O'Fallon Auto Repair

When it comes to your vehicle's performance, many components work together harmoniously to ensure a smooth ride. One of the most crucial, yet often overlooked, parts is the universal joint, commonly known as the u-joint. In this blog post, we will delve into what a u-joint is, its components, how it functions within your vehicle, and the signs of a failing u-joint. What is a U-Joint? A universal joint is a flexible coupling that connects two rotating shafts, allowing for the transfer of torque and the accommodation of angular misalignment between the shafts. In vehicles, u-joints are primarily found in the driveshaft, which transmits power from the transmission to the rear axle (in rear-wheel-drive vehicles) or to the front wheels (in all-wheel-drive vehicles). Components of a U-Joint A typical u-joint consists of several key components: Cross: The central piece of the u-joint, usually made of steel, which has four trunnions protruding from i ... read more

As the seasons transition from the warmth of summer to the crispness of fall and then back to the unpredictability of spring, Missouri residents experience some of the most fluctuating temperatures in the country. These changes can significantly affect vehicle performance, particularly the health and inflation of your tires. Understanding how cold weather impacts tire pressure can help you ensure a safer, more efficient ride. The Impact of Temperature on Tire Pressure Tire pressure naturally decreases as temperatures drop. For every 10°F change in temperature, tire pressure can change by about 1 PSI (pound per square inch). This means that as winter approaches and temperatures fall, the air inside your tires contracts, leading to lower pressure. Conversely, when the weather warms up, tire pressure can increase. This fluctuation is especially relevant in Missouri, where fall and spring months can see daily temperature swings, making regular tire pressure checks es ... read more

As the days grow shorter and the air turns crisp, many drivers may find themselves faced with an unexpected challenge: a failing car battery. Before winter settles in, it’s crucial to assess the health of your battery to ensure a smooth and reliable driving experience. At Hillside Auto Repair, we understand the importance of battery maintenance, especially as temperatures begin to drop. This post will delve into the signs of a failing battery, how often you should consider replacement, and how we can assist with battery testing and replacement. Signs of a Failing Battery Recognizing the signs of a failing battery can save you from being stranded on a chilly morning. Here are the key indicators to watch for: Slow Engine Crank: If your engine is slow to start or you hear a sluggish crank when turning the key, this is often a sign that your battery is losing its charge. Check Engine Light: A lit check engine light may indicate a battery issue. While it could be ... read more

When it comes to the smooth operation of your vehicle, few systems are as critical as the transmission. This complex assembly ensures that power from the engine is efficiently transmitted to the wheels, allowing for seamless acceleration and deceleration. In this blog post, we’ll delve into the intricacies of automatic transmissions, explore their components, discuss symptoms of a failing transmission, highlight the importance of transmission fluid maintenance, and explain how Hillside Auto Repair can help keep your transmission in top shape. Components of an Automatic Transmission An automatic transmission comprises several essential components that work together to facilitate smooth gear shifts. Here are the key parts: Torque Converter: This component transfers engine power to the transmission while allowing the vehicle to come to a stop without stalling. Planetary Gear Sets: These are responsible for providing different gear ratios. The arrangement of gears ... read more

In the world of automotive engineering, every component plays a crucial role in ensuring optimal vehicle performance. Among these components, cam phasers often go unnoticed, yet they are pivotal for engine efficiency and power delivery. In this blog post, we’ll delve into what cam phasers are, their functions in an automotive context, symptoms indicating they need replacement, and how Hillside Auto Repair can assist you with our comprehensive warranty. What Are Cam Phasers? Cam phasers are advanced engine components primarily used in variable valve timing (VVT) systems. They adjust the timing of the camshaft, which in turn regulates when the engine's intake and exhaust valves open and close. This adjustment is crucial for optimizing engine performance across various RPM ranges, improving fuel efficiency, and reducing emissions. In essence, cam phasers allow for real-time adjustments to the valve timing based on driving conditions. This adaptability means y ... read more