GM High Value engine

{{Infobox automobile engine | name = GM High Value engine | image = 2008 Impala 3.5 L engine with cover.jpg | caption = 2008 Chevrolet Impala 3.5L engine | manufacturer = [[General Motors]] | aka = | production = 2004–2011 | predecessor = {{ubl | [[GM 60° V6 engine]]|[[Buick V6 engine]]}} | successor = [[GM High Feature engine]] | configuration = [[Naturally aspirated]] 60° [[V6 engine|V6]] | displacement = {{ubl | {{cvt|3498|cc|L cuin|1|order=flip}} | {{cvt|3510|cc|L cuin|1|order=flip}} | {{cvt|3880|cc|L cuin|1|order=flip}}}} | bore = {{ubl | {{cvt|94|mm|in}} | {{cvt|99|mm|in}}}} | stroke = {{ubl | {{cvt|76|mm|in|2}} | {{cvt|84|mm|in|2}}}} | block = [[Cast iron]] | head = [[Aluminum]] | valvetrain = [[Overhead valve engine|OHV]] with [[Variable valve timing|VVT]] | compression = 9.8:1 | fuelsystem = [[Sequential multi-port fuel injection]] | management = | fueltype = [[Gasoline]], [[E85]] | oilsystem = [[Wet sump]] | coolingsystem = [[Radiator (engine cooling)|Water-cooled]] | power = {{cvt|196|-|242|hp|kW|0}} | specpower = | torque = {{cvt|213|-|242|lbft|Nm|0}} | emissions control = [[Catalytic converter]] | emissions level = [[California emission standards]] | height = | weight = }}

The '''High Value''' engine family from [[General Motors Corporation|General Motors]] is a group of [[cam-in-block]] or [[overhead valve]] [[V6 engine]]s. These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the [[GM 60-Degree V6 engine|60° V6 family]] they are based on, but the new {{cvt|99|mm|in|2}} bore required offsetting the bores by {{cvt|1.5|mm|in}} away from the engine center line. These engines (aside from the LX9) are the first cam-in-block engines to implement [[variable valve timing]], and won the 2006 Breakthrough Award from ''[[Popular Mechanics]]'' for this innovation. For the 2007 [[model year]], the 3900 engine featured optional [[displacement on demand]] or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. It was rumored that GM would produce a 3-valve design, but that never came to be. These engines were produced primarily at the GM factory in [[Tonawanda Engine|Tonawanda, New York]], and at the [[Ramos Arizpe Assembly|Ramos Arizpe engine plant]] in Mexico.<ref>[http://gmauthority.com/blog/gm/gm-manufacturing/ List of GM facilities]</ref> The assembly line for this engine was manufactured by Hirata Corporation at its powertrain facility in [[Kumamoto, Japan]].

As of the 2012 model year, GM no longer sells these engines in any [[United States domestic market|U.S. market]] vehicles.

==3.5== :''These engines should not be confused with the 3.5L [[DOHC]] [[Northstar engine series|LX5 (Shortstar)]] V6 engine.''

===LX9=== The '''LX9 3500''' is an OHV engine based on the [[GM 60-Degree V6 engine#3.4/3400|3400 V6]]. Bore and stroke are {{cvt|94x84|mm|in|2}}, for a displacement of {{cvt|3498|cc|L cuin|1|order=flip}}.

According to a GM press release from October 2002, the 3500 V6 offered improved performance and fuel efficiency, as well as reduced emissions and [[Noise, vibration, and harshness|NVH]] compared to the 3400 V6. The 3500 V6 featured an updated [[powertrain control module]], electronic throttle control, fuel injection system, [[exhaust manifold]], [[catalytic converter]], accessory drive system, and improved cooling and sealing systems.<ref>{{Cite web |date=2002-10-04 |title=GM Introduces New V-6, V-12 Engines, 6-Speed Automatic Transmission |url=https://www.autoserviceworld.com/jobbernews/gm-introduces-new-v-6-v-12-engines-6-speed-automatic-transmission/ }}</ref>

Power output ranges from {{cvt|196|hp|kW|0}} to {{cvt|201|hp|kW|0}} at 5600 rpm , and torque ranges from {{cvt|213|lbft|Nm|0}} to {{cvt|221|lbft|Nm|0}} at 4000 rpm.

Applications: * 2005–2006 [[Buick Terraza]]/[[Chevrolet Uplander]]/[[Pontiac Montana SV6]]/[[Saturn Relay]] * 2004–2006 [[Chevrolet Malibu]]/[[Chevrolet Malibu Maxx]] * 2005–2006 [[Pontiac G6|Pontiac G6 Sedan / Coupe]] * 2006–2007 [[Buick Rendezvous]] * 2006 [[Pontiac G6|Pontiac G6 GT Convertible]]

===LZ4=== [[File:2008 Impala 3.5 L without cover.jpg|thumbnail|right| LZ4 engine without plastic cover]] The '''LZ4 3500''' is an OHV engine that uses a block similar to the 3.9L ''[[GM High Value engine#LZ9|LZ9]]'' V6. It was introduced for the 2006 model year Impala and Monte Carlo.

Bore is the same {{cvt|99|mm|in|2}}, but the stroke is reduced to {{cvt|76|mm|in|2}} for a displacement of {{cvt|3510|cc|L cuin|1|order=flip}}.

It includes continuously variable cam timing (fixed overlap).

Output is {{cvt|211|hp|kW|0}} at 5800 rpm and {{cvt|214|lbft|Nm|0}} at 4000 rpm.

