THERMACTOR II Pulse Air System: Description

This system is used on some Federal models equipped with the 200" 6-cylinder engine and automatic transmission. This system differs from the standard Thermactor I system in that it does not use an air pump. In operation, the system uses exhaust "pulses" to pull fresh air into the exhaust manifold.

An air inlet valve and a flame arrestor are connected to the exhaust manifold and air cleaner with hoses. The air inlet valve resembles a conventional check valve, but the two are not interchangeable.