Power Heat Control Valve

This valve is vacuum actuated and is located between the right exhaust manifold and exhaust pipe, where it directs the majority of exhausts of exhaust gases through the left hand exhaust manifold.
The CCEVS or CVSCO controls the manifold vacuum signal necessary to activate the heat valve. At coolant temperatures below a predetermined level, manifold vacuum is applied to the heat valve and all exhaust gas flow is directed to the left hand exhaust manifold. Above this temperature, no vacuum signal is applied to the heat valve and exhaust gases flow through both left and right hand manifolds.