Editing Buick V6 engine (section)

== 3800 V6 ==

=== Pre-Series I ===
==== LN3 Naturally Aspirated ==== <!-- This section is linked from [[Holden VN Commodore]] and [[Oldsmobile Touring Sedan]]. See [[WP:MOS#Section management]] --><!-- This section is linked from [[Holden VN Commodore]] and [[Oldsmobile Touring Sedan]]. See [[WP:MOS#Section management]] -->
[[File:3800 LN3 89 bonneville.JPG|thumb|An LN3 installed in a 1989 [[Pontiac Bonneville]] with a later ICM and Coilpack upgrade instead of the original Magnavox Ignition System.]]
Introduced in 1988 and initially designated VIN code C, the ''3800'' LN3 would later be loosely considered the ''Pre-Series I'', although the older 3.8 SFI (LG3) was still available that year in some models. The LN3 was a major redesign, with a change to on-center [[Bore_(engine)#Bore_pitch|bore spacing]] (created by moving the left-hand bank of cylinders forward relative to the right-hand bank)<ref>[https://wbodytech.com/wiki/engines/buick-3800-v6/ wbodytech Buick 3800 v6]https://wbodytech.com/wiki/engines/buick-3800-v6/</ref> and the addition of a [[balance shaft]]. Other features included a 3×/18× [[Crankshaft position sensor|crank-trigger system]] and [[Multi-point injection|multiport fuel injection]]. This generation continued in use in several GM products into the early 1990s. It produced {{cvt|165|hp|kW|0}} of power and {{cvt|210|lbft|Nm|0}} of torque.

The LN3 is very closely related to the Series I L27 and Series I L67 Supercharged. In fact, [[supercharger]]-related hardware can be fitted to an LN3 without changing the cylinder heads. However, the [[Engine Control Unit|ECM]] would have to be reprogrammed. The L27 has a two piece, upper plenum intake and lower intake, the LN3 is all one piece.

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* 1988–1990 [[Buick Electra]]
* 1988–1991 [[Buick LeSabre]]
* 1988–1990 [[Buick Reatta]]
* 1988–1990 [[Buick Riviera]]
* [[Formula Holden]] (motor racing category)
* 1988–1991 [[Holden Commodore]] ([[Holden VN Commodore|VN Series I]])
* 1988.5–1991 [[Oldsmobile Delta 88]]
* 1988–1990 [[Oldsmobile Ninety-Eight]]
* 1988–1990 [[Oldsmobile Touring Sedan]]
* 1988–1990 [[Oldsmobile Toronado]]
* 1988–1990 [[Oldsmobile Toronado Trofeo]]
* 1988–1991 [[Pontiac Bonneville]]
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{{anchor|LG7}}

==== 3300 (LG7) ====

[[File:GM3300 VIN N.jpg|thumb|General Motors 3300 V6 (VIN N) in a 1990 Buick Skylark Luxury Edition.]]

A smaller 3.3 liter ''3300'' was introduced in 1989 and produced through 1993. It was effectively a lower-deck version of the 3800, with a smaller bore and stroke of {{cvt|3.7x3.16|in|mm|1}} for {{cvt|3341|cc|L cuin|1}}.<ref name="AR92">{{cite book | title = Automobil Revue 1992 | editor-last = Büschi | editor-first = Hans-Ulrich | publisher = Hallwag AG | location = Berne, Switzerland | language = de, fr | page = 433 | volume = 87 |date=5 March 1992 | isbn = 3-444-00539-3 }}</ref> Like the 3800, it used a cast iron block and heads, push rods, and hydraulic lifters.  Unlike the 3800, however, it used a batch-fire injection system rather than sequential injection, as evidenced by the lack of a cam position sensor.  It also did not have a balance shaft. Power output was {{cvt|160|hp|kW|0|}} at 5,200&nbsp;rpm and {{cvt|185|lbft|Nm|0}} at 2,000&nbsp;rpm with a 5,500&nbsp;rpm redline.

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* 1989–1993 [[Buick Century]]
* 1989–1993 [[Buick Skylark]]
* 1992–1993 [[Pontiac Grand Am]]
* 1992–1993 [[Oldsmobile Achieva]]
* 1989–1991 [[Oldsmobile Calais]]
* 1989–1993 [[Oldsmobile Cutlass Ciera]]
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=== Series I ===

==== {{anchor|L27}} L27 SI Naturally Aspirated ====

[[File:3800II L36.JPG|thumb|A 3800 Series I L27 naturally aspirated engine installed transversely in a 1995 [[Buick Regal]].]]

