OTC (7928) Ford Valve Spring Compressor Tool Handy tool that compresses valve springs for quicker, easier camshaft, valve seal, valve spring, or retainer service You don't have to remove the head from the engine first OEM-approved tool Used with a 3/8 inch ratchet or breaker bar Works on 1991-2004 Ford vehicles with 4.6L, two-valve, V8 engines; 4.6 4V, 5.4 V8 and 6.8 V10