- GM 60-Degree V6 engine
Infobox Automobile engine
name=GM 60° V6 engine
manufacturer=General Motors
production=1980–
successor=GM High Value engine
class=60° OHV V6
2.8 L
3.1 L
3.4 L
similar=Ford Vulcan engine Chrysler 3.3 engine The General Motors 60° V6 family of engines began with the 1980Chevrolet 2.8 LV6 and continues to be produced today (if one doesn't count a larger block casting with larger bore center and new cylinder heads). Its use in the X-body cars leads some to refer to it as the X engine.It is a 60° vee block with
pushrod heads, except for a singleDOHC member, the LQ1. This engine family continues with the newGM High Value engine .Generation I
The first generation of GM 60° V6 engines featured an iron block and heads with inline valves. This generation started in 1980 and versions were produced through 1996. Two different blocks were developed:
* Atransverse engine family forfront-wheel drive
* Alongitudinal engine family forrear-wheel drive Transverse
The
transverse engine s began the 60° family in 1980. Like the rest of the Generation I engines, they were updated in 1985 with larger main journals for durability, along withmulti-point fuel injection or E2SE carb andOBD I . Production of the Generation I transverse engines ended in 1986.LE2
The 2.8 L LE2 was the first version of the 60° engine. It was a transverse version produced from 1980 through 1986 for the X-body cars. The standard ("X-code") engine for this line, it used a 2-barrel
carburetor . Output was 115 hp for 1980 and '81 (86 kW), 112 hp for 1982-86 and 135 ft·lbf (183 N·m). Bore was 89 mm and stroke was 76 mm.Applications:
* 1980-1985Buick Skylark
* 1980-1984Oldsmobile Omega
* 1980-1984Pontiac Phoenix
* 1980-1985Chevrolet Citation
* 1982-1986Pontiac 6000
* 1982-1986Chevrolet Celebrity LH7
Introduced in 1981, the 2.8 L LH7 was a High Output ("Z-code") version of the LE2 for the higher-performance X-cars like the Chevrolet Citation X-11. It still used a 2-barrel
carburetor and produced 135 hp (100 kW) and convert|165|ft.lbf|N.m|abbr=on for 1981 and 145 ft·lbf 197 N·m for 1982-1984 versions. The LH7 was replaced after 1984 with theMFI L44.Applications:
* 1982-1984Buick Skylark T-Type
* 1982-1984Oldsmobile Omega SX
* 1982-1984Pontiac Phoenix SJ
* 1981-1984Chevrolet Citation X-11
* 1983-1984 Pontiac 6000 STEL44
The L44 was produced from 1985 to 1988. It used MFI and was a High Output ("9-code") engine for the
Pontiac Fiero . This engine created 110 hp (87 kW ) @ 5000 rpm and 120 ft·lbf (180 Nm) of torque @ 3600 rpm. It also used the same camshaft as the 3.4L V6 that was installed in later Camaros and Firebirds. The heads on this engine also had slightly larger ports as well as larger valves than all other 2.8L engines. These heads were used on the larger 3.4L V6s that came in later Camaros and Firebirds.LB6
The LB6 was produced from 1985 to 1986. It used electronic
fuel injection and was a High Output ("W-code") transverse version. It produced 130 HP and convert|170|ft.lbf|N.m|abbr=on. torque.Applications:
*1985-1986
Chevrolet Cavalier "Z24"
*1985-1986Pontiac 6000
*1985Chevrolet Citation , X-11 and some standard trims
*1985-1986Chevrolet Celebrity
*1986Buick Century
*1985-1986Cadillac Cimarron Longitudinal
The longitudinal versions were quite different from the transverse engines on which they were based. This group appeared in 1982 with the LC1 and LR2 and never added the aluminum heads of the Generation II engines.
Like the rest of the family, larger journals appeared in 1985, along with
MPFI for the F-body LB8 version.Throttle-body injection was added for the truck version in 1986.A 3.1 L version was added in 1990 with an 8 mm longer stroke, and a 3.4 L appeared for 1993 with a 92 mm bore and
SFI . Production of the 2.8 L and 3.1 L (Isuzu ) engines ended in 1994. Production ended for all longitudinal 60° V6s in 1996, though GM's performance parts division continued production of a related crate engine after 1999.LC1
The longitudinal LC1 was produced from 1982 to 1984. It was a 2-barrel High Output ("1-code") version for the F-body cars. Output was 102 hp (76 kW) and 145 ft·lbf (197 N·m). It was replaced by the LB8 for 1985.
