When the thermometers drop below zero, every driver feels that slight cramp in their stomach before turning the ignition key. The cold is a merciless litmus test for the condition of the car and often turns even small maintenance lapses into a serious problem. Experts point out the five main critical points that can leave the engine silent on frosty mornings.
First on the list of suspects is always the battery
In seriously sub-zero temperatures, its capacity collapses by 30% to 50%, and sometimes more. If the battery is already worn out or nearing the end of its life cycle, it simply does not have the necessary starting current to turn the starter and “wake up“ machine.
The quality and type of fuel take the second position
In diesel engines, the use of unsuitable seasonal fuel leads to its thickening and the release of paraffins, which completely block the fuel system. Gasoline engines are not insured - the presence of impurities or condensation (water) in the tank worsens the ignition of the mixture and makes starting a mission impossible.
The third factor, which is often underestimated, is the viscosity of the engine oil
Old or incorrectly selected fluid thickens in extreme cold, turning into a sticky mass that provides enormous resistance to moving parts. This puts an incredible load on the starter and exhausts the already weakened battery.
The fourth reason lies in the “heart“ of the ignition system
Worn spark plugs, microcracks in the cables or the presence of moisture are critical factors. In cold weather, a much stronger and more stable spark is needed to ignite the fuel-air mixture, and any weakness here leads to an unsuccessful start attempt.
Last but not least is the electronics
The cold exacerbates problems with poor contacts, oxidized cables and defective sensors. A faulty temperature sensor or crankshaft position sensor can mislead the car's computer and prevent starting completely, even if everything else is in order.
To save yourself headaches and delays, preventive preparation is mandatory. Checking the battery, using quality consumables that comply with the manufacturer's instructions, and regular technical inspection are the only insurance against the ice trap of winter.