The Ford Sierra RS Cosworth 1986-1992 Factory Service Repair Manual is your comprehensive guide to maintaining and repairing this iconic vehicle. This official manual is the same one used by Ford-trained technicians, providing you with detailed insights into all aspects of your Cosworth. From routine maintenance to complex repairs, this manual covers everything you need. Learn the fundamentals of general maintenance, troubleshoot issues with precision, and perform engine, transmission, brake, and electrical system service and repairs with confidence. The manual includes detailed wiring diagrams and a comprehensive troubleshooting guide to help you diagnose and correct any problem. Dive into specific areas like suspension, steering, cooling, and fuel systems with step-by-step instructions, detailed illustrations, and clear diagrams. Learn about the engine control system, chassis and body, restraint systems, interior components, and differentials. This manual offers a wealth of information, including periodic lubrication procedures, heater and air conditioner maintenance, and emission system care, ensuring your Cosworth runs smoothly and efficiently. This manual is a valuable resource for any serious owner, offering a wealth of indispensable information to enhance your understanding of your Ford Sierra RS Cosworth.

The Ford Sierra RS Cosworth, produced from 1986 to 1992, is a high-performance variant of the Ford Sierra, a car that defied its mundane origins to become a legend in the world of motorsport and performance driving. It emerged as a culmination of Ford's collaboration with the renowned motorsport engineering firm, Cosworth, aiming to dominate Group A rallying. The RS Cosworth's defining feature was its potent 2.0-liter turbocharged four-cylinder engine, meticulously crafted by Cosworth, delivering an impressive 204 horsepower in its initial iteration. This powerplant, paired with a robust five-speed manual gearbox, propelled the Cosworth to a blistering top speed of 148 mph, making it a formidable competitor on both the road and the racetrack. The RS Cosworth's performance was further enhanced by its distinctive aerodynamic bodywork, featuring a prominent rear spoiler and a sculpted front bumper, all meticulously engineered to improve downforce and stability at high speeds. The Cosworth's design was a testament to the era's fascination with sharp angles and an aggressive aesthetic, making it a standout even today. Beyond its racing pedigree, the Ford Sierra RS Cosworth's impact extended far beyond the confines of motorsport. Its potent performance and captivating design garnered a passionate following among car enthusiasts, solidifying its status as a cult classic. The Cosworth's allure transcended its original production run, with its legacy continuing to resonate in the world of car collecting and restoration. Today, the RS Cosworth is a highly sought-after collectible, its value appreciating steadily over time. The Factory Repair Manual, a comprehensive guide to maintaining and repairing this iconic vehicle, stands as a testament to its enduring appeal. This manual empowers owners and enthusiasts to delve deeper into the intricacies of the RS Cosworth, ensuring that its legacy of performance and desirability continues to thrive for generations to come.