Installation of the license plate is the final stage of preparing the car for exit on public roads, which often causes questions for beginners. An improperly fixed frame can rattle, create noise, or, worse, result in a penalty for unreadable characters. In this article, we will discuss in detail how to attach the room frame to the bumper so that it lasts for years and looks aesthetically pleasing.
There are several fixation methods, depending on your vehicle’s design and personal preferences. Some drivers prefer classic drilling for maximum reliability, others are looking for ways to do without damaging the body. The Right Choice of Fasten directly affects the durability of the structure and the absence of extraneous sounds when moving.
Before you start working, it is important to prepare the tools and choose the optimal place on the bumper. Mistakes at this stage can cost you time to rework or even damage the paintwork. We will cover all the nuances so you can get the job done professionally the first time.
Choosing the Right Type of Fixing
The first step to a successful installation is to determine the type of fastener that will suit your car. Modern room frames are often equipped with plastic stubs, but their reliability leaves much to be desired at high speeds. More advanced solutions include metallic Or special screws with decorative hats.
If you want to avoid drilling holes in the bumper, there are alternatives. A double-sided car tape or specialized adhesive sealant can provide sufficient fixation, especially for the rear room, which is less susceptible to oncoming airflow. However, for the front part, where the aerodynamic pressure is high, the mechanical mounting remains uncontested.
⚠️ Attention: The use of poor-quality glue in winter can lead to uncoupling of the room. At low temperatures, the adhesion of many compounds decreases, and a gust of wind on the track can disrupt the structure.
It is also worth considering the material of the frame itself. Aluminum products are lighter than steel, but require more careful handling when tightening screws, so as not to deform the metal. Plastic frames are the most versatile, but over time they can burn out in the sun.
Required tools and materials
For a high-quality installation, you will need a minimum set of tools that are found in the garage of most motorists. The basis is driller with a set of drills of different diameters. For bumpers made of soft plastic, a 3-4 mm diameter drill is often enough, whereas for metal brackets, more powerful equipment will be required.
We cannot do without measuring instruments. Roulette or ruler is necessary for accurate alignment of the room relative to the centerline of the car. A marker or construction pencil will help mark the drilling points. Also prepare paint tape to protect the adjacent areas of the body from scratches with the tool.
Here is a list of basic equipment that should be on hand:
- 🔧 A drill or screwdriver with a set of drills.
- 📏 Roulette, ruler and marker for marking.
- 🔩 A set of screwdrivers (cross and flat) or bits.
- 🧼 Degreasing and rags for surface preparation.
Pay special attention to consumables. If you are planning to use screw-trapMake sure they have an anti-corrosion coating. The normal ferrous metal will quickly rust and after a year your neat installation will turn into a rusty spot.
Surface preparation and marking
The quality of surface preparation determines how reliably the frame will sit. Even microscopic particles of dirt or fat can disrupt the contact of the fastener with the bumper. Wash the installation site thoroughly with warm water with detergent, and then treat it. degreaser Or isopropyl alcohol.
The markup is the most important stage where you can not rush. Apply the frame to the bumper and visually assess its position. It should be strictly parallel to the ground and symmetrical with respect to the center of the car. Use the level if the bumper surface has a difficult relief.
Use paint tape to temporarily fix the frame on the bumper before the final marking. This will allow you to step back a few steps and evaluate the symmetry of the installation from the side.
For accurate hitting of the drill at the right points, you can use a tricky technique. Attach a frame, seal the places of future holes with a piece of scotch right on the frame, remove it and transfer the marks to the bumper. Or, if the frame allows, carefully drill holes in it in advance, apply to the bumper and through the finished holes put the points with a marker.
⚠️ Attention: Before drilling, make sure that wires, hoses or bumper attachment elements do not pass from the back of the bumper in the work area. Wiring damage can result in costly electrical repairs.
Instructions: self-tapping
Self-tapping is the classic and most reliable way of fastening. It provides a rigid fixation that can withstand vibrations and washings under high pressure. Before starting work, make sure you choose the right length of screws: they must go through the frame and go deep into the bumper, but do not stick out from the inside.
The process begins with the creation of pilot holes. Do not try to screw a thick screw into the plastic right away - this can lead to cracks or deformation of the material. First, use a thin drill (2-3 mm) to create a guide, then expand the hole to the desired diameter.