The LN3 was replaced by the {{cvt|3791|cc|L cuin|1}} '''L27''' in mid-1990 and produces {{cvt|170|hp|kW|0}}. The slight power increase was accompanied by more torque in the mid-range, all thanks to a new, two-piece intake manifold with longer runners. Other improvements over the LN3 included wider [[connecting rod]] bearings, a new [[timing chain]] tensioner, dual-wall exhaust pipes, new heat shields for the exhaust manifolds, and sound absorbing, composite molded valve covers.<ref name=WAW260475>{{cite journal | journal = Ward's Auto World | volume = 26 | number = 4 | publisher = Ward's Communications | date = April 1990 | page = 75 | title = Park Avenue gets electronic transaxle | first = Joel D. | last = Pietrangelo }}</ref> This engine is referred to as the Series I 3800, or 3800 TPI (Tuned Port Injection).

In Australia, the LN3 was also replaced by the L27 by Holden who used the engine in their series 2 (1991) VN Commodore range. However, the Australian L27 retained the LN3's one piece upper intake and lower plenum. Power was still boosted to {{cvt|127|kW|hp|0}} for the Holden L27, before being boosted to {{cvt|130|kW|PS hp|0}} in the revised VR Commodore in 1993. The L36 made its debut in 1995.

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* 1992–1995 [[Buick LeSabre]]
* 1991–1994 [[Buick Park Avenue]]
* 1991 [[Buick Reatta]]
* 1990–1995 [[Buick Regal]]
* 1991–1993 [[Buick Riviera]]
* 1992–1995 [[Chevrolet Lumina APV]]
* 1991–1995 [[Holden Commodore]] ([[Holden VN Commodore|VNII]], [[Holden VP Commodore|VP]], [[Holden VR Commodore|VR]])
* [[Holden Caprice]] ([[Holden VQ Statesman|VQ]], [[Holden VR Statesman|VR]])
* 1992–1994 [[Pontiac Bonneville]]
* 1992–1995 [[Pontiac Trans Sport]]
* 1992–1994 [[Oldsmobile Eighty-Eight]]
* 1992–1994 [[Oldsmobile Ninety-Eight]]
* 1991–1992 [[Oldsmobile Toronado]]
* 1991–1992 [[Oldsmobile Toronado Trofeo]]
* 1992–1995 [[Oldsmobile Silhouette]]
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[[Image:95RivEngine.jpg|thumb|A [[supercharged]] 3800 (transverse mount) installed in a [[Buick Riviera]] for 1995, the last year of Series I L67 production. Power is {{cvt|225|hp|0}}/{{cvt|275|lbft|Nm|0}} for this version.]]

==== {{anchor|L67}} L67 SI Supercharged ====
The Series I Supercharged engine went through two supercharger revisions (Gen2 and Gen3) and the horsepower improved between initial launch and the time that the Series II L36 was introduced. The M62 supercharger was manufactured by [[Eaton Corporation|Eaton]], for the GM 3800 SI engine. HP was rated at 205 for 1991–1993 engines (Gen2 supercharger) with a {{convert|2.55|in|mm|adj=on}} pulley, and 225 for 1994–1995 engines (Gen3 supercharger). All of the additional horsepower for 1994–95 Gen3 supercharged engines was gained by using epoxy (not Teflon as commonly believed) coated supercharger rotors to improve efficiency, a larger supercharger inlet and throttle body. Thus, the Gen3 utilized a {{convert|2.85|in|mm|adj=on}} pulley versus the {{convert|2.55|in|mm|adj=on}} pulley on the Gen2. The easiest way to spot the difference between the Gen2 and Gen3 is the smaller pulley and the ribs on the side of the Gen2 extend all the way down the sides, while the Gen3 ribs are on only the top. They perform slightly differently, and interchanging one without tuning may cause engine problems. Redline on Gen3 engines is at 6000&nbsp;rpm, but the ECM will shift at 5400&nbsp;rpm without performance shift enabled.