Applications:
* 1982-1984Chevrolet Camaro
* 1982-1984Pontiac Firebird LR2
The longitudinal LR2 was a truck version ("B-code") produced from 1982 to 1990. It used a 2-barrel
carburetor and produced 115 hp (86 kW) and 150 ft·lbf (203 N·m).Applications:
* 1982-1986Chevrolet S-10 /Chevrolet S-10 Blazer
* 1982-1986GMC S-15 /GMC S-15 Jimmy
* 1984-1986 Jeep Cherokee
* 1986Jeep Comanche LL1
The longitudinal LL1 was a high-output version of the LC1 produced in 1983 and 1984. It was an optional ("L-code") engine on the Pontiac Firebird with 125 hp (93 kW).
Applications:
* 1983-1984Pontiac Firebird LB8
The LB8 ("S-code") replaced the LC1 in 1985 and was produced until 1989. It used multi-port
fuel injection and was made for longitudinal mounting. Output was 135 hp (101 kW) and 165 ft·lbf (224 N·m).Applications:
* 1985-1990Chevrolet Camaro
* 1985-1989Pontiac Firebird LL2
The carbureted LL2 ("R-code") was produced from 1982 to 1983. Another LL2 ("R-code") with
throttle body fuel injection was produced from 1986 to 1993.Applications:
* 1986-1993Chevrolet S-10 /Chevrolet S-10 Blazer
* 1986-1993GMC S-15 /GMC S-15 Jimmy
* 1989-1991Isuzu Trooper Generation II
The second generation, still 2.8 liters, was introduced in 1987. It used aluminum heads with splayed valves and an aluminum front cover. It was produced exclusively for transverse, front-wheel drive use.
The next year, Chevrolet introduced a full-production long-stroke 3.1 L (3136 cc, 191 CID) version, thanks to an 89 mm bore and 84 mm stroke. It was produced simultaneously with the 2.8L in various compact & midsized vehicles until 1990 when the 2.8L was dropped.
MPFI was added to both, and a full-production turbo version was available on the 3.1L. An even higher displacementDOHC 3.4 L LQ1 was also developed and, eventually, the newGM High Value engine family followed. Production of Generation II engines ended in 1994 after the introduction of the Generation III in 1993.The 2.8 L 60° V6 was used in the following vehicles:
* 1988-1989Buick Regal
* 1987-1989Chevrolet Beretta
* 1987-1989Chevrolet Cavalier Z24
* 1987-1989Chevrolet Corsica
* 1987-1989Pontiac 6000
* 1988-1989Pontiac Grand Prix
* 1987-1989Chevrolet Celebrity
* 1987-1989Oldsmobile Cutlass Ciera
* 1987-1989Buick Century The 3.1 L 60° V6 was used in the following vehicles:
* 1994-1996Buick Century
* 1989-1996Buick Regal
* 1994-1998Buick Skylark
* 1990-1996Chevrolet Beretta
* 1990-1992Chevrolet Camaro
* 1990-1994Chevrolet Cavalier
* 1990Chevrolet Celebrity
* 1990-1996Chevrolet Corsica
* 1990-1995Chevrolet Lumina APV
* 1994-1998Oldsmobile Achieva
* 1990-1997Oldsmobile Cutlass Supreme
* 1994-1996Oldsmobile Cutlass Ciera
* 1990-1995Oldsmobile Silhouette
* 1988-1991Pontiac 6000 STE only for 1988
* 1990-1992Pontiac Firebird
* 1994-1998Pontiac Grand Am
* 1990-2003Pontiac Grand Prix
* 1990-1994Pontiac Sunbird
* 1990-1995Pontiac Trans Sport LG6
The LG6 ("D-code") was produced from 1990 to 1996. It used throttle-body injection and iron heads. It produced 120 hp.
Applications:
*1990-1995Chevrolet Lumina APV
*1990-1995Oldsmobile Silhouette
*1990-1995Pontiac Trans Sport LH0
The LH0 ("T-code") was introduced in 1988 on the Pontiac 6000 STE AWD. It featured a more exotic (for the time) multi-port fuel injection. While not known for its high RPM power, the LH0 has strong low- and mid-range torque. That, combined with its iron intake manifold reliability, gave the 3.1 L engine an excellent reputation. It was produced until 1996 and was exported in some models. This engine produced 140hp and 180lb/ft of torque.
Uses:
*1988-1991Pontiac 6000 STE
*1990Chevrolet Celebrity
*mid 1989-1993Pontiac Grand Prix
*mid 1989-mid 1993Oldsmobile Cutlass Supreme
*mid 1989-1993Buick Regal
*1990-1992Chevrolet Beretta GT
*1990-1994Chevrolet Lumina
*1990-1994Chevrolet Cavalier
*1991-1994Pontiac Sunbird LG5
The LG5 ("V-code") was a special 3.1 L
turbocharged engine produced withMcLaren for just two years, 1989 and 1990. It featured the same multi-port fuel injection intake manifolds and throttle body as the LH0, but cranked out Convert|205|hp|kW|0|abbr=on at 5200 rpm and auto ftlbf|225 of torque at 2100 rpm. Approximately 3,700 engines were produced each year. This engine had a block with more nickel content and hardened internals.This engine is notable, along with other GM turbo engines of the era (such as that found in the Typhoon/Syclone), for the ease with which significant performance gains can be realized with relatively pedestrian modifications.
