Many men perceive the car not just as a means of transportation, but as a complex mechanism that requires attention and care. The desire to eliminate faults without resorting to expensive services is commendable and economically justified. However, the path from a full amateur to a confident self-taught master requires discipline, theoretical training and, of course, practice.
Independent repair It starts long before you pick up the wrench. It is an immersion in the world of thermodynamics, mechanics and electrics. It is important to understand that modern cars are stuffed with electronics, but the basic principles of operation are not. ICE The internal combustion engine has been unchanged for decades. This is where you should start your training.
You should not expect an instant result. Mistakes are inevitable at the beginning of the journey, and you need to be prepared for them morally and financially. The main mistake of a beginner is an attempt to immediately climb into the overhaul of the engine without understanding the principles of its operation, which often leads to fatal breakdowns. Start small: replacing consumables, diagnosing simple nodes, and visually inspecting systems.
Basic theory: the device of the car and the principle of operation of the internal combustion engine
Before you turn the nuts, you need to clearly imagine what is under the hood. The engine is the heart of the machine, and its work is based on the combustion of the fuel-air mixture. This process drives pistons that rotate the crankshaft through the rods. Without understanding this cycle (intake, compression, workflow, release) further learning will be meaningless.
Besides the engine itself, it is critical to know the device. transmissionIt transmits torque to the wheels. Whether it is a manual transmission or an automatic, the principle remains similar: changing the gear ratio to adapt the engine speed to driving conditions. Also (cannot be ignored) cooling and lubrication systems, since their failure most often leads to overheating and jamming of the nodes.
- 🔧 The crank-shaking mechanism The basis for converting combustion energy into mechanical motion.
- ⚙️ Gas distribution mechanism (GRM) - is responsible for the timely supply of the mixture and the release of exhaust gases.
- ⚡ Ignition system Provides a spark to ignite the mixture at the right time.
Studying theory is best combined with looking at the diagrams of your particular car. Find it online. Service Manual (Service book) for your model. There are detailed painted all the nodes, moments of tightening of bolts and the sequence of disassembly. Abstract knowledge is good, but the specifics of your machine are more important.
Building a personal arsenal: tools for a beginner
The quality of repair depends on the tool used. Buying a professional set for thousands of dollars at the start makes no sense, but a cheap "China" from a supermarket can fail at the most crucial moment, ripping the edges of bolts. The optimal way is the gradual accumulation of a quality basic set.
First of all, you'll need it. cock-and-carpet The main sizes (from 8 to 24 mm). Cracks with a set of heads will significantly accelerate the dismantling process. Don’t forget the dynamometer key – it’s needed to tighten critical connections, such as GHB bolts or wheel nuts, to within a Newton meter.
☑️ Basic set of auto mechanic
Also (indispensable) diagnostic devices. The multimeter will allow you to check the voltage in the onboard network, the integrity of the fuses and the operation of the sensors. The compressometer will help to assess the condition of the engine cylinders, and the pressure gauge to check the fuel pressure will give an understanding of the pump system.
⚠️ Warning: Never use carob keys to unscrew heavily rusted or "stiffened" bolts. It is highly likely that you will tear the edges, and then it will be impossible to remove the fasteners without drilling. Use only the keys or heads.
Diagnosis with your own hands: how to find a malfunction
The ability to correctly diagnose a problem accounts for 80% of the success of a repair. Beginners often change the serviceable details at random, spending money and time. The professional approach begins with a survey of the driver (or analysis of his own feelings) and a visual inspection. Knocking, whistling, vibration or smoke from the exhaust pipe are all symptoms indicating a particular system.
Modern cars are equipped with a system OBD-IIIt's a system that stores error codes. To read them, it is enough to purchase a simple ELM327 scanner and install the application on a smartphone. However, blindly believe the codes can not: the error "poor mixture" can mean air sucking, and a faulty sensor, and problems with the nozzle. The master’s task is to find the true cause by the method of exclusion.
| Symptoms. | Possible cause | System system |
|---|---|---|
| Engine rotating | Breakdown of the ignition coil | Electrical equipment |
| Turning knock | SRUS wear and tear | Transmission |
| Whistling during acceleration | Weakening of the generator belt | Affixing equipment |
| Vibration on the steering wheel | Wheel imbalance | Chassis |
Why is he tripping the engine?
Trotting is not the work of the engine on all cylinders. Usually, one or more cylinders stop igniting the mixture. Reasons: no spark (candle, coil), no compression (burn valve), no fuel (nozzle).
Visual inspection often provides more information than a computer. Look for leaks of technical fluids, cracks in the pipes, oxidized contacts. The smell of burnt plastic or gasoline is also a powerful diagnostic tool that cannot be ignored.
First steps: Replacing consumables and maintenance
It is best practiced on scheduled maintenance. Replacing oil, filters and candles are safe operations that allow you to get used to the location of the nodes under the hood and master basic working techniques. It is difficult to break something completely if you act carefully.
