Replacing thresholds on a VAZ 2110 - how to digest, replace thresholds

Design features: description

Today on a car you can find two design options for thresholds: removable and non-removable. The factory equipment of 2110 involves the installation of non-removable parts that fit into the side of the body and provide the necessary structural rigidity.

For a permanent threshold, rolled or black steel with a thickness of at least 0.9 mm is used. The part is welded to the bottom, preventing the central part of the car from twisting during a frontal impact. This is also an element of passive safety.

Removable sills protect the underbody of the car from mechanical damage, prevent the rapid spread of corrosion and improve the overall appearance of the car. They are installed from inside the cabin, attached to the bottom with self-tapping screws. Rolled iron is used in production and the part is chrome plated.

To further protect both removable and non-removable parts, plastic door sills, steel moldings, aluminum fairings, and body kits are used.

Structurally, the non-removable element is a box welded from several elements:

1. Amplifier. The part is spot welded to the sidewall and bears the main force load from vibrations.
2. Connector. The lower part of the threshold. May consist of one continuous or several parts.
3. External part. It is located directly under the door and is painted at the final stage of repair.
4. Inner part. Visible from inside the car after installation.

Official VAZ dealers offer original repair kits for body repairs. The parts correspond to the dimensions and are suitable for the thickness of the metal. But, like factory elements, they do not undergo the galvanizing process. After reinstallation, all parts must be carefully treated with anti-corrosion compounds, in some cases, if the element is changed, partially puttied.

Welding work

Welding will be required both to replace the entire floor and during repairs, when the rotten part of the bottom is cut out and a patch is welded. The iron for the patch is cut out in advance; the size of the patch should be 2 cm larger than the hole around the perimeter. There is an option to use the original part of the bottom instead of a patch, which is sold separately.

Replacement of car underbody elements

After the car interior is cleared, a full inspection of the underbody is carried out. In some cases, you can limit yourself to a partial replacement—boil only the corroded areas. Rotting of the floor begins from the thresholds of the car; these elements are inspected first. Replacing the body also begins with reinstalling the thresholds.

The bottom of the VAZ 2110 consists of the main elements:

• support platform;
• bottom panels;
• threshold extension;
• side member amplifier;
• crossbars;
• connectors.

It is necessary to check the condition of the panels under the driver's feet, side member reinforcements, jacks or support platforms. If the overall condition of the bottom is satisfactory, you can limit yourself to installing a patch on the damaged area or replacing the bottom element from the repair kit:

1. A drill is used to drill the spot welding points with which the element is installed on the structure.
2. The element is cut out with a grinder.
   

   Under the bottom of the car on the driver's side there are tunnels for the fuel line and brake system. Removing the system on a VAZ 2110 is quite problematic; it is recommended to cut off the old lines and install new parts after repairing the bottom.

3. A metal patch is cut out.
4. The bottom is sanded and a patch is welded.
5. Welding seams are cut off with a grinder and cleaned.
6. The element is primed, sanded, and treated with anticorrosive.

Features of repair of VAZ 2110 thresholds

Before repair, a complete diagnosis of the bottom is necessary. On the overpass, the metal of the bottom is tapped, and the quality of the jacks is checked using a screwdriver or an awl. Replacing the VAZ 2110 thresholds has some features; it is carried out either at a service station or independently. Rules for self-repair:

1. The car is installed on a flat surface at a height, which is convenient: you don’t have to bend down to the ground during welding and cutting.
   

   Before welding the upper part of the permanent threshold, it is recommended to hang the dismantled doors in place. In 30% of cases, independent welding of parts leads to a slight distortion of the body geometry, which cannot be determined with the naked eye. As a result, this will lead to the doors closing with difficulty or not closing at all.

2. The internal element is treated with anticorrosive. It is recommended to use an oil or paraffin composition for interior work in the cabin and bitumen mastic for external metal processing.
3. A rotten threshold must be completely replaced. If you need to get rid of rust, a solvent is used. After cleaning the element with a grinder, it is necessary to treat the surface with a composition that removes rust. All work is carried out wearing gloves and safety glasses.

Causes of rust and preventive measures

The first versions of the VAZ 2110 were characterized by the fact that their paintwork began to peel off in the area of ​​the windshield frame. The problem began to develop from the seal and gradually spread to the entire body element.

Soon the manufacturer changed the painting and installation technology, but still the problem of a body that was not resistant to corrosion could not be completely overcome.

