Proform's new Pneumatic Valve Spring Compressor can cut cylinder head disassembly time in half. Pulling the tool's trigger supplies up to 350 pounds of force using 125-psi air-compressor pressure ...

Airborne Flying Services of Hot Springs, Ark., developed and now offers the Valve Wizard, a set of three valve spring compressor tools for Lycoming O-235, O-290, IO/O-320, IO/O-360, AEIO-360, O ...

Next, position the valve spring compressor and compress the spring and retainer assembly until the keepers can be removed. A magnet or an awl often simplifies keeper removal, but use care not to ...

This isn't difficult if you have the correct tools. Several companies offer an on-head spring compressor; we chose the TFS tool, but Comp Cams and Crane offer similar versions.