1.400-1.800 Valve Spring Height Micrometer

The PROFORM 1.400–1.800 Valve Spring Height Micrometer (SKU PFM66903) is a precision measuring instrument engineered for engine builders, mechanics, and performance technicians who demand accuracy in valve train assembly. This specialized gauge exists to verify valve spring installed height—a critical dimension that directly affects valve timing, engine compression, and overall reliability. Whether you're rebuilding a stock engine, tuning a race motor, or performing quality control on high-performance builds, this micrometer eliminates guesswork and ensures your valve springs meet OEM or custom specifications.

Built to PROFORM's exacting standards, the 1.400–1.800 Valve Spring Height Micrometer features a 0.001-inch scale resolution, delivering the precision required for professional engine assembly work. The instrument's compact design—measuring 4.6 × 1.8 × 7 inches and weighing just 0.17 lbs—makes it easy to maneuver in tight engine compartments and valve cover areas during installation verification. The graduated scale allows technicians to confirm that valve springs are compressed to the exact height specified by the engine manufacturer, preventing common failures caused by springs that are too loose or incorrectly preloaded.

This micrometer is indispensable for anyone performing top-end engine work, including cylinder head gasket replacement, valve job completion, or performance upgrade installation. Professionals in machine shops, automotive repair facilities, and motorsports operations rely on this tool to validate spring height before final assembly—a step that prevents expensive comebacks and catastrophic engine damage. The 1.400–1.800-inch range covers the majority of domestic and import passenger vehicle engines, making it a practical addition to any serious builder's toolkit or shop inventory.