A long-term vehicle downtime is always stressful for all components and assemblies, but it is the power unit that is most at risk: Oil drains into the crankcase, leaving rubbing fumes unprotected, fuel loses its properties, and the battery inevitably discharges. Owners often underestimate the consequences of parking, trying to turn the starter right away, which can lead to serious breakdowns and expensive repairs.
Before you try. triggerAn unprepared start can be fatal to the cylinder piston group, especially if the oil has completely left the working surfaces. In this article, we will discuss a step-by-step algorithm of actions that will minimize risks and safely return the machine to operation.
The main goal of starting after winter or long-term storage is not just to get the engine running, but to ensure that all components are instantly lubricated, and ignoring the preparatory stages often leads to bullying, liner flipping, or fuel system failure. Gasoline Diesel units require an individual approach, but the basic principles of preparation remain similar for all types of ICE.
Visual inspection and preparation of the under-hood space
The first thing you have to do when you open the hood is to look carefully around the power unit, look for traces of leakage of technical fluids, for rodents that may have chewed on the wiring, or for foreign objects, and any little thing left unattended can cause a short circuit or fire on the first start.
Pay special attention to the state drive-belt The rubber will eventually dry up and crack, losing its elasticity; if you see deep cracks on the belt, you can try to start it and damage other nodes; the nozzles should not be hard like a rock or sticky to the touch.
⚠️ Warning: If you find traces of rodent habitat (nests, droppings, bitten wires), do not try to start the engine. Clear the hood and replace damaged wiring, as the insulation may have been broken in hidden places.
Check the level and condition of all technical fluids. The oil in the engine could oxidize or gain condensation, turning into an emulsion. The brake fluid is hygroscopic and could draw water, which is dangerous for the braking system. Antifreeze should not have a rusty hue or oily film on the surface.
Inspect the air filter: If it is wet or damaged by rodents, replace it before starting to avoid debris getting into the cylinders.
Diagnostics and restoration of the electrical system
The most common problem after downtime is a fully discharged battery. battery If the battery was depleted, especially in winter, its properties could be irreversibly degraded by the sulfation of the plates.
Before installing a charged battery or connecting the launcher, be sure to clear the terminals of oxide. Plaque salts dramatically increases resistance in the starter circuit, which may cause the motor to fail even with a serviceable battery. Use hot water and a brush to clean the contacts.
Check the integrity of high-voltage wires and ignition coils. In the high humidity conditions that often prevail in garages, insulation breakdown becomes common.
It's important to make sure the starter is working properly. If you hear a click when you turn the key, but the crankshaft is not rotating, you may have stuck your brushes or oxidized the contacts of the retractor, sometimes a slight tap on the starter body helps to temporarily restore contact, but this is only a measure for getting to the service.
Working with the fuel system and removing old gasoline
Modern fuels have a limited shelf life; ethanol-laden gasoline begins to delaminate and oxidize in 3-6 months; diesel fuel can paraffinize or get clogged with algae in winter; old fuel is a direct route to clogging the nozzles and breaking the fuel pump.
If there's fuel left in the tank that's been standing for more than six months, it needs to be drained, it could form a condensate in the tank that will settle at the bottom and enter the power supply, and for diesel engines, this is critical, because the water causes corrosion of the plunger vapors of the TNVD.
- 🛢️ Remove the fuel filter and replace it with a new one, as the old one may have dried or clogged with the decay products of the fuel.
- ⛽ Pour fresh fuel of high quality, preferably with the octane number recommended by the manufacturer.
- 🔧 Check fuel lines for cracks and stains, especially if rubber hoses were used.
For injection engines, it's useful to turn on the ignition several times without starting the starter to raise the pressure in the ramp. You'll hear how the gas pump will work, which will fill the system with fresh fuel and displace the remnants of the old one. In diesel engines, you may need to pump the system through the pear or a special pump on the filter.
What to do if the fuel smells like varnish?
If the gasoline has a sharp odor of varnish or a dark color, it has oxidized. Using this fuel will cause resins to form on the valves and injectors. Pour it out completely and rinse the tank.
Cylinder lubrication and compression check
The most critical moment is the first seconds of the engine. oil-pump If you don't put pressure on it, all the rubbing parts will be dry friction, and to minimize wear, experienced mechanics recommend that you pre-lubricate the cylinders.