☑️ Pre-drill check
After preparing the holes, attach a frame and start screwing the fastener. It's important to observe puff-up. The bumper plastic is elastic, and if you pull the screw, it can push the material or create a dent around the hat. An untamed screw will hang around and rattle.
To improve the appearance and tightness under the hats of screws can be put rubber washers. They work as a damper, quenching vibrations, and prevent moisture from entering the fastener, protecting the metal from corrosion.
Installation on plastic clips and screws
Modern cars are often equipped with special seats or use mounting systems on clips. This method is considered more aesthetic, as the hats of screws are often hidden or have a decorative coating under the color of the body. Plastic clips work on the principle of strutting: when screwed screw their petals expand inside the hole, fixing the structure firmly.
The installation technology is similar to the installation of screws, but requires more accuracy. The hole must be drilled exactly under the diameter specified in the instructions for clips. If you make the hole too large, the clip will not hold; too small – the plastic will burst when installed.
Screws in such systems usually have a secret head that hides in the depths of the frame. This protects them from vandals and makes the appearance of the room more neat. However, it will be more difficult to remove such a number for washing or replacement, you will need to twist each screw completely.
What to do if the clip broke during installation?
If the plastic clip burst, do not try to reuse it - it will not provide a reliable fastening. Replace her with a new one. In extreme cases, you can use a metal screw of the right diameter, but this will require caution not to damage the thread in the hole.
It is important to note that clips are sensitive to temperature. In severe frost, the plastic becomes fragile, so the installation is better carried out in a warm garage or warmed up the installation site with a hairdryer. This will reduce the risk of damage to the fixing elements.
Alternative methods: glue and magnets
For those who do not want to drill a bumper, there are alternative solutions. Specialized automotive adhesive sealant (for example, based on polyurethane) is able to withstand significant loads. Before applying the glue, the bumper surface and frame should be perfectly clean and fat-free.
Magnetic mounts are another popular option, especially for those who rent numbers frequently (for example, to participate in a rally or to prevent theft in a parking lot). Strong neodymium magnets are attached to the frame, and the metal plate response is attached to the bumper (or vice versa). However, this method requires that the bumper be metal, or you have to glue a metal base, which partially solves the problem of drilling, but not completely.
The 3M VHB (Very High Bond) double-sided tape also shows excellent results. It can withstand temperature and vibration changes. The main rule is to press the frame strongly after the sticker and allow the glue to be polymerized for 24 hours before the first operation.
⚠️ Attention: When using glue or tape, remember that it will be extremely difficult to remove the room without damaging the paint coating. Often you have to heat the structure and cut it with a knife, which can leave traces on the bumper paint.
Table of comparison of fastening methods
To make it easier for you to choose the best option, we have prepared a comparative table of basic methods. It will help to weigh all the pros and cons of each method.
| Method | Reliability | Complexity of installation | Risk of body damage |
|---|---|---|---|
| Self-tasher | Tall. | Medium | High (holes) |
| Plastic clips | Tall. | High (need accuracy) | High (holes) |
| Car glue | Medium/High | Low. | Medium (hard to remove) |
| Double-sided scotch | Medium | Low. | Low. |
As you can see from the table, there is no universal solution. For daily operation in all weather conditions mechanical (Shooters or clips) remains the leader in reliability. Glue methods are more suitable for temporary installation or for cars that rarely leave the city and are stored in a garage.
Frequently Asked Questions (FAQ)
Can I only lock the room frame on the top two screws?
Technically, it is possible, and many people do it to save time. However, when driving at high speeds, the lower part of the room will vibrate and rattle. In addition, the risk of the number being torn off by a branch or on the sink increases. It is recommended to use all four attachment points.
How to treat the holes after drilling, so that there is no rust?
Even if you have a plastic bumper, there may be metal reinforcement elements inside. After drilling, it is recommended to drop a little anti-corrosion composition into the hole or simply paint the edges of the hole with nail polish or paint in body color. This will prevent the oxidation of the edges.
What size of screws should I use for a plastic bumper?
The optimal size is screws with a diameter of 3.5-4 mm and a length of 10-15 mm. Longer ones can rest on the internal elements, and thinner ones can easily break when tightened. Be sure to use washers to distribute pressure.
Do I need to remove the bumper to install the frame?
In most cases, removing the bumper is not required. It is enough to have access to the inside through the wheel arch or from the bottom. Removing the bumper is justified only if you plan to install additional lighting of the room with the wires.
The main secret of a long-term installation is not so much the fastener itself, as the quality of surface preparation and accurate marking before the start of work.