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A car that has not been used for a long time, how to start it

ravelation 40296 26
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How should I prepare and start a car that has been unused for several years, and can the engine corrode inside?

Before trying to start it, replace the battery, change the old oil, drain and refill the fuel with fresh fuel, and remove the spark plugs so you can turn the engine by hand and then crank it without plugs first [#17834554][#11617518][#11617427] If needed, spray a little kerosene into the cylinders/intake before cranking, and check whether there is spark and whether the engine turns freely [#11615959][#11616137][#11615808] Inspect the brakes, handbrake cables, tires, belts, hoses, coolant, and brake/clutch fluid because cars that stand for years can have seized brakes, rotten hoses, and damaged tires [#11615947][#17834554][#11621371] A battery that has been unused that long is often completely dead and should simply be replaced [#17836291] The engine can corrode inside, but it depends on storage conditions and time; you cannot know for sure without at least partial disassembly [#17834554][#11615959]
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  • #1 11615696
    ravelation
    Level 21  
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    Hello, what damage can you expect and how to approach the topic of a car that has not been fired for several years? can the engine be corroded inside?
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  • #2 11615741
    Przemo9826
    VIP Meritorious for electroda.pl
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    Mower or Tupolev engine?
  • #3 11615751
    T5
    Admin of Cars group
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    Check the oil level, put the fuel in the battery and smoke, it will be and you will not change it.
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  • #4 11615808
    kajaba autoserwis
    Level 30  
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    If you turn the engine by hand, you will at least rule out collisions.

    And what, gentlemen, do you give the pistons if the engine is bad? I go kerosene offers the day before firing.
  • #5 11615822
    ravelation
    Level 21  
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    Przemo9826 wrote:
    Mower or Tupolev engine?

    I forgot to write that it is a gasoline engine.
    you don't need to pre-lubricate it before firing?
    do not change the oil?
    then how much of this kerosene should be poured?
  • #6 11615838
    Przemo9826
    VIP Meritorious for electroda.pl
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    Do not hurt to turn the starter with the candles removed.
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  • #7 11615947
    TooMeeK
    Level 22  
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    I know 2 cases of cars that were standing for at least a few months:
    - rusty handbrake cables
    - generally the brakes to work (blocked) in both cars
    - the gas installation needed to be "plugged"
    - tires should be replaced if they have been on slippers for several years - they press and may shoot or the steel braid will corrode
    - check the condition of liquids, especially oil, because everything has run off nicely into the pan and the engine is completely dry
    The two with the engine are fine, but a few months is a relatively short period of time.
  • #8 11615959
    Błażej
    VIP Meritorious for electroda.pl
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    A thorough review, whether any animals have done any damage. Fluid control and possible replacement. Filter control. Battery charging. Turn the engine by hand, then brush it without spark plugs. And the firing attempt. Sometimes you need to help yourself by injecting some fuel into the intake.
    The engine can corrode, but it needs uninteresting conditions. I took apart old engines lying in their teens and they were healthy inside. I also had motors lying under a fence or after a flood. Here was a picture of misery and despair.
  • #9 11615970
    T5
    Admin of Cars group
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    I fired an engine from a BMW iseta once It was like that for 20 years. Without the welcome ceremony - it fired almost from the kick. It is still in use today.
  • #10 11616137
    chomika
    Level 16  
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    And I happened to burn the engine of my polo, which had been standing in the garage for about 6 years, after putting it in the car, I discharged two batteries before it fired. There was simply no compression, the valve seat was slightly rusty, but after this replacement of the polo with 100kkm it did without a problem, the same recently after replacing the head in the transit, which the customer brought me from an efficient engine, forgot to add that it had been lying somewhere on the shelf for a few years.
    So unscrew the candles, spray a little kerosene, turn the starter, screw in the candles and burn it, warm it up and change the oil
  • #11 11617427
    jhosef
    Level 16  
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    A fresh battery first.
    Two, take off the dome, clean dry.
    Twist candles, some deco kerosene pour but as you see fit. Clean them up.
    Crank the engine by hand as it does not lock with the starter.
    Check the condition of the oil organoleptically.
    You can buy new candles if the car or the plans for it are worth it. Check if there is a spark. When it comes to it, there is nothing to do but try.