Applications:
*1989-1990Pontiac Grand Prix "Turbo"
*1990Pontiac Grand Prix STE "Turbo"Generation III
The third generation of the 60° engine was introduced in the 1993
Oldsmobile Cutlass Supreme . It was still an iron block/aluminum head engine, but the head was redesigned for better air flow.From the mid-1990s to 2003, some versions (the plastic intake manifold version) of this engine are involved in intake manifold gasket defects which caused coolant leakage often leading to engine failure. A series of
class action lawsuits, implicating deterioration of thenylon /silicone material of the gasket & the heat warping of the plastic intake manifold upon exposure to Dexcool antifreeze, are pending on this issue. Tell-tale signs of such eventual related damage are a white foam that appears on the inside of the oil filler cap and the gradually increasing loss of antifreeze coolant (due to seepage into the intake passages which will lead to engine lock up failure in such cases). External seepage is also found near the valley edge of the lower intake manifold.3.1L/3100
L82
The L82 ("M-code") was an updated, SFI version of the MPFI LH0, produced from 1993 through 1999. It featured a structural oil pan, a stiffer redesigned engine block, and sequential
fuel injection . Output for this version was up 20 hp to 160 hp (up 15 kW to 118 kW) at 5200 rpm and 185 ft·lbf (250 N·m) at 4000 rpm. Compression Ratio for the L82 was 9.5:1 and the bore measured convert|89|mm|in|abbr=on while the stroke was convert|84|mm|in|abbr=on giving it a displacement of 191 CID (3,136 cc).Applications:
* 1997-1999Buick Century
* 1994-1996Buick Regal
* 1994-1996Chevrolet Beretta
* 1994-1996Chevrolet Corsica
* 1994-1999Chevrolet Lumina
* 1997-1999Chevrolet Malibu
* 1993-1997Oldsmobile Cutlass Supreme (1993 received both LH0 and L82 3.1 L motors)
* 1994-1999Pontiac Grand Prix
* 1994-1998Pontiac Grand Am
* 1994-1998Buick Skylark
* 1994-1998Oldsmobile Achieva
* 1995-1999Chevrolet Monte Carlo LG8
The LG8 ("J-code") was a modern version of the 3.1 L engine that displaced 191 cubic inches (3,136 cc) [http://media.gm.com/division/2003_prodinfo/03_powertrain/03_car_engine/index.html] , produced since model year 2000Fact|date=February 2007. It still had an iron block and 2-valve pushrod aluminum heads but now had full sequential port fuel injection. The LG8 also featured a new
intake manifold and numerous changes to improve parts sharing with the offshootGM High Value engine family. Emissions were improved with air injection forLEV status. Power was 170 hp-175 hp (127 kW to 131 kW) and torque was 190 ft·lbf–195 ft·lbf (258 N·m to 264 N·m). The LG8 was built inRamos Arizpe, Mexico andTonawanda, New York .Applications:
* 2000-2003Pontiac Grand Prix SE
* 2000-2005Buick Century
* 2000-2003Chevrolet Malibu
* 2000-2001Chevrolet Lumina
* 2002Chevrolet Lumina (Fleet Vehicle)3.4L/3400
GM produced three 3.4 L (204 CID/3,350 cc) variants of the 60° block: The L32, a normal large-bore OHV descendant of the 3.1 L (not to be confused with the 90° Series III L32 supercharged), the LA1, and a performance-oriented
DOHC version, the LQ1.L32
The power rating of the 3.4 L L32 ("S-code") used in the Camaro and Firebird was 160 hp (120 kW ) @ 4,600 rpm and 200 ft·lbf (270 Nm) torque @ 3600 rpm.
Applications:
* 1993-1995Chevrolet Camaro
* 1993-1995Pontiac Firebird LQ1
The LQ1 (also called the Twin Dual Cam or TDC) was a 3.4 L
DOHC V6 motor ("X-code") based on the aluminum headed second generation of GM's 60° engine line, sharing a similar block with itspushrod cousins, the 3.1 L LH0V6 and the then recently retired 2.8 L LB6V6 . The motor was built only for front wheel drive applications, and was featured exclusively in the first generation of GM's W-body platform.It was built from 1991 to 1997. From 1991 to 1993, it used tuned multi-port fuel injection, made 200-210 HP (150-160 kW) @ 5200 RPM and 215 ft·lbf (290 Nm) of torque @ 4000 RPM. From 1994 to 1997, it used sequential port fuel injection, making 215 hp (160 kW) @ 5200 rpm and 225 ft·lbf (300 Nm) of torque @ 4000 rpm. It had four large valves per cylinder. The 3.4 L engine used a cogged belt to drive the four overhead camshafts. Adapting a
pushrod block for the LQ1's overhead cams was difficult, and the 60° angle made this a very tall engine, but power output was impressive. The engine's size and position make the alternator likely to fail and it is difficult to replace.Bore was increased to 92 mm, but the 3.1 L engine's 84 mm stroke was retained. There are only a few interchangeable parts between this DOHC engine and other members of the 60° family, namely the connecting rods and crankshaft.