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*1991–1995 [[Buick Park Avenue#First generation (1991–1996)|Buick Park Avenue]] Ultra
*1992–1995 [[Oldsmobile 98#Twelfth generation (1991–1996)|Oldsmobile Ninety-Eight]] Regency Elite (optional), Touring Sedan
*1992-1995 [[Pontiac Bonneville#Ninth generation (1992–1999)|Pontiac Bonneville]] SE with H4U RPO, not badged - SLE (optional SC package), SSE (optional), and SSEi
*1995 [[Buick Riviera#Eighth generation (1995–1999)|Buick Riviera]] (optional)
*1995 [[Oldsmobile 88#Tenth generation (1992–1999)|Oldsmobile Eighty-Eight]] LS (optional), LSS (optional)
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=== Series II ===
Introduced in 1995, the ''Series II'' is quite a different engine. It is also by far the most popular of the 3800 family for its power, smoothness, fuel efficiency, and reliability, although the stroke for the 3.8 liter engine remained at {{cvt|3.4|in}}, and the bore remained at {{cvt|3.8|in|mm}}. That said, the engine architecture was vastly changed. The deck height is shorter than the Series I, reducing weight and total engine package size. This required that the piston connecting rods be shortened {{cvt|1|in||1}}, and the crankshaft was also redesigned. A new [[intake manifold]] improved breathing while a redesigned cylinder head featured larger valves and a higher compression ratio. The result was {{cvt|205|hp|0}} and {{cvt|230|lbft|Nm|0}}, better fuel economy, and {{cvt|26|lb|0}} lighter overall weight (to {{cvt|392|lb|0}}). This 3800 weighs only {{cvt|22|lb|0}} more than the all-aluminum [[GM High Feature engine|High Feature V6]] that currently dominates GM's six-cylinder applications, despite being an all cast-iron design.

The new intake manifold greatly improved airflow. To meet emissions standards, an EGR tube was placed in the intake manifold to reduce combustion temperatures.

The 3800 Series II was on the [[Ward's 10 Best Engines]] list for 1995 through 1997.

GM recalled 1.5 million vehicles with this engine on April 14, 2009 due to risk of fire from engine oil leaking under the valve cover gaskets onto hot exhaust manifolds. The fire could spread to the nearby plastic spark plug wire retainers on the valve cover and then to the rest of the engine compartment. GM fitted the affected vehicles with redesigned spark plug wire retainers.<ref name="reuters.com">{{cite news|url=https://www.reuters.com/article/domesticNews/idUSTRE53D31P20090414|title=GM recalls 1.5 million cars due to fire risk|access-date=2009-04-14|work=reuters.com | first=Soyoung | last=Kim | date=April 14, 2009}}</ref> These engines were noted for having problems with the plastic upper intake manifold cracking around the EGR passage. The engine would then [[hydrolock]]. The lower intake gaskets and upper intake manifolds were revised, correcting all these issues.

==== {{anchor|L36NA}} L36 SII Naturally Aspirated ====
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[[Image:GM 3800 Series Naturally Aspirated.jpg|thumb|Another variation of the L36 engine in a 1995 [[Oldsmobile 88]]]]

* 1996–2005 [[Buick LeSabre]]
* 1995–2005 [[Buick Park Avenue]]
* 1996–2004 [[Buick Regal]] LS
* 1995–1997 [[Buick Riviera]]
* 1995 California only, 1996–2002 [[Chevrolet Camaro]]
* 2000–2005 [[Chevrolet Impala]]
* 1998–1999 [[Chevrolet Lumina LTZ]]
* 1999–2004 [[Chevrolet Omega]] CD
* 1998–2005 [[Chevrolet Monte Carlo]] (Z34, LT, SS)
* 1995–2004 [[Holden Commodore]] ([[Holden VS Commodore|VS]], [[Holden VT Commodore|VT]], [[Holden VX Commodore|VX]], [[Holden VY Commodore|VY]])
* [[Holden Caprice]] ([[Holden VS Caprice|VS]], [[Holden WH Caprice|WH]], [[Holden WK Caprice|WK]])
* [[Holden Ute]] ([[Holden VX Commodore|VU]], [[Holden VY Commodore|VY]])
* 1995–1996 [[Oldsmobile Ninety-Eight]]
* 1995–1999 [[Oldsmobile Eighty-Eight]]
* 1998–1999 [[Oldsmobile Intrigue]]
* 1996–1998 [[Oldsmobile LSS]]
* 1997–1998 [[Oldsmobile Regency]]
* 1995–2005 [[Pontiac Bonneville]]
* 1995 California only, 1996–2002 [[Pontiac Firebird]]
* 1997–2003 [[Pontiac Grand Prix]]
{{hidden end}}[[Image:Ecotec V6 of a 1997-2000 Holden VT Commodore 02.jpg|thumb|A variation of the L36 engine in a 1998 [[Holden VT Commodore]]]]

