Intake Manifold: Description and Operation

Intake Manifold





Filtered air from the vehicle's intake ducting is metered by the throttle body and distributed to the two cylinder banks via an integral intake manifold.

The intake manifold is manufactured in plastic with integral plastic fuel rails and metal-thread inserts; the very smooth internal surfaces give excellent air flow.

Individual ducts lead off a central chamber to the inlet valves of each cylinder.

Silicon-rubber gaskets, located in channels in the intake manifold, seal the joints between the ducts and the cylinder heads.

Engine Ventilation

The engine is ventilated through two breathers, a part-load breather and a full-load breather, one on each camshaft cover. The outlet hose for the part-load breather is connected between the bank 2 camshaft cover and the intake elbow. The full-load outlet hose is connected from the bank 1 camshaft cover to the intake duct between the MAF sensor assembly and the throttle body.

Constructed in plastic, the hoses incorporate O-ring seals and quick-release connectors.

Intake Manifold (Normally Aspirated)





The intake manifold is manufactured in plastic with integrated plastic fuel rails and metal thread inserts; the very smooth internal surfaces give excellent air flow.

Individual ducts lead off a central chamber to the inlet valves of each cylinder.

Silicon rubber gaskets, located in channels in the intake manifold, seal the joints between the ducts and the cylinder heads.