Horsepower rating changed for the 2007 model year to {{cvt|224|hp|kW|0}} at 5800 rpm and {{cvt|220|lbft|Nm|0}} torque at 4000 rpm.

The Chevrolet Malibu, Pontiac G6, and Saturn Aura came equipped with this engine for 2007 (previously, the Malibu and G6 had the non-VVT {{cvt|201|hp|kW|0}} 3.5 L ''[[GM High Value engine#LX9|LX9]]'').

In 2008, the SAE horsepower rating was dropped to {{cvt|219|hp|kW|0}}, keeping torque as is. On Pontiac G6 convertible models, horsepower was rated at {{cvt|217|hp|kW|0}}.

Applications: * 2006–2009 [[Chevrolet Impala]] * 2006–2007 [[Chevrolet Monte Carlo]] * 2008–2010 [[Chevrolet Malibu]] Fleet * 2007 [[Chevrolet Malibu]] Sedan/ Maxx * 2007–2009 [[Saturn Aura]] * 2007–2010 [[Pontiac G6]] * 2008–2010 [[Saturn Vue]] XE AWD LZ4 (Note: Only vehicle to have used the GM METRIC bellhousing for 6T70) Note: GM often refers to this engine in its literature as a "3.5L V6 with Variable Valve Timing."

===LZE=== The '''LZE 3500''' is an OHV [[flexible fuel|flexible-fuel]] engine based on the 3.5L ''[[GM High Value engine#LZ4|LZ4]]'' V6 (it can use either plain gasoline or [[E85]]) and includes continuously [[variable cam timing]] (fixed overlap). Bore and stroke are {{cvt|99x76|mm|in|2}}, for a displacement of {{cvt|3510|cc|L cuin|1|order=flip}}. Output is {{cvt|211|hp|kW|0}} at 5800 rpm and {{cvt|216|lbft|Nm|0}} at 4000 rpm.

Applications: * 2006–2011 [[Chevrolet Impala]] * 2006–2007 [[Chevrolet Monte Carlo]] * 2009–2010 [[Pontiac G6]]

==3.9== Bore and stroke are {{cvt|99x84|mm|in|2}} for a displacement of {{cvt|3880|cc|L cuin|1|order=flip}}.

===LZ9=== The '''LZ9 3900''' has roller rocker arms, a [[variable length intake manifold]], and [[Variable Cam Timing]], a novelty on a pushrod engine. A computer-controlled plenum divider, along with the VVT cam function, improves efficiency across a broader RPM range.

It produces up to {{cvt|240|hp|kW|0}} and {{cvt|240|lbft|Nm|0}} of torque, with a wide [[torque curve]]. At least 90% of the maximum torque output is available from 1500 rpm to 5500 rpm.

Applications: * 2006 [[Pontiac G6|Pontiac G6 GTP Sedan / Coupe / Convertible]] * 2007 [[Pontiac G6|Pontiac G6 GT Sport Package Sedan / Coupe]] * 2007–2009 [[Pontiac G6|Pontiac G6 GT Sport Package Convertible]] * 2006–2007 [[Chevrolet Malibu|Chevrolet Malibu SS]] * 2006 [[Chevrolet Impala]]/[[Chevrolet Monte Carlo|Monte Carlo]] ({{cvt|242|hp|kW|0}}/{{cvt|242|lbft|0}}) * 2006–2009 [[Buick Terraza]]/[[Chevrolet Uplander]]/[[Pontiac Montana SV6]]/[[Saturn Relay]] * 2009–2011 [[Buick Lucerne]] ({{cvt|227|hp|kW|0}} ({{cvt|219|hp|kW|0}} in [[California emission standards|California-emissions]] states))

===LGD===

The '''LGD 3900''' is a [[Flexible-fuel vehicle|flexible-fuel]] version of the LZ9, and like its 3.5L [[GM High Value engine#LZE|LZE]] counterpart, it can run on [[E85]], pure gasoline, or any mixture of the two. This is the last version of the 3900 V6. The LGD was not available with Active Fuel Management. Output is slightly reduced at 230 horsepower at 5700 rpm and 235 lb-ft of torque at 3200 rpm.

Applications:

* 2007–2009 [[Buick Terraza]]/[[Chevrolet Uplander]]/[[Pontiac Montana SV6]] * 2009–2011 [[Buick Lucerne]]/[[Chevrolet Impala]] * 2007 [[Saturn Relay]] ''(fleet only)''<ref>{{cite web |title=2007 Saturn Relay |url=http://archives.media.gm.com/ca/gm/en/products/saturn/archives/2007Relay.html |accessdate=30 September 2013 |publisher=[[General Motors]]}}</ref>

===LZ8 and LZG=== The '''LZ8 3900''' has the same [[Variable Cam Timing]] technology as the LZ9. The 2007 model year introduces the [[Active Fuel Management]] system (formerly known as [[Displacement on Demand]]), which can turn off a bank of cylinders under a light load for increased fuel economy. Output is slightly lower than the LZ9 at {{cvt|233|hp|kW|0}} and {{cvt|240|lbft|Nm|0}}. For 2008, it was replaced by the '''LZG 3900''', a [[Flexible-fuel vehicle|flexible-fuel]] version of the LZ8.

Applications:

* 2007 [[Chevrolet Impala]] (LZ8) * 2008 Chevrolet Impala (LZG)

The LZ8 was replaced by the LGD for 2009.

==References== {{reflist}}

==External links== * [http://media.gm.com/content/media/us/en/news.brand_gm.html/GM/EN/News/PowertrainDetails GM Powertrain website]

[[Category:General Motors engines|High Value]] [[Category:V6 engines]] [[Category:Gasoline engines by model]]