Changing the spark plugs is usually always done in a tune up.
Cars are vital to the everyday life and functioning of many people. Hence, it is important to keep cars properly maintained in order to stretch out their lifespans. A tune up is a very basic, routine type of maintenance that many mechanics and garages offer, and that should be performed every 30,000 miles or so. What's involved in a tune up may vary from mechanic to mechanic, but there are some very basic things that are almost universally involved.
Fuel Filter Cleaning
The fuel filter is a device that filters out dirt and other particles from your fuel so it burns cleanly. During a tune up, a mechanic will either clean the fuel filter by using a special liquid or replace it entirely depending on its condition.
Spark Plugs and Wires
The spark plugs are located in each cylinder of your engine and provide the initial spark that it uses to burn fuel. The spark plugs can get worn out over time, however, and this can lead to a delay in your engine turnover or even misfires. Hence, spark plugs are usually checked and replaced in a tune up. The spark plug wires are often also replaced; these wires take electricity from the distributor and give it to the spark plugs to make the sparks.
Air Filter Change
Air filters can vary in shape and size, but they all serve the same function: to keep dirty and other particles out of your engine chamber. All engines need air to compress in order to run, and this is brought in via an air intake and filtered by the air filter's membrane. The filter is usually changed during a tune up.
Belt Checks and Replacement
The engine uses a variety of rubber belts to run, including timing belts and transmission belts. During a tune up, a mechanic will check them for cracks or general wear and tear to determine whether or not they need to be replaced. If a belt happens to snap while you're driving, the engine will cease immediately, so it's important that they are checked regularly and replaced if necessary.
Oil and Fluids
Car engines use a number of fluids to run properly, including power-steering fluid and transmission fluid. During a tune up your mechanic will usually refill every fluid, including the washer fluid, which is used by your windshield wipers to keep your windshield clean. A mechanic will also most likely change the oil, which is the lifeblood of a car's engine and provides a lubricant for all of the gears in the engine to turn.
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