Valve Seal Installation Tools are made from CNC-machined aluminum and are powder coated for protection. They will install PTFE valve seals on valve guide without seal distortion or gouging. Use Crankshaft Seal Installation Tool along with a standard harmonic balancer installation tool (available for rent at most auto parts stores) to install the crank seal in the timing cover of your 7.3L Godzilla engine. This tool works with the factory seal and timing cover (install seal with the timing cover installed on the engine). In addition, the die-cast aluminum tool keeps the seal straight and square during Installation, to eliminate seal damage.