All the brakes on this vehicle rely on Iso Style Tubing Flares at every chassis brake tube location except the rear proportioning valve which connects to the flex hose with a Sae double inverted flare. When changing your chassis brake tubes, only 4.75 mm (3/16 inch) double wall steel tubing should be used. A zinc and aluminum alloy (Prokote 2000) coats the brake pipes in the chassis, so the replacement must also use a coated tube. Only use the right type of flaring tool and process when attaching brake tubes to ensure your car's hydraulic brakes are safe. Before you flare and cut the end of the brake line tubing, first use your Tubing Cutter, Special Tool C-3478-A or similar, to remove the old seat on the tubing. Work out any burrs on the inside of the tubing for a clean square end that fits well with the flared part of the flared nut. Remember to attach a tube nut to the tubing before you begin to flare. While conducting service work, be sure to fit metric Iso tube flaring equipment to 4.75 mm tubing. To create an (Iso tube) flare, use the Snap-On Flaring Tool Tfm-428 or a similar product. At the tubing's end, ensure it is squared and has no burrs to improve the final surface. Use the Flaring Tool's jaws to surround the tubing, close them together, but do not lock the tubing. Ensure that the interior of the tubing is right against the top of the flaring tool bar assembly. Put the proper size adaptor on the yoke's feed screw, so that it fits in the middle of the brake tubing. Work lubricant onto the portion of the adapter that touches the brake tubing and push the adapter all the way inside the brake tubing. Adjust the screw on the yoke assembly so that the adaptor is sitting level on the bar assembly, ending in the creation of an Iso tubing flare.