The Atlas engines feature aluminum cylinder blocks and heads, with the cylinder bores featuring replaceable steel cylinder liners.[1]
The Atlas program began in 1995 along with the planning for GM's next-generation mid-size SUVs and pickup trucks. These vehicles were designed around the I6 engine. The I6 version was used in a Baja 1000 racing truck, winning its first race in a class that also included V8 engines. Another I6-powered truck won the truck class at the Pikes Peak International Hillclimb.
It displaces 4.2 L; 253.9 cu in (4,160 cc), with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. It has four valves per cylinder, utilizes dual-overhead cams (DOHC) design, and features variable valve timing on the exhaust cam, a first for GM inline engines. When introduced, this engine's power was 270 hp (201 kW) at 6,000 rpm and torque was 275 lb⋅ft (373 N⋅m) at 3,600 rpm. 2003 saw a slight bump in power to 275 hp (205 kW), while torque was unchanged. For 2006, power was increased to 291 hp (217 kW) at 6,000 rpm and torque to 277 lb⋅ft (376 N⋅m)) at 4800 rpm with the addition of a MAF and a complete internal redesign of the engine; however, due to the new SAE rating procedures, ratings can vary slightly between years. The engine redline is 6,300 rpm. The LL8 was on the Ward's 10 Best Engines list for 2002 through 2005 and was the basis for all the other Atlas engines. With the closure of the Moraine, Ohio, plant and the discontinuation of the GMT360 platform (Chevrolet TrailBlazer, GMC Envoy, etc.), production of the LL8 also ended.[3]
The L52 (also called Vortec 3500), is a straight-5DOHC engine produced from 2004 through 2006. It displaces 3.5 L; 211.1 cu in (3,460 cc), with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. Dynoed at the flywheel it produces 220 hp (164 kW) at 5,600 rpm and 225 lb⋅ft (305 N⋅m) at 2,800 rpm. The engine redline is 6,300 rpm.[4]
The LLR (also called Vortec 3700), is a straight-5DOHC engine with dual balance shafts produced from 2007 through 2012. It displaces 3.7 L; 222.9 cu in (3,653 cc), courtesy of a larger 95.5 mm (3.76 in) bore while keeping the 102 mm (4.02 in) stroke. The LLR also corrected the head issue found in the L52. It produces 242 hp (180 kW) at 5,600 rpm and 242 lb⋅ft (328 N⋅m) at 4,600 rpm. The engine redline is 6,300 rpm.[3] This five-cylinder engine achieves better fuel economy and performance than the six-cylinder, but with more power and torque than the four-cylinder.[1]
The LK5 (also called the Vortec 2800) is a 2.8 L; 169.0 cu in (2,770 cc) straight-4DOHC engine produced between 2004 and 2006, with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. It produces 175 hp (130 kW) at 5,600 rpm and 185 lb⋅ft (251 N⋅m) of torque at 2,800 rpm. The engine redline is 6,300 rpm.[5]
The LLV (also called Vortec 2900) is a 2.9 L; 178.3 cu in (2,921 cc) straight-4DOHC engine produced between 2007 and 2012, with a 95.5 mm × 102 mm (3.76 in × 4.02 in) bore and a stroke. It replaced the LK5 and produced 185 hp (138 kW) at 5,600 rpm and 190 lb⋅ft (258 N⋅m) of torque at 2,800 rpm. The engine redline is 6,300 rpm.[6]
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January 23, 2023
general, motors, atlas, engine, atlas, name, family, modern, inline, piston, engines, trucks, from, general, motors, used, gmt355, gmt360, platforms, series, debuted, 2002, with, oldsmobile, bravada, also, used, buick, rainier, chevrolet, trailblazer, colorado. Atlas is a name for a family of modern inline piston engines for trucks from General Motors used in the GMT355 and GMT360 platforms The series debuted in 2002 with the Oldsmobile Bravada and is also used in the Buick Rainier the Chevrolet TrailBlazer and Colorado the GMC Envoy and Canyon the Hummer H3 Isuzu Ascender and i 370 and the Saab 9 7X The engines use GM s Vortec name and Straight 4 Straight 5 and Straight 6 engines are all part of the same family sharing the same manufacturing equipment rods pistons valves and other parts They feature coil on plug ignition systems 1 variable valve timing on the exhaust side electronic throttle control and a special oil pan with a pass through for the half shafts in four wheel drive vehicles The inclusion of VVT on the exhaust camshaft side allows the Atlas series to meet emissions standards without the use of EGR simplifying the engine design and increasing power for a broad power curve The LL8 shares 75 of its components with the LK5 and L52 while the LK5 and L52 share 89 of their components 2 General Motors AtlasOverviewManufacturerGeneral Motors CorporationAlso calledVortecProduction2002 2012LayoutConfigurationStraight 4 Straight 5 and Straight 6Displacement2 8 L 169 0 cu in 2 770 cc 2 9 L 178 3 cu in 2 921 cc 3 5 L 211 1 cu in 3 460 cc 3 7 L 222 9 cu in 3 653 cc 4 2 L 253 9 cu in 4 160 cc Cylinder bore93 mm 3 66 in 95 5 mm 3 76 in Piston stroke102 mm 4 02 in Block materialAluminumHead materialAluminumValvetrainDOHC 4 valves x cyl with VVTCompression ratio10 0 1RPM rangeRedline6 300 RPMCombustionFuel systemMulti point fuel injectionFuel typeGasolineOil systemWet sumpCooling systemWater cooledOutputPower