This manual covers the FJ20 engine series, a significant advancement in automotive engineering for its time. Produced approximately from 1981 to 1989, the FJ20 engine family, including variants like FJ20E, FJ20ET, FJ20DET, and FJ20T, represented the first mass-produced DOHC 4-valve per cylinder engine. This robust inline 4-cylinder powerplant, with a displacement of 1998 cc, powered iconic models such as the Silvia (S110/S12) and Gazelle, and even saw success in motorsport, notably in the 240RS rally car. Its design offered strong performance potential, with naturally aspirated versions (FJ20E) producing around 145-150 PS and turbocharged variants (FJ20ET/DET) delivering approximately 190-205 PS, making it a favorite among performance enthusiasts and tuners.

This comprehensive Workshop Service Repair Manual in English provides in-depth information essential for the maintenance, diagnosis, troubleshooting, and repair of the FJ20 engine series. It covers all major engine systems, including mechanical components, fuel, ignition, lubrication, cooling, and exhaust systems, as well as turbocharging and intercooling for relevant variants. The manual details scheduled maintenance, component replacement procedures, repair and overhaul instructions with specifications, and recalibration adjustments. It serves as an invaluable resource for owners, mechanics, and technicians seeking to preserve the performance and longevity of these classic engines, offering guidance from basic upkeep to full engine rebuilds.