To do this, you twist the spark plugs (or nozzles in a diesel) and pour 5-10 grams of engine oil into each cylinder, and then you manually turn the crankshaft several times, which will create an oil film on the cylinder walls and piston rings.
| Type of engine | Lubrication method | Cover time. | Action after lubrication |
|---|---|---|---|
| Gasoline | Through candle wells | 15.30 minutes. | Scrolling with a candleless starter |
| Diesel | Through the nozzle holes | 30-60 minutes. | Fuel pumping and scrolling |
| rotary | Oil mixture in the pipe | 10-15 minutes. | Careful scrolling |
After aging, you need to twist the candles and spin the engine with a starter for 5-10 seconds, which will disperse the oil through the channels of the lubrication system and remove the excess oil from the cylinders, only after this procedure you can screw the candles in and try to start the engine.
⚠️ Warning: When scrolling the engine without candles, be sure to turn off the ignition module or fuel pump to exclude an accidental spark or fuel supply.
First-Start Algorithm and Warm-up
When all the preparatory stages are complete, there comes a moment of truth: don't rush to turn the starter for a long time. The first start should be short-term to check if the engine is catching and if there is no extraneous noise. If the engine does not start on the first try, let the starter cool down for a minute.
When you're successful, don't gas. Let the engine run at idle speed. During this time, listen carefully to the unit. Knock, metal ringing, or triplets will indicate problems that require immediate shutdown. Oil pressure should rise to normal in the first seconds of operation.
☑️ Checklist before first launch
The heating should be smooth. You should not go straight to the road or give high speeds. Thermal clearances in the engine should come back to normal, and all liquids should warm up to operating temperature. diesel enginesThey are sensitive to cold stress.
The first principle of the first start after idleness is to get underheated than to overload a cold engine.
Frequent problems and methods of their elimination
Even if all the rules are followed, there can be difficulties: often after starting, the engine stalls or runs unstable, this can be due to the sucking of unaccounted air through the drying pipes or a malfunction of the idle regulator.
If the engine is Troit, check the candles and the coils, because humidity could have knocked them out. In diesels, the fuel system is often suffocated, and it's worth checking the crankshaft position sensor, which may have oxidized.
The appearance of smoke from the exhaust pipe is an alarming signal. White smoke can indicate the entry of antifreeze into the cylinders (breaking the gasket gasket), blue - for a combustible of oil, and black - for a rich mixture or problems with injectors.
Conservation of the engine for the future
To avoid problems with starting in the future, the car needs to be properly prepared for long-term storage. If you know that the car will not be in operation for several months, follow a series of procedures, which will save your nerves and money on the next intensive care.
First of all, you need to replace the oil and filters. Used oil contains combustion products and acids that destroy the metal when you are down. Pour fresh oil to the maximum level. It is also recommended to fill a full tank of fuel with a stabilizer to prevent oxidation.
- 🔋 Remove the battery and store it in a warm place, periodically recharge.
- 🚗 Lift the car to the jacks or remove the wheels to unload the suspension and tires.
- 🧼 Treat rubber seals with silicone lubricant to prevent drying.
Do I need to turn the engine manually when preparing?
Yes, if you can, it's useful to turn the crankshaft by hand behind the pulley a few revolutions before starting, which will help distribute the oil to the friction nodes. However, on modern cars with a dense layout, this is difficult to do, so the method of scrolling the starter without candles is more practical.
Can I use a booster instead of charging?
You can use a booster, but only for short-term start-ups, if the battery is deeply discharged, it needs a full-scale low-current charge, and a start-up charger in start-up mode gives high current, which can be harmful to an old battery, but is acceptable in an emergency.
How long should the engine run after the first start?
After the first successful start, let the engine run at idle speeds for 10-15 minutes, during which time check for no leaks, warm up the transmission (for automatic transmission) and make sure that the coolant temperature rises, and the cooling fan turns on on on the timing.
What to do if the oil pressure lamp burns after starting?
If the oil pressure lamp does not go out 3-5 seconds after starting, immediately turn off the engine! Operating the engine without oil pressure will lead to major repairs. Check the oil level, pressure sensor or condition of the oil pump.