poor Quality Spoiler: A cheaply made spoiler may not be dimensionally accurate or may be made from materials that are prone to warping or cracking.
Vibrations: The spoiler is subject to constant vibrations, especially when the car is driven at high speeds or on rough roads. These vibrations can loosen fasteners and weaken adhesive bonds over time.
Environmental Factors: Exposure to extreme temperatures, UV radiation, and moisture can degrade the materials used in the spoiler and its mounting system.

What Happens If Ignored

Ignoring the symptoms of a poorly installed spoiler can have serious consequences:

Spoiler Detachment: A loose spoiler can eventually detach from the car, especially at high speeds. This can create a dangerous situation for other drivers and can also damage your own vehicle.
Damage to Car Body: A wobbling or detached spoiler can scratch, dent, or otherwise damage the car's paint and body panels.
Water Leaks and Rust: Improperly sealed mounting holes can allow water to seep into the trunk or body of the car, leading to rust and corrosion.
Increased Drag and Reduced Fuel Efficiency: A poorly installed spoiler can disrupt the airflow around the car, increasing drag and reducing fuel efficiency.
Safety Hazard: A detached spoiler can become a projectile, posing a serious risk to other drivers.

Recommended Fixes

The best course of action depends on the severity of the problem. Here's a breakdown of recommended fixes:

Re-tighten Fasteners: If the spoiler is simply loose, try re-tightening the fasteners. Be careful not to over-tighten them. Use a torque wrench if possible, and consult the spoiler's installation instructions for the correct torque specifications.
Replace Missing or Damaged Hardware: If any bolts, screws, or washers are missing or damaged, replace them with the correct type. Use stainless steel hardware to prevent corrosion.
Apply Automotive-Grade Adhesive: If the spoiler is held on with adhesive, and the bond is weak, remove the spoiler and thoroughly clean both the spoiler and the car's surface. Then, apply a high-quality automotive-grade adhesive, following the manufacturer's instructions carefully. 3M Acrylic Plus Tape is a popular choice for its strength and durability.
Re-Seal Mounting Holes: If you suspect water is leaking through the mounting holes, remove the spoiler and apply a sealant, like silicone caulk, to the holes before re-installing the spoiler. Ensure the sealant is rated for automotive use and is compatible with the materials involved.
Professional Inspection: If you're uncomfortable performing any of these repairs yourself, or if the damage is extensive, take your car to a qualified mechanic or body shop. They can properly diagnose the problem and recommend the best course of action.
Complete Re-Installation: If the original installation was fundamentally flawed, a complete re-installation might be necessary. This involves removing the spoiler, thoroughly cleaning the mounting surfaces, and re-installing the spoiler using the correct techniques and materials.

Cost Estimates and Shop Advice

The cost of fixing a spoiler problem can vary widely depending on the severity of the issue and the type of car. Simple repairs, like re-tightening fasteners or replacing missing hardware, might only cost a few dollars if you do it yourself. Applying new adhesive might cost around $20-$50 for the adhesive itself. However, if you need to have a professional re-install the spoiler, labor costs can add significantly to the total. You could be looking at anywhere from $100 to $500 or more, depending on the complexity of the job and the shop's hourly rate.

Shop Advice: When choosing a mechanic or body shop, look for one with experience in installing and repairing spoilers. Ask for references and check online reviews. Be sure to get a written estimate before authorizing any work. Don't be afraid to ask questions about the repair process and the materials they'll be using. A reputable shop will be happy to explain everything to you.

DIY Considerations: Installing a spoiler yourself can save you money, but it's important to be realistic about your skills and abilities. If you're not comfortable drilling holes in your car's body or working with adhesives, it's best to leave the job to a professional. Always follow the manufacturer's instructions carefully, and take your time. Rushing the job can lead to mistakes that will cost you more in the long run.

TSBs and Community Data: While there aren't specific Technical Service Bulletins (TSBs) related to aftermarket spoiler installations, you can often find valuable information and tips on online forums dedicated to your specific car model. These forums can be a great resource for learning about common problems and solutions. Search for threads related to spoiler installations and removals on your vehicle.

By understanding the potential problems and following these guidelines, you can ensure that your spoiler is installed correctly and will provide years of trouble-free service. Remember, a little extra care and attention to detail can make all the difference.