Air Guard System: Description

NOTE: For information on 1975-77 American Motors Corp. vehicles with Air Injection, see Air Injection Systems - Exc. Ford With Cat. Converter article in this section.

The Air Guard System is used to reduce carbon monoxide and hydrocarbon emissions. The system adds a controlled amount of air to exhaust gases in the exhaust ports, causing oxidation of the gases. The system consists of a belt driven air pump, diverter (by-pass) valve, air injection manifold(s), check valve, and connecting hoses. In addition, California 6-cylinder engines are also equipped with a vacuum delay valve.