Thresholds on the car Skoda Octavia A7 It is one of the most vulnerable areas of the body, especially in operating conditions in countries with harsh climates and the use of reagents. It is here that moisture, dirt and salt accumulate, which quickly destroy the metal structure. For owners. Skoda Octavia A7 The issue of preserving the body is especially acute, since the cost of body repairs can be comparable to the price of a used car.
Many car owners are faced with the need not only to install protective elements, but also to carry out complex repairs to already damaged areas. Ignoring the first signs of corrosion on the thresholds can lead to loss of body rigidity and serious problems in further operation. In this article, we will discuss in detail all aspects of working with thresholds: from choosing protective stickers to completely replacing sections.
Why are the Skoda Octavia A7 sills susceptible to corrosion?
Body structure Octavia A7 provides for the presence of cavities in threshold beams, which serve to increase rigidity, but at the same time become traps for moisture. If the factory corrosion treatment has been disrupted during production or at the manufacturing plant, the rotting process begins from the inside and is invisible to the owner until the metal rots through.
The main factors accelerating the destruction are road reagents, small stones flying from under the wheels, and constant temperature changes. In winter, moisture freezes in the microcracks of paint, expanding them and opening oxygen access to the metal. Factory galvanized in some areas it is insufficiently thick, which makes the car vulnerable without additional protection.
Particular attention should be paid to the places where suspension elements are attached and points where dirt accumulates. If you notice any blistering of the paint or rust stains, you must begin the restoration process immediately. Local corrosion quickly spreads to adjacent panels such as arches and floor pans.
โ ๏ธ Attention: Neglecting anti-corrosion treatment of thresholds may result in the vehicle not passing inspection or being rejected when checked for accident damage.
Types of protection: Stickers, plastic and metal box
To preserve the appearance and integrity of the metal, owners Skoda Octavia A7 choose different methods of protection. The most popular and budget option are polyurethane pads (armor film), which are glued directly to the paint. They are almost invisible, but perfectly protect against chips and scratches.
A more reliable, but visually noticeable solution is plastic or metal thresholds. Plastic covers are attached to self-tapping screws or adhesive tapes and protect against impacts from gravel. Metal sills, often called "mud flaps" or "skirts", provide maximum protection against mechanical damage when parking near curbs.
When choosing protection, it is important to consider climatic conditions. In regions with a lot of snow and reagents, plastic elements can become an additional place for moisture to accumulate between the trim and the body, which will accelerate rotting. High-quality installation and proper sealing of seams play a decisive role here.
- ๐ก๏ธ Polyurethane film: Ideal for preserving the factory appearance and protecting against small chips.
- ๐ฉ Plastic covers: A cheap way to protect against impacts, but requires careful installation.
- โ๏ธ Metal sills: Maximum strength, but can compromise aerodynamics and look rough.
- Nothing, I believe in zinc
- Polyurethane film
- Plastic linings
- Metal thresholds
Preparing for repairs and diagnosing damage
Before starting any work, it is necessary to conduct a thorough diagnosis of the condition of the thresholds. Often, serious defects are hidden under a layer of dirt and old paint that are not visible during a quick inspection. You will need to remove the wheel covers, unscrew the plastic covers (if any) and carefully inspect the metal.
Use a flashlight and, if necessary, a screwdriver to test the softness of the metal. If the metal bends under light pressure, this indicates deep corrosion. In this case, simple painting will not help, you will need cutting out the damaged area and installing a patch or inserting a new section.
If you plan to install new protective elements, the surface must be perfectly clean and free of grease. Any remnants of old glue, bitumen mastics or rust will cause the new protection to peel off. Use White spirit or a special degreaser for surface preparation.
โ๏ธ Threshold diagnostics
Do-it-yourself threshold restoration technology
Repairing thresholds is a complex process that requires skills in working with welding and body materials. If the damage is not critical, it is enough to clean the metal to a shine, treat it with a rust converter and apply a primer with anti-corrosion properties. For deep damage, it is necessary to cut out the rotten area with a grinder.
After cutting, a new sheet steel insert is prepared. It is important to choose metal of the same thickness as the factory one, so as not to disturb the geometry of the body. The insert is welded by spot welding or argon. Weld quality directly affects the durability of the repair and the rigidity of the structure.
After welding, the seams must be cleaned, treated with acid primer and applied with epoxy primer. This will create a barrier to prevent new rust from forming. The final painting must be done in the body color, following the drying and varnish application technology.
โ ๏ธ Attention: When welding thresholds, there is a risk of damage to wiring and interior elements if special protection and grounding methods are not used.
