Basic car maintenance is the set of routine checks and services that keep a vehicle safe, efficient, and reliable. A car is a system of connected parts, so a small problem in fluids, tires, brakes, or the battery can affect the whole vehicle. Learning these checks helps students understand how mechanical, electrical, and thermal systems work together.
Good maintenance also saves money by preventing avoidable wear and breakdowns.
Key Facts
- Tire pressure should match the vehicle placard value, often around 30 to 35 psi for many passenger cars.
- Engine oil reduces friction, carries heat away from moving parts, and should be checked with the dipstick on level ground.
- Distance traveled = speed x time, so a car driven at 50 mph for 2 h travels 100 miles.
- Fuel economy = distance traveled / fuel used, such as mpg = miles / gallons.
- Brake pads create friction against rotors, converting kinetic energy into thermal energy.
- A 12 V car battery supplies electrical energy for starting and helps stabilize the vehicle electrical system.
Vocabulary
- Engine oil
- A lubricating fluid that reduces friction, helps cool engine parts, and protects metal surfaces from wear.
- Coolant
- A fluid mixture that absorbs heat from the engine and releases it through the radiator.
- Tire pressure
- The amount of air pressure inside a tire, usually measured in pounds per square inch or psi.
- Brake pad
- A replaceable friction part that presses against the brake rotor to slow the wheel.
- Battery terminal
- A metal connection point on a car battery where electrical cables attach to the vehicle.
Common Mistakes to Avoid
- Checking oil while the car is parked on a steep slope gives a false dipstick reading because the oil pools to one side of the oil pan.
- Inflating tires to the number printed on the tire sidewall is wrong because that number is the maximum pressure, not the recommended operating pressure for the vehicle.
- Ignoring dashboard warning lights is unsafe because they often indicate problems with oil pressure, charging, brakes, or engine control systems before a failure becomes severe.
- Adding only water to the cooling system for regular use is a mistake because proper coolant helps prevent overheating, freezing, and corrosion.
Practice Questions
- 1 A car travels 180 miles and uses 6 gallons of fuel. What is its fuel economy in miles per gallon?
- 2 A tire should be inflated to 32 psi but measures 26 psi. How many psi must be added to reach the recommended pressure?
- 3 A driver notices squealing brakes, a low tire pressure light, and dark engine oil. Explain which maintenance checks should be done first and why each problem matters for safety or reliability.