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5 - Bolt (2 of) 6 - Variable tract valve The intake manifold attaches to the cylinder head with 6 bolts and the oil pan with 2 bolts. The manifold is capable of varying both intake tract length and plenum volume by means of 2 separate valves. At low engine speeds, long intake tracts are utilized to provide optimum engine torque. Shorter tracts are used at medium speeds, At higher engine speeds the benefits of optimizing the tract lengths are outweighed by the necessity of maintaining an Intake Air Distribution and Filtering (303-12A Intake Air Distribution and Filtering - I6 3.2L Petrol, Description and Operation). Exhaust Manifold Item Part Number Description 1 - Exhaust manifold assembly 2 - Gasket 3 - Exhaust manifold - cylinders 1 to 3 4 - Exhaust manifold - cylinders 4 to 6 The exhaust manifold comprises 2 separate manifold assemblies. One manifold is used for cylinders 1 to 3 and the second Each manifold comprises 3 fabricated branches, which merge into an integral catalytic converter. A threaded boss is positioned A bracket on each outlet flange allows for the attachment of an exhaust manifold heat shield. CRANKSHAFT, BEDPLATE AND OIL PAN COMPONENTS The crankshaft and oil pan components are: Crankshaft and main bearings Crankshaft and Main Bearings |