Service valve springs with the cylinder head in place
The 66784 stud-mount valve spring compressor threads onto a compatible rocker arm stud. Its lever compresses the spring to expose the valve keepers for inspection or replacement.
Check fit before ordering
Designed for compatible 3/8″ and 7/16″ rocker arm studs. Confirm the stud thread, retainer fit and clearance around the valve spring on your engine before ordering.
Tool features
- 360° rotating handle lets you position the lever for access around the cylinder head.
- Stud-mounted fork applies leverage directly to the spring retainer.
- Zinc-coated steel resists corrosion, and the rubber grip helps you maintain control.
In the box
One 66784 stud-mount valve spring compressor.
Service note
Follow your engine’s service procedure for supporting the valve before removing the keepers. Wear eye protection and release spring pressure slowly.