This service and repair manual provides comprehensive information for the Volvo B23 engine family. The B23 is an inline-4 gasoline engine with a displacement of 2.3 liters, known for its robust construction and reliable performance across various applications. Specific engine variants may feature different fuel injection systems, electronic ignition, and emission control technologies, contributing to its versatility. This manual covers details relevant to maintaining and repairing these engines, ensuring their continued operational efficiency. The purpose of this manual is to serve as an authoritative resource for owners, technicians, and mechanics. It details essential maintenance procedures, including recommended intervals for oil changes, spark plug replacement, and timing belt service, along with specifications for fluids and capacities. Furthermore, it offers guidance on troubleshooting common issues and provides technical specifications crucial for accurate diagnosis and repair. By following the instructions and information contained within, users can effectively maintain the longevity and performance of their Volvo B23 engines.