Comparison of materials for anti-corrosion treatment
Selecting the correct material for the interior sill cavities is critical. Liquid rubber, Movil, bitumen mastic and synthetic oils have different properties and service life. For Octavia A7 It is often recommended to use formulations based on wax or synthetic oils that can displace moisture.
Asphalt mastics are good for exterior applications, but they can crack in cold temperatures and peel, creating pockets of water. Wax compounds penetrate deeper into the micropores of the metal and create an elastic film that is not afraid of temperature changes.
Specialized anticorrosives, such as Dinitrol or Tectyl, are a better choice, but are significantly more expensive. They provide protection for many years, preventing the development of corrosion even in the presence of minor damage to the coating.
| Material type | Pros | Cons | Service life |
|---|---|---|---|
| Bitumen mastic | Cheap, easy to apply | Cracks in the cold, peels off | 1-2 years |
| Wax compounds | Deep penetration, elasticity | High price, requires heating | 3-5 years |
| Oil anticorrosives | Self-penetration, water displacement | Liquid consistency, gets your hands dirty | 2-3 years |
| Liquid rubber | Durable film, shock protection | Difficult to apply in cavities | 2-4 years |
Hidden processing nuance
If you are processing thresholds from the inside, be sure to drill technological holes in places where there is no paint coating to insert the tip of the gun. After processing, the holes must be sealed.
Installing protective pads: Instructions and nuances
Installing plastic or metal trims requires precision. Before starting work, you need to try on the parts and mark the drilling locations. For Skoda Octavia A7 Special fasteners that come with the linings are often used, but sometimes modifications are required.
You need to make sure that there are no gaps between the trim and the body where water can accumulate. If there are gaps, they should be filled with sealant. Using quality sealants Silicone or polyurethane based is required.
When tightening screws, do not use excessive force to avoid stripping the threads or deforming the plastic. If you use the glue method, the surface should be heated with a hairdryer to a temperature of about 40-50 degrees for better adhesion.
- ๐ง Fitting: Attach the overlay, check the alignment of the holes and gaps.
- ๐งผ Cleaning: Thoroughly degrease the installation area with alcohol or a special product.
- ๐จ Fastening: Use recommended fasteners and do not overtighten bolts.
- ๐ก๏ธ Sealing: Apply sealant to joints to prevent moisture ingress.
Before drilling holes in the threshold to attach the trim, be sure to check for wiring or pipes under the plastic using a scanner or magnet.
Professional repairs and when to call for service
Some types of threshold repair work are best left to professionals. If the damage affects the load-bearing structure of the body or if complex welding geometry is required, attempting it on your own may make the situation worse. Service centers have equipment for accurate geometry restoration.
Professionals use special chambers for drying and painting, which guarantees the absence of defects in the paintwork. They also use modern coating thickness diagnostic methods to identify hidden defects. Work guarantee - this is an important advantage of using specialized services.
If you notice that the threshold flexes when you open the door or you hear a squeak when moving, this is a sign of loss of rigidity. In such cases, it is necessary to immediately contact specialists to assess the condition of the power elements. A complete replacement of the thresholds on the Skoda Octavia A7 may be required in case of total rot, when restoration is not economically feasible.
โ ๏ธ Attention: An attempt to straighten a heavily damaged threshold without special equipment can lead to a violation of the body geometry and wheel alignment problems.
Regular checking of the condition of the thresholds and timely anti-corrosion treatment is the key to the long life of your car body without expensive repairs.
Frequently asked questions (FAQ)
How often do you need to renew the anti-corrosion treatment of thresholds?
It is recommended to inspect and, if necessary, update the anti-corrosion layer every 2-3 years, especially if the car is operated in an aggressive environment with a large number of reagents.
Is it possible to cover rust on thresholds with polyurethane film?
No, this is absolutely not possible. The film will not stop the corrosion process, but, on the contrary, will create conditions for its acceleration, since the moisture will remain under the film without air access.
What tools are needed to replace thresholds yourself?
To replace the thresholds you will need: an angle grinder, a welding machine (preferably a semi-automatic one), a drill, a set of drills, putty, primer and paint. Personal protective equipment is also required.
Why do thresholds creak after installing the overlays?
Squeaking is usually caused by plastic rubbing against metal. To avoid this, it is necessary to use special gaskets or lubricant between the elements during installation.
Does installing plastic thresholds affect the vehicle's ground clearance?
Installing trims can slightly increase ground clearance, but more often than not they simply cover the existing profile without significantly changing the ride height, unless they protrude too far down.