1985-91 Ford Open-Bowl TFI Distributor Exploded Diagram - Rotor & Cap Details

This document is an exploded parts diagram of the '85-91 open-bowl style Ford distributor, showing the disassembled components and their names: shaft assembly, stator assembly, screws, octane rod, grommet, base, pin, O-ring, TFI-IV module, and drive gear. A second panel illustrates the distributor rotor, labeling the spring, blade, and locating boss, with service notes stating that the complete surface top, bottom, and edges of the rotor blade tip should be coated with silicone compound 1/32" thick, and that no compound should be applied to the spring contact surface. A third panel shows the inside of the distributor cap, identifying the square alignment locator, carbon button, and areas to inspect for cracks or carbon tracking. A reader can learn the internal parts layout of the open-bowl TFI-IV distributor for reassembly or parts identification, the proper silicone dielectric compound application on the rotor blade, and what to inspect on the cap (cracks/carbon tracks) during ignition service. The diagram applies to 1985–1991 vehicles per its own title and is relevant to the uploader's 1990 Ford Bronco.