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the cylinder head is a two-rocker shaft, solid type valve system with roller followers. the valves are positioned at a larger angle than previous model years. The intake valves are positioned 23 degrees off-center with the exhaust valves positioned 20 degrees off-center. Prior model year engines utilized a 15-degree positioning angle.
cast aluminium alloy; four valves per cylinder, 16 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, toothed chain-driven double overhead camshaft (DOHC), continuous vane-adjustable variable intake valve timing, Audi variants have two-stage "valvelift" inlet valve lift variable control
The valve size increased as well, to 2.11 in (53.6 mm) intake and 1.77 in (45.0 mm) exhaust valves on high-performance heads. Low-performance and two-barrel applications, the standard engine in full-sized Pontiacs, got 1.96 in (49.8 mm) intake and 1.66 in (42.2 mm) exhaust valves and pressed in rocker arm studs.
Work Completed: Replaced gear linkage, entire exhaust system, carpets, body trim including the wheel arches, side skirts and front and rear bumpers, front indicator and tail light lenses, cam belt, water pump, cold start valve, fan belt, petrol cap, new parcel shelf, new front and rear number plates, reset the height of the rear suspension back ...