The heads and intake manifolds were redesigned for the 1996 model year, incorporating a larger throttle body and plenum area, slightly shorter intake runners, cloverleaf combustion chambers, and larger "pill"-shaped exhaust ports. Camshafts and cam timing were also revised for the new, higher RPM powerband.
Optional from 1991 to 1993 was a
Getrag 284 5-speed manualtransaxle , which was also exclusive to theGM W platform and was available only with the LQ1. The electronically controlledHydramatic 4T60-E 4-speed automatictransaxle was the alternative, used during the entire production run.Applications:
* 1991-1994Chevrolet Lumina "Z34" and the Euro "3.4" sedan
* 1991-1995Oldsmobile Cutlass Supreme
* 1991-1996Pontiac Grand Prix
* 1995-1997Chevrolet Monte Carlo "Z34"
* 1995-1997Chevrolet Lumina "LS"
* 1997Chevrolet Lumina "LTZ"LA1
The LA1 3400 ("E-code") was a bored-out version of the L82. It retained the OHV layout of the previous engine, and was first utilized on the 1996 U platform minivans and appeared in a car for the first time in the 1999
Pontiac Grand Am andOldsmobile Alero . A Auto mm|92|1 bore with the same auto mm|84 stroke brought the displacement to 3.4 L (convert|3350|cc|CID|abbr=on|disp=s). Like the LG8, the LA1 featured numerous common parts with the similarGM High Value engine family. Power was up to 170 hp-185 hp (127 kW to 138 kW) and torque was convert|210|ft.lbf|N.m|abbr=on. The 3.4 L engine is known to have intake manifold gasket problems causing engine damage if the owner of the car neglects to check or change the gaskets (if necessary). Many aftermarket companies have released gaskets that correct this problem for good.It is used in the following:
* 1996Chevrolet Lumina APV /Pontiac Trans Sport /Oldsmobile Silhouette
* 1997-2004Chevrolet Venture /Pontiac Montana /Pontiac Trans Sport /Oldsmobile Silhouette
* 1999-2004Oldsmobile Alero GL/GLS
* 1999-2005Pontiac Grand Am SE/GT
* 2001-2005Pontiac Aztek /Buick Rendezvous
* 2000-2005Chevrolet Impala
* 2000-2005Chevrolet Monte Carlo China
Production of the 60° family began in
China with the success of theBuick marque there. Importation of Chinese-built engines to the United States began in 2004 with the LNJ found in theChevrolet Equinox .LB8
The LB8 is General Motors' base
V6 inChina . It is a derivative of the LG8 with the same 89 mm bore and a shorter 66.7 mm stroke for 2.5 L (2490 cc). It is still an iron block with pushrods and an aluminum 2-valve head. Power is 145 hp (108 kW) and 155 ft·lbf (210 N·m). It is built byShanghai GM inShanghai, China .Applications:
* Buick GL/GLX (China)LW9
The LW9 is a larger version of the LB8 with an 80 mm stroke for 3.0 L (2986 cc). Power is 170 hp (127 kW) and torque is 185 ft·lbf (251 N·m).
Applications:
* Buick GL/GLX/GL8 (China)
*Buick LaCrosse LNJ
The 3.4 L LNJ is a 204-cubic-inch (3,350 cc) modified version of the normal 3400 engine. It includes a modified
intake manifold , oil pan, engine cover, and fuel system as well aselectronic throttle control . It is built in China and imported to Canada for use in theChevrolet Equinox andPontiac Torrent . The LNJ makes Convert|185|hp|kW|0|abbr=on and auto ftlbf|210. [http://media.gm.com/us/pontiac/en/product_services/r_cars/r_c_torrent/08index.html]ee also
*
GM High Value engine - The new generation of the GM 60° V6, including the "3900" and VVT-enhanced engines.
*GM H platform
*GM engines References
*Road and Track Magazine, April 1989. "(1989-1990 Turbo Grand Prix performance figures)"
*1995 Corsica/Beretta Service Manual, 1994, General Motors Corporation "(Gen III/L82 Engine's usage in Corsica/Beretta)"External links
* http://www.60degreev6.com/
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