CE WH PHG 250 0808 Copyright 2008 by Wurth 05 0193 Spark Plug Repair Stage 1 Start stepped tap into the hole to be re paired Use the wrench and tap new threads Continue to tap through until the cutting edges are approximately 14 6 mm below surface Stage 2 Leave the stepped tap in the hole and place the seat cutter over the shank Using the wrench rotate the seat cutter after a few turns lift the seat cutter to inspect the seat Repeat operation until the seat is complete ly cleaned up Back the stepped tap from the hole thus removing any burrs from the tapped thread Stage 3 Lubricating the insert tool with Art No 893050004 Wurth Cutting Oil start insert into the hole Use the wrench and rotate the inserting tool through the insert When the insert is seated the inserting tool will tighten up with increased pressure continue to ro tate the inserting tool until it loosens up Remove the inserting tool Stage 4 Repair is complete Solid steel threads are square to the reconditioned seat ensuring a good spark plug seal preventing any gas leakage TIMESER T