Ford 5.0L Thermactor Air Pump, Bypass Valve & Silencer Diagram - 1990 Bronco

This document is a factory-style line drawing (schematic) showing the front view of a Ford V8 engine's Thermactor secondary air injection (emissions) system components. The illustration is labeled 'FRONT VIEW' with an arrow indicating 'FRONT OF ENGINE.' Four callouts identify key components: the SILENCER/FILTER mounted on the left side of the engine front, the AIR BYPASS VALVE located low near the center-front of the engine with associated hose routing, and the belt-driven AIR PUMP with its pulley at the lower right of the accessory drive. The drawing also depicts the alternator, valve cover, EGR-type valve at the top, and the air hose plumbing connecting the pump, bypass valve, and silencer/filter, though these are not labeled. A drawing reference number 'A12775-A' appears at the lower right. A reader can learn where the secondary air pump, air bypass valve, and silencer/filter are physically located on the front of the engine and how the air hoses route between them, which is useful for identifying, diagnosing, or replacing Thermactor/smog pump emissions components. The document itself carries no year, model, or engine displacement text; the uploader attributes it to a 1990 Ford Bronco 5.0L.