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**Summary**
Summer brings high temperatures and heavy rainfall, making it a critical time for car performance. Many common vehicle issues tend to appear during this season, but by observing these problems carefully, we can identify patterns and take preventive measures. This helps ensure our vehicles remain reliable and safe. The most vulnerable systems in summer are the cooling system, air conditioning, fuel supply, and engine components. Regular inspection and maintenance are essential to avoid breakdowns.
**Cooling System**
One of the most frequent issues in summer is "boiling water" in the radiator, which can lead to overheating and engine damage. First, check other components like fuel, engine oil, spark plugs, coolant, ignition timing, and idle air-fuel ratio. Then inspect the cooling system thoroughly. Start by checking the radiator: if one side is hot while the other is cold, there may be a blockage. Use a pressure hose to flush the tank, and consider adding a cleaning agent if needed. Next, examine the thermostat. Removing it may seem like a solution, but it can actually harm the engine by causing improper temperature regulation. A faulty thermostat can prevent proper coolant circulation. Also, check the water pump for leaks, impeller corrosion, or loss of rotation. Fans play a crucial role in cooling; some use electromagnetic or silicone oil clutches, both of which can fail due to leaks or electrical issues. Don’t forget to check the exhaust system, oil cooler, and airflow guide covers for optimal heat dissipation. Regular maintenance includes checking coolant levels, fan belt tightness, thermostat function, and cleaning the system to prevent scale buildup.
**Air Conditioning System**
In summer, the air conditioning system often underperforms. To keep it running smoothly, regular checks are necessary. Feel the temperature of the refrigerant lines: the low-pressure line should be cool, while the high-pressure line should be warm. Look for signs of refrigerant leaks, such as oil stains on connections or condenser surfaces. You can also use soapy water to detect bubbles. Check the sight glass on the dryer for bubbles or clarity, which can indicate refrigerant levels. Ensure the system pressure is within normal ranges (0.15–0.2 MPa for low pressure, 1.35–1.55 MPa for high pressure). If the pressure is too low or too high, it could signal a compressor issue, dry filter, or expansion valve failure. Electronic control systems in modern cars must also be checked for reliability to maintain comfort and efficiency.
**Fuel Supply System**
High temperatures can cause vapor lock in the fuel system, where gasoline evaporates and creates air pockets, disrupting fuel flow. To prevent this, keep the fuel pump cool using a wet cloth, or move the car to a shaded area. Adjust the pump’s location away from the exhaust and add a heat shield. Installing one-way valves can also help reduce vapor formation.
**Engine and Lubrication System**
Engines work harder in summer, especially in luxury vehicles. Use high-viscosity oil, shorten oil change intervals, and replace grease with high dropping point compounds. For transmissions and differentials, use thick gear oil, and choose brake fluid with a higher boiling point. Luxury cars benefit from high-quality antifreeze and synthetic engine oils, ideally 15W40 or 5W50.
**Charging System**
The battery is prone to overcharging in summer, leading to electrolyte evaporation and plate damage. Monitor the battery level and add distilled water as needed. Keep the vent open and adjust the generator regulator to reduce charging current.
In conclusion, maintaining your car properly during summer is key to avoiding breakdowns. With regular inspections, timely repairs, and smart driving habits, you can ensure your vehicle performs well through the hottest months.
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