We will look at the main reasons for the probable appearance of rust on the sills, bottom, arches, and side members. We will also give some tips on how to deal with them.

To increase the service life of the underbody of your own car, periodically perform anti-corrosion treatment. Pay special attention to the hidden cavities of the side members and sills.

Rusted thresholds

Problem Definition

It is not difficult to determine the presence of rust on the bottom. Although if you bought the car second-hand, these problems can be carefully disguised.

1. Be sure to inspect the body from below. Traces of corrosion may be hidden behind a layer of anti-gravel coating or putty. Use a hammer or awl to hit these areas lightly. If rust is present, you will see it.
2. Check the condition of the body along the thresholds, in the cabin at the feet of the driver and front passenger. It is these places that are quite weak in the case of the VAZ 2110.
3. If the bottom is rotten, you can notice this by the sagging of the floor under your feet under load.
4. When the driver's seat comes off or cannot be moved, a rotten body may also be the cause.
5. One of the most unpleasant situations is rotten thrust pads designed for lifting a car on a jack. But this way you will immediately determine that there are problems and they need to be solved.

DIY replacement: step-by-step instructions

A complete replacement of the thresholds is carried out if the part has corrosion wear of more than 50%, there are holes, or the rust has reached the amplifier. Partial overcooking is carried out after a mechanical shock, if there is significant deformation and in cases of a single corrosion plaque. A patch is welded onto the threshold. To replace, you will need the following tools:

• angle grinder (grinder);
• wide chisel, set of screwdrivers;
• electric drill with a set of drills;
• clamps and latches will be needed for installation before welding;
• gas welding or electric semi-automatic;
• automotive primer;
• bitumen mastic;
• iron brush, R-80 sandpaper.

Before welding the part, it is necessary to dismantle the interior and doors. Preliminary work step by step:

1. The car is draining fuel.
2. The negative terminal from the battery is disconnected; in some cases, the battery is removed completely.
3. The doors are being dismantled.
4. The trim of the pillars is removed from the interior, the carpet can be rolled to the side and covered with a rag.
5. The overhead protective threshold, if any, is dismantled.

It is recommended to remove all plastic trim to avoid ignition due to sparks from the welding machine. The dashboard is covered with rags, the glass can be covered with paper so that dust from the grinding machine does not settle on them.

Instructions for overwelding parts of a fixed threshold:

1. Mark the cutting lines of the old element with a marker.
2. Using a drill, along the marked line, drill holes with a diameter of 0.4 mm at a distance of 8–10 cm from one another. If a standard unit is changed, the factory spot welding areas are drilled out.
3. Use a grinder to cut out the old element exactly along the marking line. You can use a wide, sharp chisel. Drilled holes make cutting process easier.
   

   Cutting or cutting takes place in the following directions: in the area of ​​the front door, rear door, and the last section to be cut is in the area of ​​the central pillar. The quality of the lower edge of the rack amplifier is checked: if the part is rusty, it is replaced or a power patch is welded.

4. If the metal of the rack amplifier is in order, the outer panel is partially cut off. In the area of ​​the stand and wings, it is necessary to leave 5 cm of old metal, to which the new outer part will be welded.
5. Check the amplifier: in 70% of cases the part must be replaced. Remove the steel panel. The cut should pass through the welding point of the amplifier.
6. Clean the seat from dirt and rust with a grinder. Cut out rusty areas completely, sand them down to white metal, and treat them with a solvent or rust converter.
7. Weld the threshold connector to the subframe reinforcement with an overlap and align the lower edge.
8. Fit the outer part to the connector and secure with clamps.
9. Weld the connector to the bottom of the body, do not loosen the clamps.
10. Weld the outer part.
11. Clean the weld seams with a grinder and sand them.
12. Apply a layer of automotive putty, prime the surface after drying, and paint at the final stage.

Replacing thresholds is a rather labor-intensive and labor-intensive process. At the service station, repairs are carried out by two experienced craftsmen. When replacing yourself, special attention must be paid to the fit of the new element and check the installation locations of the jack.

Tools you will need for DIY repairs

In order to save several thousand rubles, the car owner will need the following set of tools:

1. Bulgarian.
2. Electric drill with a set of attachments for stripping.
3. Cleaning discs for grinders.
4. Standard set of automotive tools.
5. Semi-automatic welding machine and a couple of spools of wire.
6. The new thresholds themselves, if they are planned to be replaced. It is strongly recommended to change the entire threshold at once, as this will help avoid problems in this place for 2-3 years;
7. Primer, solvent, paint, putty and other materials that will be needed to process welds and paint new thresholds.

