Manifold & exhaust systems (Inlet manifold): Description and operation

INLET MANIFOLD

The inlet manifold is a fabricated aluminium alloy manifold, secured by 4 bolts and 2 nuts and incorporates a twin terminal sensor, at the timing belt end, to measure the temperature of the boosted air supply to the combustion chambers. The gasket is a multi-leaf type and also seals the exhaust manifold to the cylinder head.

EXHAUST MANIFOLD

The cast iron manifold, secured by 6 bolts and 4 nuts, carries an EGR valve and a variable wastegate Garrett turbocharger with a maximum boost pressure of 1.2 bars.

NOTE: Gaskets are NOT fitted to the manifold to turbocharger joint or on the turbocharger to exhaust outlet pipe joint.

EXHAUST SYSTEM

All the silencers contain a series of expansion chambers, resonators and baffles designed to give an improved exhaust system, eliminate condensation and give a longer life to the system.

The exhaust system consists of a single front pipe which terminates at a catalytic coverter, an intermediate pipe which incorporates a silencer and tailpipe which incorporates a second silencer.