O'Fallon Auto Repair

Introduction to Automotive Rocker Arms Rocker arms play a crucial role in the proper functioning of an engine's valve train system. These small yet vital components are responsible for transmitting the rotational motion of the camshaft to the valves, ensuring precise timing and control of the engine's intake and exhaust processes. Over time, rocker arms can experience wear and damage due to various factors, such as high temperatures, inadequate lubrication, or general wear and tear. What are Rocker Arms? Rocker arms might sound like a heavy metal band, but in the automotive world, they play a crucial role in the engine's performance. So, what are these rocker arms? Well, think of them as the middlemen between the camshaft and the valves. They transfer the motion from the camshaft to open and close the valves, allowing air and fuel to enter the combustion chambers and exhaust gases to exit. In simpler terms, rocker arms are like the maestro ... read more

The purge valve plays a crucial role in the proper functioning of a vehicle's evaporative emission control system. By controlling the flow of fuel vapor from the charcoal canister to the engine, the purge valve helps prevent harmful emissions from being released into the atmosphere while also ensuring optimal engine performance. However, like any automotive component, the purge valve can experience issues over time, leading to various problems and potential engine damage. In this article, we will explore the function and importance of the purge valve, common signs of a faulty valve, maintenance tips, when to seek professional help, and answer frequently asked questions to help you understand and address purge valve-related issues effectively. Introduction to Purge Valve Function and Importance Understanding the Role of the Purge Valve You know that feeling when you eat something that doesn't quite agree with your stomach? Your body just wants to get rid ... read more

The head gasket is an essential component in a vehicle's engine that plays a crucial role in ensuring efficient functionality. This part seals the engine's combustion chamber and separates the oil and coolant passages from the combustion area. Its role is critical in preventing the leakage of fluids and gases from the engine while maintaining the internal pressure. However, like any other engine component, the head gasket is susceptible to failure, which can cause significant damage to the engine and lead to costly repairs. In this post, we will explore what a head gasket is, its functions, causes of failure, symptoms of a blown head gasket, diagnosis, replacement, and preventive measures to avoid head gasket failure.   Introduction to Head Gasket in an EngineDefinition of a Head Gasket A head gasket is a vital component of an internal combustion engine that is situated between the engine block and cylinder head. It forms a seal between ... read more

If you're the proud owner of a car with keyless entry, then you're familiar with the convenience of a key fob. These little devices allow you to unlock and lock your car with just the push of a button. But what happens when your key fob stops working? Don't panic just yet - in this article, we'll explore some common reasons why your key fob may have stopped working and what you can do to fix it. What is a Key Fob? A key fob, also known as a remote key or smart key, is a small electronic device that communicates with your car's keyless entry system using radio waves. The fob contains a microchip that is programmed to communicate with your car's security system when you push a button. The communication between the key fob and the car is what allows you to unlock or lock your car doors, open the trunk, and even start your car's engine without inserting a key into the ignition. Dead BatteriesBattery Life Expectancy ... read more

If you have recently purchased a used car in Missouri and have experienced persistent problems or defects, you may be protected by the state's "Lemon Law." Under this law, you may be eligible to receive compensation or a replacement vehicle from the dealer or manufacturer. Understanding the Missouri Used Car Lemon Law What Is a Lemon Law? A lemon law is a legal provision that protects consumers who have purchased a defective vehicle that is still under warranty. Lemon laws aim to assist consumers in getting compensation for a faulty vehicle that does not meet the safety standards, quality standards, or performance standards set forth by the manufacturer. How Does the Missouri Lemon Law Apply to Used Cars? In Missouri, the lemon law applies to used cars that are still under the manufacturer's warranty. The law requires dealerships to disclose any repair history or defects that the vehicle has experienced. If you have purchased a used vehicle that i ... read more