To carry out threshold repairs, you need a spacious garage with ventilation. This is especially true when carrying out painting work.

If the garage does not have good ventilation, then it is better to paint the car outside.

Preparation for repair

If there are holes in the threshold, it must be completely replaced.

Before you begin repairs, you need to carefully inspect the car's sills. It may be possible to get by with cosmetic repairs . For inspection, the car must be driven onto an overpass or pit.

If, in the case of local corrosion or damage to one section of the threshold, it is a spot repair, then if there are several holes, it is better to replace the entire threshold.

The process of removing the old threshold

It is recommended to dismantle the thresholds after removing the doors, seats and fenders of the car.

It is also recommended to remove the wheels. In practice, only a few do this. Most often, independent repairs occur without removing other body elements. Those elements that may be damaged during welding or painting are simply covered with suitable material.

Before dismantling the sills, the fenders, seats and doors must be removed.

The replacement process itself occurs as follows:

1. First you need to disconnect the battery.
2. Next, using a grinder, the old threshold is cut out, or the damaged part of the threshold is removed.

   Using a grinder, we cut out the old threshold.

3. After the threshold is removed, the body must be thoroughly cleaned of rust.
4. Those places where welding will take place also need to be cleaned of rust, putty and primer.

   We clean the body of rust, putty and primer.

We recommend: How to glue moldings on car doors?

Only careful preparation of the base for welding will help to avoid welding seams in the future.

Video about dismantling the old VAZ-2110 threshold

Installing a new part

Before installing a new threshold, you need to weld the connector of the new threshold to the subframe amplifier.

We weld a new connector to the subframe reinforcement.

Welding should begin from the center of the part , gradually moving towards the edges. After the connector is welded, you need to clean all weld points. The further installation process is as follows:

1. The front panel of the new threshold is adjusted to the vehicle.

   We adjust the outer panel to the connector.

2. After the front part, the entire threshold is adjusted. Clamps are used for fixation.
3. The welding area must be cleared of paint and primer.
4. Holes are drilled at the bottom of the threshold panel.
5. Next, the outer part of the threshold is hung on the car, after which it is secured with self-tapping screws.
6. The lower part of the panel is welded through the holes made.
7. The connector is welded to the bottom of the body.

   We weld the connector to the bottom of the body.

8. The metal must be carefully welded on top of the threshold.
9. After this, the welding seams are cleaned and processed.

Next, the entire surface of the threshold is prepared for painting. Primer and putty are applied. After stripping the putty, several layers of paint are applied. If necessary, apply clear varnish.

The result of replacing the threshold.

Do-it-yourself painting of VAZ 2110 thresholds

The standard repair kit from official dealers is designed for subsequent painting of the part and is supplied in shipping primer, which must be cleaned off before welding. After replacing the threshold, when the primer layer has dried, it is painted:

1. Sand the surface with high and low abrasive sandpaper.
2. Paint the body using a spray gun or spray gun. It is necessary to apply two layers of auto enamel. The sprayer is kept at a distance of 25–30 cm from the surface.
3. Apply the first layer of auto enamel, wait for the paint to dry for 7-10 minutes.
4. Apply a second coat of paint.
5. After complete drying, apply protective varnish.

Let's get to work. Preparation

So first we need to prepare the car. We drive it into the garage and dismantle the interior. It is advisable that the room has an inspection hole. Depending on the scale of the work, we will need to remove one or more seats, as well as part of the carpeting, which comes standard from the factory.

At the next stage, we cut out the rotten sections of the floor with a grinder. We also cut out the metal whose thickness is less than the factory thickness - after repair it can rust again.

Please note that fuel and brake pipes, as well as the exhaust system, run under the bottom.

Next, carefully clean all the seams with sandpaper. You can use a special drill attachment. The remaining traces of rust are treated with a zinc converter. Be careful: he is very aggressive. Therefore, we work exclusively in protective gloves.

Average prices for work on replacing thresholds on a VAZ 2110

Specialized services carry out a complete replacement of threshold 2110 with painting in 2 days, the cost of work starts from 15,000 rubles, the customer’s repair kit is used. The work includes:

• checking the bottom, side members, jacks;
• complete dismantling of the interior;
• dismantling wings, front trim, doors;
• cutting out waste elements;
• installation of new ones using high-precision welding;
• complete anti-corrosion treatment;
• painting;
• installation of overlays, at the request of the customer.