output175 291 hp 130 217 kW Torque output185 277 lb ft 251 376 N m ChronologyPredecessorChevrolet Turbo Thrift engineGeneral Motors 122 engineThe Atlas engines feature aluminum cylinder blocks and heads with the cylinder bores featuring replaceable steel cylinder liners 1 The Atlas program began in 1995 along with the planning for GM s next generation mid size SUVs and pickup trucks These vehicles were designed around the I6 engine The I6 version was used in a Baja 1000 racing truck winning its first race in a class that also included V8 engines Another I6 powered truck won the truck class at the Pikes Peak International Hillclimb The Atlas engines were produced at the Flint Engine South plant in Flint Michigan while the I4 and I5 versions were produced at the Tonawanda Engine plant in Tonawanda New York near Buffalo Contents 1 LL8 Vortec 4200 2 L52 Vortec 3500 3 LLR Vortec 3700 4 LK5 Vortec 2800 5 LLV Vortec 2900 6 References 7 External linksLL8 Vortec 4200 Edit 2006 LL8 Vortec 4200 engine in 2006 Chevrolet TrailBlazer The LL8 or Vortec 4200 is a straight 6 gasoline engine produced from 2002 to 2009 It was the first Atlas engine and was introduced in 2002 for the Chevrolet TrailBlazer GMC Envoy and Oldsmobile Bravada The engine was also used in the Buick Rainier Saab 9 7X and Isuzu Ascender It displaces 4 2 L 253 9 cu in 4 160 cc with a 93 mm 102 mm 3 66 in 4 02 in bore and stroke It has four valves per cylinder utilizes dual overhead cams DOHC design and features variable valve timing on the exhaust cam a first for GM inline engines When introduced this engine s power was 270 hp 201 kW at 6 000 rpm and torque was 275 lb ft 373 N m at 3 600 rpm 2003 saw a slight bump in power to 275 hp 205 kW while torque was unchanged For 2006 power was increased to 291 hp 217 kW at 6 000 rpm and torque to 277 lb ft 376 N m at 4800 rpm with the addition of a MAF and a complete internal redesign of the engine however due to the new SAE rating procedures ratings can vary slightly between years The engine redline is 6 300 rpm The LL8 was on the Ward s 10 Best Engines list for 2002 through 2005 and was the basis for all the other Atlas engines With the closure of the Moraine Ohio plant and the discontinuation of the GMT360 platform Chevrolet TrailBlazer GMC Envoy etc production of the LL8 also ended 3 Applications 2002 2009 GMC Envoy Envoy XL and Envoy XUV 2002 2009 Chevrolet TrailBlazer and TrailBlazer EXT 2002 2004 Oldsmobile Bravada 2004 2007 Buick Rainier 2003 2008 Isuzu Ascender 2005 2009 Saab 9 7X 4 2iL52 Vortec 3500 Edit GMC Canyon Vortec 3500 engine The L52 also called Vortec 3500 is a straight 5 DOHC engine produced from 2004 through 2006 It displaces 3 5 L 211 1 cu in 3 460 cc with a 93 mm 102 mm 3 66 in 4 02 in bore and stroke Dynoed at the flywheel it produces 220 hp 164 kW at 5 600 rpm and 225 lb ft 305 N m at 2 800 rpm The engine redline is 6 300 rpm 4 Applications 2002 Bel Air concept 2004 2006 Chevrolet Colorado and GMC Canyon 2006 Isuzu i 350 2006 Hummer H3LLR Vortec 3700 EditThe LLR also called Vortec 3700 is a straight 5 DOHC engine with dual balance shafts produced from 2007 through 2012 It displaces 3 7 L 222 9 cu in 3 653 cc courtesy of a larger 95 5 mm 3 76 in bore while keeping the 102 mm 4 02 in stroke The LLR also corrected the head issue found in the L52 It produces 242 hp 180 kW at 5 600 rpm and 242 lb ft 328 N m at 4 600 rpm The engine redline is 6 300 rpm 3 This five cylinder engine achieves better fuel economy and performance than the six cylinder but with more power and torque than the four cylinder 1 Applications 2007 2012 Chevrolet Colorado and GMC Canyon 2007 2010 Hummer H3 2007 2008 Isuzu i 370LK5 Vortec 2800 EditThe LK5 also called the Vortec 2800 is a 2 8 L 169 0 cu in 2 770 cc straight 4 DOHC engine produced between 2004 and 2006 with a 93 mm 102 mm 3 66 in 4 02 in bore and stroke It produces 175 hp 130 kW at 5 600 rpm and 185 lb ft 251 N m of torque at 2 800 rpm The engine redline is 6 300 rpm 5 Applications 2004 2006 Chevrolet Colorado and GMC Canyon 2004 2006 Isuzu i 280LLV Vortec 2900 EditThe LLV also called Vortec 2900 is a 2 9 L 178 3 cu in 2 921 cc straight 4 DOHC engine produced between 2007 and 2012 with a 95 5 mm 102 mm 3 76 in 4 02 in bore and a stroke It replaced the LK5 and produced 185 hp 138 kW at 5 600 rpm and 190 lb ft 258 N m of torque at 2 800 rpm The engine redline is 6 300 rpm 6 Applications 2007 2012 Chevrolet Colorado and GMC Canyon 2007 2009 Isuzu i 290References Edit a b c 5 Cylinder Engine Vortec 3500 Retrieved 2011 10 13 Improved Performance and Efficiency Highlight a Robust Powertrain Lineup for 05 Archived from the original on 2010 01 08 a b 2007 LLR Spec Sheet 2006 Vortec 3500 3 5L I 5 L52 Spec Sheet PDF Archived from the original PDF on 2016 01 09 2006 Vortec 2800 2 8L I 4 LK5 PDF Archived from the original PDF on 2016 01 09 2007 LLV Spec Sheet External links Edit Wikimedia Commons has media related to General Motors Atlas engine Retrieved from https en wikipedia org w index php title General Motors Atlas engine amp oldid 1102342968, wikipedia, wiki, book, books, library,
