Compatibility Fit for Ford 3V engines with 4.6L, 5.4L, and 6.8L displacements. Valve Spring Compressor Tool designed for these engines. Construction Durable materials provide long lasting support and reliability for valve spring work. Function and benefits Properly extracts old valve springs and installs springs, with the ability to valve springs or washers for improved engine function. Designed to deliver dependable compression during removal and installation, helping protect valve components. Practical applications During engine service on Ford 3V V8s (4.6L/5.4L/6.8L) when replacing worn valve springs. In rebuilds or performance upgrades where valve springs or washers need to be replaced. In routine valve train maintenance to maintain or restore engine functionality. Notes This tool is intended to support valve spring replacement on Ford 3V engines and related valve train work for improved engine performance.