In detail: do-it-yourself auto bottom repair from a real master for the site my.housecope.com.
Sometimes there are cases when it is much more profitable, both financially and in terms of saving time, to repair your car with your own hands. In this regard, today we will consider how you can easily and quickly restore the front floor of a VAZ 21099 car. As you can see in the photo below, you will have to change the entire square, which is completely rotten, patches in this case will not help.
- firstly, it is necessary to place the machine in such a way that it is convenient to work, that is, that there is comfortable access to it both from below and from the side of the door;
- it is also recommended to cover the dashboard and seats with a film so that dust does not get on them when you need to cut a piece of the floor. After that, you will need to purchase or, if possible, get a piece of iron for free in order to cut out a “detail of the required size for the floor” from it.
Also, for repairs, you will need a front jack and threshold connector. What materials are suitable for processing? The bottom will need to be coated with Body 930, and the floor, after welding, will need to be filled with Body 992 anti-corrosion primer.
What else awaits the masters during work? You will have to raise the support (pictured below), under which, most likely, you can find rust. The joint of the new metal will pass under it.
How to raise it? It is necessary to drill points that will then help you orient yourself, or you can put yourself other marks.
Be sure to get to the very place where she stood, otherwise there will be problems with installing the seat. At the top of the threshold, you need to focus on the area where the paint has been preserved, and it is along the edge of this area that you need to cut out a rusted piece of the floor.
Video (click to play).
As for the door, it is better to remove it. This will help create a more comfortable working environment. Of course, it will take a little longer to repair, but in the future it will not interfere with the restoration work.
If you look at the threshold, you can see that he himself is quite suitable, only the edge is wrinkled.
What can be done is to put a thick plate in the place of the amplifier, in the appropriate place (in the photo below) and fasten it by welding in the right places.
What to look for: before starting work, you need to cover the interior (so that dust does not get on the seats and dashboard, disconnect the battery terminals).
In this particular case, semi-automatic and CO2 gas will be used for welding.
At the initial stage of work, you need to drill out the base. The points are affixed, then it will need to be put in place.
As you can see, the support was not removed in vain, there is a lot of rust under it, which must be removed, as well as the boundaries of the new plank should be marked.
Now let's move on to the spar. If it is in good condition, it can be left, as in our case. The floor is welded to it with dots. They hold the junction of the threshold and the floor itself.
The photo shows the spars and threshold connection.
The jack will also need to be changed.
Another important nuance should also be taken into account: welding will be carried out in the places indicated in the photo.
As a result, anticorrosive will burn under the arch. To apply a new one, you will need to remove the wheel and fender liner. However, first, when these elements are removed, you need to cut out the rusted section of the floor. In places where you can find points, you will just need to drill them, where they cannot be found, you will need to cut the metal. As one of the options to reduce dust in the cabin, you can pour water on the treated area and cut on an already wetted surface.After the section of the rusted floor is cut out, you can proceed to the next step.
Do not forget that under the area shown in the photo, there are brake and fuel pipes. Therefore, you need to disconnect them, make a spacer so that they are as far away from the metal as possible.
After that, you can cut off the old floor. Where the points are visible, it is a little easier, in these places they can be drilled and the metal separated.
In places where they are not visible (like on a spar), you can cut off the edges or even make an incision in the middle and, prying up the incised area, find these points. The main idea is to leave the spar, which after cleaning will be in good, working condition.
In addition, as you can see from the photo, where there was quite a lot of rust in the place of the base bar, now it is almost a clean place. All it takes is sanding the area, treating it with a rust converter, covering the area with primer, and it doesn't need to be cut off.
The next step is to cut out the front jack, as it is quite rusty, and we have a new one. As for the threshold connector, it is still in good condition and there is no need to do the extra work of cutting it out and replacing it with a new one.
What should be done next? Everything is very simple: a piece of the floor that we managed to get is installed in its place, the excess parts are cut off, a thorough fit and welding is performed.
When the floor is welded, you will need to weld a cross member on top.
It is necessary to weld the front jack, install the threshold connections, cover the new piece of floor with a primer on top, and cover with grease on the bottom, Body 930 will do.
It is the bottom in the car that wears out faster than other body elements, due to the fact that it is constantly exposed to aggressive environmental influences. Do not pass without a trace and various mechanical damage. Using various methods to prevent the development of corrosion, you can try to save the car body from it, but another kind of damage will still someday manifest itself.
The main reason that affects the development of poor body condition is poor quality road surface. A car that is more than a dozen years old will sooner or later require do-it-yourself bottom repair. We learn about all kinds of ways that can be done without welding.
It should be noted right away that all operations that are performed with the car body without the use of welding methods are called by experts unprofessional, in other words, “garage”. This is primarily due to the fact that they are not the result of any innovative idea put into action, most often the basis for independent work is the properties of the materials used in the work or other substances.
Such repair of the bottom of the car does not have any specific technology that would be checked by the appropriate qualified people or special organizations, it is not burdened with norms and standards. The idea of self-repair of the body, most likely, came to experienced car owners who were smart and adapted to specific domestic conditions. It is worth noting that in no European country a self-respecting citizen will engage in such actions, moreover, such an idea will not even occur to him. Damaged parts of the body are not repaired abroad, a broken or old car is simply replaced with a new one. The methods of car repair described below allow for the most part to eliminate or hide through damage to the upper parts of the body or the bottom of the car.
