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Also, a continuously variable oil pump helps to lower parasitic losses as well as providing proper lubrication and cooling to the engine, especially under high-load conditions. [1] The Active Fuel Management system can shutdown the middle two cylinders under low-power conditions. [2] Cylinder liners are spun nodular iron. [2]
6.2L fitted to a 1987 HMMWV. The original 6.2 L (379 cu in) diesel V8 was introduced in 1982 for the Chevrolet C/K and was produced until 1993. The 6.2L diesel emerged as a high-fuel-economy alternative to the V8 gasoline engine lineup, and achieved better mileage than Chevrolet's 4.3L V6 gasoline engine of the 1980s, at a time when the market was focused on power rather than efficiency.
Many owners tried to solve this by adding anhydrous alcohol, a common trick to deal with water in fuel, but this instead dissolved fuel pump seals and other parts. The stretchy fuel-pump timing chain was a minor problem in light of the other issues. Poor dealer service training only made all the problems worse. [8]
The engine gained new 29,000 PSI piezo injectors as well as a completely reworked fuel system which was now powered by the Bosch CP4 pump, that also now supports up to 20% biodiesel mixtures and a urea injection (to reduce nitrogen oxides) with a 5.3 gallon DEF tank. This engine has a fuel injector in the exhaust tract, to allow raw fuel ...
The vast majority of vehicles manufactured after 1987 are fuel-injected: the injectors and high-pressure fuel pump immediately cease supplying fuel to the cylinders when the ignition is switched off. If the injector is damaged or dirty, a small amount of fuel can enter the chamber and be ignited, causing a sputter or two after the engine is ...
5.3L V8 Chevrolet Silverado; 5.3L V8 Chevrolet Tahoe; 5.3L V8 Chevrolet Suburban; 5.3L V8 Chevrolet Avalanche; 3.5L V6 Chevrolet Impala; 5.3L V8 Chevrolet Express; 3.9L V6 Chevrolet Uplander; 2007. Impala; 5.3L Chevrolet Silverado; 4.6L Ford Crown Victoria (2-valve, excluding taxi and police units) 5.4L Ford F-150 (3-valve) 5.3L GMC Sierra (LMG V8)
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Active Fuel Management (formerly known as displacement on demand (DoD)) is a trademarked name for the automobile variable displacement technology from General Motors. It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy .
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