It is recommended to additionally protect the parts with plastic or metal fairings: this will increase the service life of the main part. The cost of the cover starts from 150 rubles; you can install the fairing yourself in 30 minutes.

Practical installation recommendations

Before you begin repairing the car, you must remove the battery, as welding work will be carried out. The preparatory stage includes disassembling the side of the machine from which the threshold will be replaced. The following operations are performed:

• rugs are removed;
• sound insulation is removed;
• seat belts are disconnected;
• seats are removed;
• the door is removed;
• plastic panels are unscrewed;
• lockers are removed;
• the rear wheels are unscrewed;
• The front fender is removed.

In other words, only metal remains. All plastic and flammable materials that would interfere with operation must be removed. The glass must be sealed inside with paper so that the dust that flies from the grinder does not settle on it. In addition, it is advisable to cover the entire interior with plastic film.

The surface is cleaned with a grinder. The rotten part of the bottom of the car is cut off. The threshold is removed and a small part of the lower connector is cut off. If the rust has affected the upper connector, it is also cut off. The preparatory operations are completed by cleaning the surface with a metal brush.

Having adjusted the current supply on the welding machine, weld the connector and amplifier to the new threshold. Then all internal surfaces are coated with a special anti-corrosion mastic. It will provide reliable protection against corrosion. Then the connector is welded. Each weld seam must be cleaned.

To do this, you can use a grinder with a special disc on it. The threshold is carefully welded to the body. Uncooked areas are not allowed. The seam must be uniform and very strong. If necessary, patches are welded, the thickness of which should correspond to the thickness of the threshold.

After welding, the seams are cleaned again. All metal surfaces are covered with a generous layer of mastic. In the cabin, first a layer of mastic is laid, a plastic film is placed on it, then mastic again. Sound insulation is laid on the top layer of mastic, and then carpet. The outer part of the new threshold is covered with several layers of primer. The paint color can be matched to the shade of the car. When welding and painting work is carried out, it is necessary to have:

When performing welding work near the car, you should always have several buckets of water to quickly extinguish the fire in case of a possible fire.

How to choose thresholds for a VAZ 2110: average prices

Today, components for the Zhiguli line are manufactured by more than 20 licensed companies and more than a hundred small firms. The average price for a set with an amplifier is 2600 rubles. The assortment includes plastic and iron spare parts. It is recommended to select thresholds made from 300 series stainless steel with a minimum thickness of 1 mm.

Iron

Original parts are produced by the AvtoVAZ workshop; the thresholds are made of rolled steel and covered with transport primer. Spare parts are installed in their original place. The metal does not undergo additional galvanization; after repair, anti-corrosion treatment is required. The set includes a perforated amplifier. Cost 2500 rub.

For self-repairs, profiles are used instead of a threshold. The pipe is installed in place of the original part and is attached to the bottom with cross members. It is distinguished by increased corrosion resistance due to the metal thickness of 1.5 mm and an additional layer of zinc.

Plastic

Plastic thresholds for the VAZ 2110 are produced by several licensed manufacturers. The most famous and popular:

1. RS Tolyatti. The cost of the plastic kit is 1600 rubles. When replacing, a steel reinforcement is required, which is not included in the kit. Parts are made from impact-resistant, lightweight ABS plastic, element thickness 3 mm. The parts are installed on the load threshold or base using self-tapping screws or auto glue, are not painted, and are easily adjusted to body dimensions.
2. LLC M-version. The company produces tuning sills and body kits for the VAZ 2110/12 line. Parts are made of carbon fiber, can withstand loads of up to 300 kg, and are resistant to chips. The elements must be painted after installation, the cost is 4,700 rubles, the amplifier is not included in the kit.

Tools and materials for work

For self-repair, you will need to prepare a welding tool, abrasive materials and finishing agents, a minimum set of tools:

• pipes for thresholds on VAZ 60x60x2 mm, 40x20x2 mm;
• steel plates for connecting the threshold to the bottom;
• grinder with a set of carriage brushes;
• cleaning circles;
• electric drill;
• semi-automatic welding machine;
• sandpaper R-80;
• primer, automotive putty;
• bitumen anti-corrosion mastic;
• rags.

