Exhaust Heat Control Valve: Description

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Vacuum operated exhaust heat control valves are used on 2800 cc engines. Unit consists of a housing and butterfly valve controlled by a vacuum motor. Exhaust heat control valve is installed between exhaust pipe and exhaust manifold. The system also incorporates a Ported Vacuum Switch (PVS) and an intake manifold vacuum tap to control when and how long exhaust heat control valve operates.