MANIFOLDS AND EXHAUST SYSTEM – TD6 DESCRIPTION AND OPERATION 30-1-9 Inlet Manifold The inlet manifold is a one piece plastic moulding with inlet tracts feeding intake air into the cylinder head ports directly in the cylinder head via the camshaft cover. The manifold is secured to the cylinder using seven studs. All incorporate sealing washers and compression limiters. The manifold is secured to the camshaft cover with twelve bolts incorporating compression limiters. Sealing between the manifold, cylinder head, and camshaft cover is achieved using moulded rubber seals located in recesses in the manifold. A boost pressure sensor is located on the rear of the inlet manifold. The sensor is secured to the manifold with a bolt and sealed with an 'O' ring. On the front of the inlet manifold, four threaded holes provide for the attachment of the EGR valve. The valve is sealed to the manifold with an 'O' ring.