What affects the cost

The location of the repair is a major factor in the cost of replacement. If you carry out repairs yourself, drivers only spend money on purchasing the necessary material and parts. Tools are often either rented or already present in the garage.

When repairing at a service station, the work is expensive, and this is justified. The design of the threshold, despite its simplicity, requires great skill and care when replacing. If you are not confident in your skills as a welder, straightener and tinsmith, it is better to entrust the replacement of thresholds to a specialist.

Causes of corrosion

The manufacturer does not pay enough attention to the anti-corrosion treatment of these machines (as well as sound insulation). This is evidenced by numerous reviews from owners. But if you can still put up with the noise in the cabin, then you can’t put up with the holes in the floor.

• Weather. Metal rusts upon any contact with water, even if it was painted and treated at the factory. But rain is not the most destructive factor. More aggressive towards metal are the salt reagents that our road services use to sprinkle the asphalt in winter. If you don't frequently wash the underside of your car with high pressure, the salt will remain in the most hidden places. Further, rust will form in these areas, and after a year - through holes.
• Road accident. Even with a minor accident, the base layer of enamel and primer separates from the metal. If the painting was done by unqualified craftsmen, after 1-1.5 years rusty marks will form in the same place. The same problems occur if the surface was not properly prepared for painting and was poorly cleaned.
• Clogged drainage. Often, repairs to the underbody of a VAZ-2110 are required due to clogged drainage holes. Water eventually gets into the cabin and trunk. It has nowhere to go - it is absorbed into the factory carpet and soft soundproofing material. In addition to corrosion, it can cause a characteristic smell of mold and rot. Water also forms when using unsealed mats. Textile products are very popular now. But not every model retains moisture, which is why it is absorbed into the carpet and then onto the metal.

Thus, the bottom of the VAZ-2110 is exposed to negative effects from both sides. Plus, it is very difficult to find the source of the problem. Not everyone has a hole in their garage, and no one will disassemble the interior in order to identify “bugs.” They ride until the floor is soft like jelly.

Reasons for replacing thresholds on the VAZ 2110

The bottom and sills of the VAZ 2110 are susceptible to corrosion, as a result of which they rust and collapse. Mainly due to the fact that it is this part of the car that is most exposed to moisture and other aggressive environmental factors, such as reagents and salt, which are sprinkled on roads during icy conditions. Mechanical damage cannot be ruled out : impacts and scratches first lead to dents and chips of paint on the thresholds, and then rust occurs. The quality of the metal itself plays an important role. In these cases, the need to change the thresholds becomes obvious.

The work of replacing thresholds involves the use of both welding and abrasive tools. Carrying out painting, puttying and other work. In other words, this is an enterprise that should last at least several days with fairly good labor productivity.

The easiest way to work is with a semi-automatic welding machine, with which anyone can learn how to weld. If you don’t have it, then you probably shouldn’t run to the store. You can always contact your friends or a specialized workshop. After all, the unit costs approximately more than 15 thousand rubles. For a full repair of a VAZ 2110 at a service station, you will be asked for approximately 3 thousand rubles. And it will last for ten years. But if you decide to do the repair yourself, then these instructions will help you.

How to properly replace the underbody of a car?

#1 Maler

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#2 Vladimir from Kamyshin

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#3 Peacemaker

• City: Irkutsk. Alexander, can you please

Can anyone tell me how to replace it correctly and reliably? I looked for smart welders in the area, but couldn’t find them. Seeing the work of some craftsmen, it became simply creepy (I don’t give a shit either). I would be grateful for your advice.

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#4 MIHA75

• City: N. Tagil

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#5 Maler

thank you. The car was bought by my sister and who knows. It turned out to be a bit broken. It’s a pity to sell. I changed a lot of things with my own hands (debut). The bottom is rotten. Apparently it was without treatment. I’ll be honest, I don’t know about the thresholds and the above. I don’t even know such words))) that’s why I’m looking for a person who will do it conscientiously. They suggested taking it to a service center to measure and level the geometry (visually the left gap on the trunk is a little larger. I think a stretcher and a properly tightened lid will correct the situation). In general, they don’t take on small rust, they offer to paint everything at once, with welding work the price becomes huge. Don’t laugh, but if I had the extra 100 thousand they ask for at the service center, they wouldn’t take the ’04 VAZ. I cooked it myself, without experience. I've been working recently. and not particularly neat. You still have years of training to reach your level. in general, I’m afraid myself. If I looked at how it’s done, maybe I could learn. In welding, I mastered what I can with the help of your forum and by trial and error. I would have practiced on some Cossack, but not))) inner voice yells - don't poke your nose in) sorry for the many letters)

