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A redesigned cylinder head and manifold for improved air flow. Variable exhaust valve timing (the LW2 engine only had variable intake valve timing) Specially-developed fuel injectors. New pistons with pentroof-style centre-domes and valve eyelets for a higher compression ratio of 12.2:1 (compared to 10.2:1 for the dual fuel engine).
The two-valve arrangement is retained, though the titanium intake valves by Del West have grown to 2.2 in (56 mm) and sodium-filled exhaust valves are up to 1.61 in (41 mm). Peak output is 505 bhp (512 PS; 377 kW) at 6300 rpm (72.0 BHP/L) and 470 lb⋅ft (637 N⋅m) of torque at 4800 rpm with a 7000 rpm redline. [68]
The LE9 5.0 L (305 cu in) was a version of the 305 with a four-barrel 650 cu ft/min (18 m 3 /min) carburetor and equipped with electronic spark control (ESC), [34] a 9.2-9.5:1 compression ratio, the LM1 cam and 14010201 casting heads featuring 1.84/1.50" valves, and 53 cc (3.2 cu in) chambers. The engine produced 165 hp (123 kW) at 4,400 and ...
A solenoid control valve assembly integrated into the engine valley cover contains solenoid valves that provide a pressurized oil signal to specially designed hydraulic roller lifters provided by Eaton Corp. and Delphi. These lifters disable and re-enable exhaust and intake valve operation to deactivate and reactivate engine cylinders . Unlike ...
A typical oil change used 7.5–8 US qt (7.1–7.6 L; 6.2–6.7 imp qt) of oil. GM specified cast-iron cylinder liners and the cast aluminum pistons included valve clearance. Northstar is an interference engine: the valves will strike the pistons if they lose timing. It has bronze piston pin bushings and free-floating piston pins.
Starting with the 2002 model year, power was increased to 405 hp (411 PS; 302 kW) at 6,000 rpm and 400 lb⋅ft (542 N⋅m) of torque at 4,800 rpm, due to a larger air intake, stiffer valve springs, lighter sodium filled valves, more aggressive camshaft lift and timing, and a less restricted exhaust that eschewed the use of pre-catalytic converters.
The 6.2 L (379 cu in) V8 is the main variant of the Boss engine. The V8 shares design similarities with the Modular Engine family such as a deep-skirt block with cross-bolted main caps, crankshaft-driven gerotor oil pump, overhead cam valve train arrangement, and bellhousing bolt pattern.
The Avalanche included features such as 16-inch alloy wheels and tires (chromed steel on the 2500 model), an AM/FM stereo with single-disc CD player and six speakers, cloth seating surfaces, front bench seat with power front driver's seat, power windows, power door locks, keyless entry, full instrumentation, dual front airbags, and air ...