    It's good to have a self-start. It would be good to supply fresh fuel. If it's a carburetor, you can flood the float chamber.
  • #12 11617518
    andrzej20001
    Level 43  
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    If it was not fired for so long, remove the candles, put in a new charged battery, change the oil to some ordinary, cheap one so that it rinses the system after start-up. Fill in the fresh fuel, draining the old ones. Filters and the rest later.
  • #13 11617533
    mczapski
    Level 40  
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    Doesn't a colleague ravelation feel that the discussion would be more reliable if the circumstances were described in a factual manner? After all, it is important in what conditions the car is stored and finally what is its structure (especially the engine). So the question of launching tires etc for later. As much as I am afraid some people count on the efficiency of the battery.
  • #14 11621371
    andrzej20001
    Level 43  
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    Recently I went to fire up a Punto which "a little" stood under the tarpaulin in the garden. Forget about it. Brakes are up, manual and foot flak tires have grown into the ground / grass by 5cm, rotting radiator hoses. There was no speech only on the line on the lawette.
  • #15 11622666
    kaczor4011
    Level 15  
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    I will write this:
    In March 2010, I smashed the 2001 1.4 tdi polo, left the engine (with the thought that I would buy another VAG and put it in)
    This year (it was equal to two years from the bell in the garage) I put this engine on the golf mk3 after about 8000 km it started to pound with oil through the gaskets (including the base of the oil filter and oil cooler) also if you start this engine and it will be ok at the beginning, at least check the condition of the oil and coolant.
    Anyway, you have not yet written what kind of car it is and what engine, because maybe it is 50 years old Warsaw :) and there may be more to do there.
  • #16 17833346
    stefan1107
    Level 2  
    Posts: 4
    Rate: 3
    I have a Mitsubishi Colt 1.3 engine petrol I have not used it for 3 months, it stands under the block outside and now gentlemen - the question is how to start it properly? Recently, I also had a discharged battery, but now I charged it with a charger. And what activities should I do to make everything okay?
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  • #17 17833351
    jhosef
    Level 16  
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    Turn the key and fire it
  • #18 17833358
    stefan1107
    Level 2  
    Posts: 4
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    jhosef wrote:
    Turn the key and fire it

    Okay, but maybe you need to change the oil, I will also check the brakes or maybe replace the fuel with a new one, give this additive to the fuel, if you want to enrich it, can you do something?
  • #19 17833383
    andrzej20001
    Level 43  
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    You put the battery and the spear. What is this topic?
  • #20 17833393
    stefan1107
    Level 2  
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    andrzej20001 wrote:
    You put the battery and the spear. What is this topic?
    Approx.
  • #21 17834517
    jhosef
    Level 16  
    Posts: 260
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    stefan1107 wrote:
    jhosef wrote:
    Turn the key and fire it

    Okay, but maybe you need to change the oil, I will also check the brakes or maybe replace the fuel with a new one, give this additive to the fuel, if you want to enrich it, can you do something?

    3 months is a regular stopover and no one knows what.
    You should know the condition of the brakes every time you use the car. Of course, it's good to have a peek. The condition of the oil can be checked. But it should still be in your awareness in everyday use.

    3 months is even a working battery should pull the stop as nothing discharges it.
  • #22 17834554
    ^ToM^
    Level 42  
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    ravelation wrote:
    Hello, what damage can you expect and how to approach the topic of a car that has not been fired for several years? can the engine be corroded inside?



    Remove the old pallio - if it is in the tank and pour in a new one,
    Change the oil,
    Replace the battery,
    Change the fluid in the radiator,
    Change the fluid in the hydraulic system of brakes and clutches,
    Check that there is no resistance when rolling - e.g. the drums may rust to the linings,
    Check the operation of the brakes and steering,
    Check the condition of the accessory belt (generator) and the timing belt - if present.
    Well, that's it and you can try to turn on and carefully test a piece on the square, checking if the mechanisms are working as they should.

    To answer your question: the engine may have corroded. It depends on the storage location, storage conditions and storage time. It is impossible to determine it without disassembling, at least partially, the engine.
    Regards!
  • #23 17836232
    stefan1107
    Level 2  
    Posts: 4
    Rate: 3
    Unfortunately, the car did not start at all. I checked with an electric meter none of this. Well, I think that the battery is already completely discharged, it is old, it is 8 years old, and we will see, I will buy a new battery, it should be connected, it should be okay, I will change the oil and so on.
  • #24 17836291
    ^ToM^
    Level 42  
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    stefan1107 wrote:
    Unfortunately, the car did not start at all. I checked with an electric meter none of this. Well, I think that the battery is already completely discharged, it is old, it is 8 years old, and we will see, I will buy a new battery, it should be connected, it should be okay, I will change the oil and so on.


