Valve spring compressor tools are used to secure valve springs and compress them so they can be removed, repaired or replaced. They also make it easier to perform work on other parts of the valves and cylinders of engines and rebuild them.
Valve spring compressor tools also reduce the amount of time and labor required to repair or replace valve springs by making it possible for one mechanic to perform the job. They also make it possible to repair or install valve springs without removing the cylinder heads of the engine, which reduces the amount of time and labor required to perform this type of work.
Valve springs secure valves and keep them retracted to allow the pistons of an engine to extend fully. The extreme heat and tension under which they operate makes them prone to damage. This causes the valve to interfere with the operation of the piston, which causes engine damage and failure.