How to change the thresholds of a VAZ 2110

1. To avoid distortion of the car body, place the car on a flat surface.
2. Remove the locker, doors (rear and front), driver and passenger seats, car fenders. Also remove seat belts, floor mats, and sound insulation from the floor.
3. Protect your car windows with homemade curtains, which can be made from cardboard. This will be needed to prevent them from being damaged by sparks flying from the grinder. Otherwise, black spots will appear on the windows that cannot be removed.
4. Remove fusible and plastic machine components from the work area.
5. Disconnect the battery to prevent it from being affected by the welding machine.
6. Mark the cut lines for the old thresholds. A series of holes with a diameter of at least 4 mm are drilled along these lines , located at a distance of 5-8 cm from each other.
7. Using a grinder, cut off the old threshold, part of the bottom damaged by corrosion, as well as the threshold connector at the bottom and top of the VAZ threshold.
8. When cutting off the outer sill panel, be sure to leave areas of metal at the front and rear fenders. The length of these sections is at least 5 cm; it is to them that the new panel will be welded later. You should also leave a small area of ​​metal under the B-pillar.
9. Continue the repair by scraping the surface where the new threshold will be located using a scrubbing brush, and then treat the surface with a corrosion neutralizer .
10. Before carrying out welding work at the stage of installing a new part, first hang the doors to ensure correct installation.
11. After installing the component on the car, be sure to treat the surface with an anti-corrosive agent or special primer.

It must be remembered: the larger the area of ​​the damaged areas, the more material and effort will be required to repair them.

The tool we need is:

• welding unit (the most convenient and simplest option would be semi-automatic welding);
• grinder and 3 discs for the grinder, a hard metal brush for the grinder;
• a set of new thresholds, amplifiers and connectors for the VAZ 2110;
• grinding tool;
• electric drill;
• metalworking tools;
• packaging of automotive mastic;
• 2 medium-sized paint brushes;
• can of primer;
• bottle of solvent.

Preparing the car

To replace the thresholds, the car must be prepared by performing partial disassembly. To do this you will need:

• Place the car on a level surface (it is important to avoid distortions in the body).
• Remove the locker, front and rear doors, driver's seat, passenger seat, fenders, seat belts, remove sound insulation from the floor.
• Car windows should be covered with rags or cardboard curtains to protect against sparks and flying scale.
• Any items that could catch fire or melt in work areas should also be protected or removed;
• Disconnect the battery so as not to accidentally affect the battery and electrical wiring of the car;

At this point, the preparation of the car for replacing the thresholds can be considered complete.

Repair of removable structures

Removable thresholds are easy to dismantle and replace. They are convenient and practical to use. They are installed outside or on the side of the side members. Removable thresholds provide effective protection of the underbody of the car from stones.

To repair removable elements, metal or plastic is used. Self-restoration is performed according to the following algorithm:

1. Screwing in fasteners.
2. Removing the threshold.
3. Removing traces of corrosion.
4. Applying putty and primer.
5. Painting.

Important points

• All work on replacing thresholds should be carried out with the machine installed on a level surface, without distortions.
• Before welding the top edge of the new thresholds, you should definitely try hanging the doors on the car yourself. There are often cases when doors after welding either close with difficulty or do not close at all. And this can happen due to one slight misalignment of the thresholds, which is not always possible to notice with the naked eye.
• You should never skimp on anti-corrosion treatment of thresholds. If it is not carried out, all the work done will go down the drain in a few years.
• It is best to clean thresholds from rust and dirt using a solvent. When working with it, you need to follow safety rules: use gloves, wear safety glasses (this is especially important if you have to work on the bottom of the car while standing under an overpass - drops of solvent can easily get into your eyes), and apply the solvent itself only with a paint brush.
• Before welding the thresholds, a series of holes with a diameter of at least 3 mm should be drilled in the areas of metal to which the threshold is planned to be attached. This will greatly facilitate the spot welding process, and the threshold will be held more firmly.

The main thing when replacing thresholds is accuracy and attention. It is very important to cut out all rusty and damaged metal from both the underbody and the sills. If even one small area of ​​rust remains, the destruction of the structure will begin again. And, of course, anti-corrosion treatment when replacing thresholds is mandatory.

• Author: Alexey Stepanov
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