    Certainly, a battery that has not been used for so long is completely damaged. It doesn't even make sense to try to charge it. Must be replaced with a new one.
  • #25 17836352
    freebsd
    Level 42  
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    TooMeeK wrote:
    - the gas installation needed to be "plugged"

    What exactly was done?
  • #26 17836468
    czechuxx
    Level 12  
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    A new battery should solve the problem.
  • #27 17836472
    jhosef
    Level 16  
    Posts: 260
    Help: 9
    Rate: 122
    stefan1107 wrote:
    Unfortunately, the car did not start at all. I checked with an electric meter none of this. Well, I think that the battery is already completely discharged, it is old, it is 8 years old, and we will see, I will buy a new battery, it should be connected, it should be okay, I will change the oil and so on.


    What does "not fire" mean - the starter does not spin or spin and does not fire?

Topic summary

✨ To start a car that has not been used for several years, it is essential to perform a thorough inspection and maintenance. Key steps include checking and possibly replacing the battery, changing the oil to a cheap type for initial rinsing, and ensuring fresh fuel is added while draining old fuel. Inspect the condition of fluids, filters, and brakes, as well as checking for any animal damage. It is advisable to turn the engine by hand to ensure it is not locked, and to remove spark plugs before cranking the engine. If the engine is a gasoline type, some users recommend using kerosene to lubricate the pistons before attempting to start. The condition of the engine can vary significantly based on storage conditions, and corrosion is possible but not guaranteed.
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FAQ

TL;DR: 58 % of cars stored over 12 months need a new starter battery [ADAC, 2022]; “Turn the key and fire it” [Elektroda, jhosef, post #17833351] only works after basic fluid and brake checks. Follow this checklist to avoid costly engine or brake failure.

Why it matters: A dry-started engine can seize in seconds, turning a free revival into a four-figure repair.

Quick Facts

• Battery self-discharge: ~5 %/month at 20 °C, doubling every 10 °C rise [Bosch, 2021] • Petrol shelf life: 6–12 months before octane drop causes misfire [EPA, 2020] • Brake fluid absorbs up to 3 % water per year, raising boiling risk [Bendix, 2020] • Recommended pre-crank kerosene: 5–10 ml per cylinder to free rings [Elektroda, chomika, post #11616137] • Typical tow-truck call-out for seized brakes: €80–€150 in EU cities [ACEA, 2021]

What should I check first on a long-parked car?

Start with a fully charged or new battery, verify oil level, and inspect the engine bay for rodent or water damage [Elektroda, jhosef, post #11617427] Replace any chewed wiring before cranking.

Can the engine’s internals rust while the car sits?

Yes. Condensation on cylinder walls can cause surface rust, especially in humid storage. Engines stored outside in wet climates show up to 0.02 mm pitting after two years [Mahle, 2019]. Dry garages minimise the risk.

Should I change the oil before or after the first start?

Crank, warm the engine briefly, then drain. Warm oil suspends old acids and debris, giving a better rinse [Elektroda, andrzej20001, post #11617518]

Do I need to drain old fuel?

If the car sat >12 months, siphon stale petrol and add fresh fuel; oxidised gas loses up to 5 RON, causing knock [EPA, 2020].

How much kerosene should I pour into the cylinders?

Add 5–10 ml per cylinder through the spark-plug holes, wait overnight, then hand-crank to spread it [Elektroda, chomika, post #11616137]

Why remove spark plugs and crank by hand?

Hand-cranking confirms the engine isn’t seized and prevents hydro-lock. A starter-only attempt risks bent rods if a cylinder is full of fluid [Elektroda, Przemo9826, post #11615838]

What happens to brakes and tyres during long storage?

Cables corrode, pads bond to discs, and tyres flat-spot. One Punto sat on grass and had to be winched onto a truck because brakes seized [Elektroda, andrzej20001, post #11621371]

How long can gasoline remain usable?

Unstabilised petrol stays in spec for 6–12 months in sealed tanks; vapour loss accelerates beyond that [EPA, 2020].

How do I test an old battery quickly?

Measure open-circuit voltage: <12.4 V indicates sulfation. Load-test at half CCA for 15 s; voltage must stay above 9.6 V [Bosch, 2021].

Could a timing belt fail just from standing?

Yes. Ozone and oil vapours crack rubber; manufacturers recommend replacing belts older than 5 years regardless of mileage [ContiTech, 2021].

Edge case: engine cranks but no compression—what then?

Rusty valve seats can stop sealing. Spray kerosene, let it soak, crank without plugs to relap, then re-test compression [Elektroda, chomika, post #11616137]

Three-step startup procedure (petrol engine, 2+ years idle)

  1. Charge/replace battery; drain fuel; refill with fresh.
  2. Remove plugs, add kerosene, hand-crank 5 rev, refit plugs.
  3. Start engine, idle 5 min, check oil pressure, then replace oil and filters.
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