Always keep the passage to the exit clear.
When the engine is running (especially in warm-up modes) carbon monoxide (CO) is released - a poisonous gas without color or smell. Carbon monoxide poisoning (carbon monoxide) even in an open garage, so before starting the engine, ensure that the exhaust gases are removed outside the garage. For example, with a hose, putting it on the exhaust pipe. In the absence of forced exhaust, the engine can only be started for a short time. In this case, the exhaust system and its connection to the hose must be sealed!
When repairing the engine fuel system, be careful: gasoline can get on the hot exhaust manifold and cause a fire. Do not turn on (and don't turn it off) electrical appliances of the car if gasoline has been spilled nearby - a spark (even when the negative terminal is removed from the battery) can cause an explosion.
Keep a bucket of water and a fire extinguisher handy during welding (carbon dioxide is better). Before doing this, disconnect all electronic control units and the battery from the vehicle's electrical system, and place the "ground" contact of the welding wire as close as possible to the welding site. Make sure that the current does not pass through the moving parts (bearings, ball joints) or threaded connections - they may be damaged.
When repairing electrical equipment circuits or when there is a risk of damage to them (welding, straightening near wire harnesses) disconnect the negative terminal of the battery.
When servicing the contactless ignition system, do not touch high-voltage wires while the engine is running or when starting it.
When checking the ignition system for a spark, secure the high-voltage wire near the ground with electrical tape or a clothespin, but do not hold it with your hands. If you need to turn off one of the cylinders with the engine running, short-circuit the high-voltage terminal to the ground with a screwdriver or a piece of suitable wire. In this case, first securely secure the shunt wire to the ground, and then bring it to the tip of the high-voltage wire (it's better not to touch it with your hands).
If you prefer to disconnect the high-voltage wires to disable the cylinders (and this can lead to burnout of the insulation of the ignition coil, rotor and distributor cap), then it is better to disconnect them not from the spark plugs, but from the ignition distributor - this way the likelihood of getting an electric shock is much lower.
To avoid damaging your hands while working, wear gloves (leather is better). To protect your eyes, wear special glasses with side shields.
Perform electric welding work in thick clothing (better than tarpaulin), buttoning the sleeves and collar.
If possible, use diamond or hydraulic jacks instead of standard ones - they are more stable and reliable. Do not use faulty tools: open-end wrenches with an "open" mouth or crushed jaws, screwdrivers with a rounded, twisted slot or improperly sharpened, pliers with poorly secured plastic handles, hammers with an unfixed handle, etc.
Before lifting the vehicle on a jack or lift, make sure that the corresponding power elements of the body (floor reinforcements, thresholds) are strong enough. Use only the standard support points to lift the car. It is prohibited to hang the car on two or more jacks - use serviceable industrial stands ("tripods") and reliable wheel stops.
It is prohibited to load or unload a vehicle that is on a jack, to get into it, to remove or install the engine if there are people under the vehicle. When repairing a vehicle with the engine or axle removed, keep in mind that the axle weight distribution has changed. When hanging on a jack, such a vehicle may fall. Work only on a level, non-slip surface, place reliable stops under unhung wheels.
Oils, especially waste oils, when in regular contact with them, contribute to the development of skin diseases, including cancer. If oil gets on your hands, wipe them with a rag and then wipe them with a special hand cleaner (or sunflower oil) and wash with warm water and soap or dishwashing liquid. Do not wash your hands with hot water, as this will easily allow harmful substances to penetrate the skin. If gasoline, kerosene or diesel fuel gets on your hands, wipe them with a clean cloth and then wash with soap.
When working with a battery (electrolyte is almost always present on its surface) be sure to wear glasses and protective clothing, including rubber gloves.
Electrolyte causes redness and burning when it comes into contact with the skin. If electrolyte gets on your hands or in your eyes, wash it off with plenty of cold water (do not wash with soap!), then hands should be washed with a solution of baking soda or ammonia.
Remember that sulfuric acid, even in small concentrations, destroys organic fibers – take care of your clothes.
Coolant (antifreeze) contains ethylene glycol, which is toxic when ingested and (to a lesser extent) in contact with skin. In case of poisoning with antifreeze, you should immediately induce vomiting, wash out the stomach, and in case of severe poisoning, take a saline laxative and consult a doctor. If it gets on your hands, wash with plenty of water and soap. The same applies to brake fluid.
Do not open the cooling system caps on a hot engine.
Gasoline, diesel fuel, oils, brake fluid are almost not recycled naturally. Brake fluid contains toxic glycol ethers; oils - spent mineral and organic additives, soot, resins, wear products. Lead batteries, in addition to lead, contain antimony and other elements that form compounds that are highly toxic to living organisms and remain in the soil for a long time. Leave spent materials at disposal points.