Start with a replacement. motor-oil. To do this, you need to warm up the engine, unscrew the drain plug (caution, hot!), drain the working out, replace the oil filter and pour new oil. It is important not to drag the drain plug and use a new gasket. This is a simple but important procedure that forms the skill of working with fluids and tightness.
- 🛢️ Oil filter Change the oil with each change, lubricating the sealing gum with fresh oil.
- 💨 Air filter Check the condition every 10,000 km, change it if it is polluted.
- 🕯️ Ignition plugs - twist only on a cold engine, so as not to break the thread in the head of the block.
Before replacing any filter, take a picture of its position and connection of the pipes. This will help to avoid errors in the assembly, when in the head of porridge of parts.
Next, move on to replacing brake pads and discs. This is already a more responsible operation, requiring the use of a jack, tenants and an understanding of the caliper. Here it is important to observe cleanliness and prevent brake fluid from getting on rubber seals or paint coating.
Repair of suspension and chassis
The chassis takes on all the blows from our roads, so its elements wear out first. Knocking, creaking or pulling the car aside are signals to check the suspension. Repair here often comes down to replacing Silentblocks, ball supports, stabilizer racks and shock absorbers.
The main difficulty in repairing the suspension is rust And the bolts are boiling. Without high-quality penetrating lubricant (such as WD-40 or analogues), gas burner and sometimes Bulgarians here can not do. It is often easier to buy a lever assembled with new Silent Blocks than to try to press the old in garage conditions.
⚠️ Warning: After replacing any elements of the front suspension (levers, steering tips), be sure to make a collapse-de-convergence of the wheels. Otherwise, you will get uneven wear of rubber and the car is taken away.
Diagnosis of the running gear is carried out on the observation pit or lift. Use the mounting shovel to check the backlashes in the Silentblocks and balls. Swinging the wheel with your hands (with a hung car) will help to identify backlashes in the bearings of the hub or steering tips.
Autoelectric: the fight against "glitch" and wiring
Electricity is something that many novice auto mechanics fear. But logic rules here. If you can read electrical circuits and understand that current flows from plus to minus, overcoming consumer resistance, then 90% of the problems are solvable. The main enemies of electricians are the oxidation of contacts and the rubbing of wires.
To work with electricity, you will need a good multimeter. Learn to call the chains for a cliff and check for voltage. Often the problem lies in the bad "mass" (contact with the body). Cleaning contacts and treating them with a special lubricant for electrical contacts works wonders.
In electricians, the main thing is the method of exclusion. Check the circuit from the power source to the consumer, finding the point where the current is lost.
The situation is more complicated with electronic control units (ECU). Their repair requires deep knowledge and soldering equipment. However, if the block fails, it can often be replaced with a contract (used) or new one, sometimes requiring firmware. In this case, without a professional scanner can not do.
Where to find information and continue learning
Repair skills are not static, technology is changing. To stay informed, you need to constantly learn. The best teacher is the experience of others, so specialized forums on your brand of car are a gold mine of information. There you can find a breakdown of flights by specific "sickness" models.
Mechanics YouTube channels are also incredibly useful. The visualization of the process of removing the node is often clearer than the text in the manual. Remember, what you saw in the video for the same car may be different for yours. Always check the technical documentation.
Don’t be afraid to ask questions in communities, but formulate them competently. Instead of "the car does not go", write: "the engine starts, but dies when pressing the gas, no errors, the candles changed". The more accurate the description, the higher the chance to get good advice.
Best sources of information
1. Official Manuals (Service Manual) 2. Club forums of brand owners. 3. YouTube channels with rating (Autodoc, Garage 54, specialized channels by brands). 4. Electrical wiring circuits.
Car repair is a hobby that can become a profession or simply a way to save a family budget. Starting with oil change, after a year you can independently go over the suspension, and after a few years - replace the belt. The main thing is not to be afraid to get your hands dirty and constantly expand your horizons.
Where do I start if I don’t know anything about the machine?
Start by looking at your vehicle’s specific device. Find the manual, open the hood and just see where it is. Buy the book "Car Device" for a general understanding of the processes. Then try replacing the air filter or candles – these are safe operations to start with.
Do I need to buy expensive diagnostic equipment?
A multimeter and a simple ELM327 scanner are enough to start with. Professional scanners (Launch, Autel) are expensive and necessary for deep diagnostics of electronics. For training and basic repairs, a minimum set will be enough.
How not to break the thread during repair?
Use only a serviceable tool (licked keys will tear the edges). Do not use excessive force if the bolt does not go - it is better to splash penetrating lubricant and wait. When assembling, always use a dynamometer key for responsible nodes.
Should I repair the engine myself?
Without experience and a special tool (press, nutrient meter, dynamometer keys) to climb into the overhaul of the engine is not worth it. The risk of building the engine incorrectly is high, which will lead to expensive repairs. Limit yourself to replacing the attachments and gaskets.