If the cylinder heads are on the engine, you will need to add air pressure to the cylinder to hold the valves in place. Our example is the Craftsman 47089 compression test kit using the 14mm long ...

Choosing the right valve spring for your engine is essential to ensuring optimal performance, reliability, and longevity. Valve springs are often overlooked, but they play a crucial role in ...

Jolly Time Tools Inc. offers a series of valve spring compressor tools for Lycoming and Continental parallel- and angle-valve engines. The tools allow mechanics the use of both hands to remove and ...

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-435, ...

Aldan American tests the Branick 7600. We recently discovered that AutoZonePro sells tools. Not the cheap disposable kind but the worthy keep-forever kind. The trick is to thumb-scroll the Tool & ...