Starting the repair of the bottom of the car, you should take into account some requirements and the basic rules by which almost all body work is carried out:
you need to have a grinder with you, with its help it will be possible to cut out a rusted area or expand a place with damage;
the area of \u200b\u200bthe body or bottom, which will be repaired by oneself, is previously cleaned of everything superfluous, in particular, from old paint, lumps of dirt or rust;
the prepared place must be degreased and treated with anticorrosive;
the hole with the “patch” must be given a primary appearance, i.e., upon completion of the repair work, a surface with the original configuration should be formed. A great helper in this matter can be paint putty for cars;
the repaired body as a result needs to be prepared for painting.
To repair the bottom without welding, you will need several galvanized sheets, as well as bolts of a certain size. The damaged body element must be cut out with a grinder. Then two measured galvanized sheets should be cut, which will cover the leaky area from the outside and inside. The bottom should be treated on all sides with special bituminous mastic, the substance applied for insulation should dry well. Do not forget about the processing of prepared sheets with mastic before they are installed.
First you need to adapt the lower element, it is best to fix it with self-tapping screws, the galvanized sections that protrude must be cut off. The remaining inner metal sheet must then be applied. The resulting structure is fixed with bolts with a size of M5 × 15. For uniform coverage, fixing is best done sequentially, strictly along the perimeter.
If the threshold during operation has acquired a lot of dents and needs to be replaced, you should try to save money and repair it yourself. To do this, it is necessary to drill as many holes in the threshold as needed to fit a special tool with which the bent sections are straightened. At the end of the work, all holes must be sealed, and the car must be prepared for painting.
Naturally, with free time and at least minimal knowledge, almost any motorist can repair minor damage to the body that occurs during the operation of the car. However, it is worth remembering that it is better to entrust the overhaul of the body to specialists who will help the car return a nice appearance.
The bottom of the car, more than its other parts, is subject to aggressive environmental influences, and is also subject to mechanical damage. If the bottom can be protected from corrosion, then this is unlikely to succeed from various kinds of damage. The reason for this is often the unsatisfactory condition of the road surface. In general, sooner or later, the car owner will have to face the need to repair the bottom of his iron horse, especially if he has been serving his owner faithfully for many years.
Overcooking of the bottom - this diagnosis is often made to car owners at service stations. It sounds very serious and from these words it smacks of a hopeless situation and the high cost of its resolution. Is it really? Situations are different, but often things are not as deplorable as they are presented by car service specialists. If you wish, you can do everything with your own hands.
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Masters at car services most often exaggerate and tell the car owner that a rotten bottom requires a lot of painstaking work, the cost of many materials. This is what makes the price so high. At the same time, they try not to allow the owner to be examined or problem areas are shown in low light. In this case, ordinary dirt can be mistaken for oxidized rotten metal, which you only have to touch and it crumbles.With the help of such small tricks, the colors thicken, which allows you to inflate the price.
If the car owner wants to save money, he needs to do a preliminary inspection of the bottom on his own. For this you will need:
Elevator, viewing hole, overpass.
Good lighting: a flashlight or a carrier with a powerful lamp.
Hammer.
Using a hammer, it is necessary to tap all suspicious areas of the bottom and determine the degree of their damage in order to approximately know the amount of materials needed.
If all of the above is not at hand or there is simply not enough time for a thorough inspection, then a special mirror will come to the rescue to inspect the bottom of the car. It will allow in general terms to assess the condition of the metal and get a rough idea of the scope of work. But the full situation will become clear only after a thorough examination.
The welding process itself is simple, it can be mastered by everyone in the shortest possible time. Sometimes it takes more time to connect and set up equipment. The easiest way to carry out the overcooking of the bottom of the car is with a semi-automatic welding machine. But often such repairs are simply impossible without the involvement of gas welding. Best of all, when these two devices are used, they complement each other and improve the quality of the bottom repair.
As the saying goes: "If you want to do something well, do it yourself." Car underbody repair is no exception. For its implementation, you will need the following equipment:
Semi-automatic welding machine.
Gas welding.
Ordinary scissors for metal or electric.
Bulgarian (angle grinder).
Hammers of various sizes and configurations.
Good lighting.
You also need to stock up on the following materials:
Oxygen and calcium carbide (for gas welding).
Carbon dioxide and copper wire (for semi-automatic welding machine).
Circles for cutting and grinding metal on the grinder.
Metal for patches.
In order to repair the bottom of the car with your own hands without problems, you need to choose a metal of optimal thickness. Its recommended thickness varies from 1 to 2 mm. But here one should take into account the qualifications of the one who will carry out welding work. When working with thinner metal, it is necessary to strictly observe the requirements of the temperature regime during welding. Which, in turn, depends on the debugging of equipment and the quality of consumables.
Thicker metal is more difficult to process, but at the same time it is more difficult to damage and spoil it. Therefore, before purchasing consumables, you need to realistically assess your qualifications as a welder.
Now you can start preparatory work. There is nothing complicated in this, and it will not be difficult to do them yourself. You just need to clean all the problem areas of the bottom from rust. This can be done in two ways.
With the help of a grinder. In this case, it is necessary to use both cutting and grinding wheels. During operation, be sure to follow all safety regulations. Cleaning hard-to-reach places from rust is best done by gas welding.
After the impact of rusty metal and corrosion, the edges of the surface to which the patches will be attached must be well cleaned. It is advisable to do this work with a grinder. Now you can cut out the patches from the metal and start welding. Metal cutting is best done with manual or electric metal shears. This will allow you to make blanks of the exact size and maintain smooth edges. Cutting metal, especially thin, by welding requires high qualifications.