==== L67 SII Supercharged ====
[[Image:Regal l67.jpg|thumb|A 3800 Series II L67 Supercharged V6 engine in a 1998 [[Buick Regal]] GS.]]
The '''L67''' is the supercharged version of the 3800 Series II [[#L36|L36]] and appeared in 1996, one year after the naturally aspirated version. It uses the Eaton Generation III M90 supercharger with a {{cvt|3.8|in}} pulley, a larger throttle body, different fuel injectors, different cylinder heads, and a different lower intake manifold. The L67 and L36 do not share pistons. L67 pistons are heavier and have a different height to lower compression. Both engines share the same engine blocks, but compression is reduced from 9.4:1 in the L36 to 8.5:1 for the L67. GM listed the engine output as {{cvt|240|hp|0}} and {{cvt|280|lbft|Nm|0}} of torque. Final drive ratios are reduced in most applications, for better fuel economy and for improved use of the engine's torque in the low RPM range. Like most 3800 V6s, the engine is well known for its reliability and low maintenance costs. The engine is a popular choice for aftermarket modification thanks to its very strong internals and impressive power gains from basic upgrades. The engine was built in [[Flint, Michigan]], and was certified LEV in 2001.

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* 1996 [[Buick Park Avenue#First generation (1991–1996)|Buick Park Avenue]] Ultra (C-body)
* 1997–2005 [[Buick Park Avenue#Second generation (1997–2005)|Buick Park Avenue]] Ultra (G-body)
* 1997.5–2004 [[Buick Regal#Fourth generation (1997)|Buick Regal]] GS / GSE / GSX (SLP)
* 1996–1999 [[Buick Riviera#Eighth generation (1995–1999)|Buick Riviera]] (optional 1996-97, std. 1998-99)
* 2004–2005 [[Chevrolet Impala#Eighth generation (2000–2005)|Chevrolet Impala]] SS
* 2004–2005 [[Chevrolet Monte Carlo#Sixth generation (2000–2007)|Chevrolet Monte Carlo]] SS Supercharged
* 1996–1999 [[Oldsmobile 88#Tenth generation (1992–1999)|Oldsmobile Eighty-Eight]] LSS (limited)
* 1996–1999 [[Pontiac Bonneville#Ninth generation (1992–1999)|Pontiac Bonneville]] SSEi (H-body)
* 2000–2003 [[Pontiac Bonneville#Tenth generation (2000–2005)|Pontiac Bonneville]] SSEi (G-body)
* 1997–2003 [[Pontiac Grand Prix#1997|Pontiac Grand Prix]] GTP / GTX (SLP)
* 1996–2004 [[Holden Commodore VS]] (series II), [[Holden Commodore VT|VT]], [[Holden Commodore VX|VX]], [[Holden Commodore VY|VY]]
* 1996–2004 [[Holden Caprice]] and Statesman [[Holden Caprice#VS|VS]] (Series I, II, and III), [[Holden Caprice#WH|WH]], [[Holden Caprice#WK|WK]]
* 2001–2004 [[Holden Monaro#Third generation (2001–2006)|Holden Monaro]] (V2) CV6
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=== Series III ===
The ''Series III'' engines include many changes. The upper and lower [[intake manifold]] is now aluminum on the naturally aspirated models. Intake ports are mildy enlarged; {{cvt|1.83|in|1}} intake valves (instead of {{cvt|1.8|in|1}} as on Series II) and {{cvt|1.52|in|1}} exhaust valves were introduced in 2003 engines, just before switching to Series III. [[Electronic throttle control]] is added to all versions, as is returnless [[fuel injection]]. Stronger powdered metal sinter forged connecting rods are used in 2004+ supercharged, and 2005+ naturally aspirated engines, instead of the cast iron style from Series II engines. Emissions are also reduced.

Also note that Series III engines are the base for any 3800 produced for the 2004 year and up. This means the same block, heads, and connecting rods apply to any remaining Series II engines made after 2004 also. The difference is that Series III engines received the new superchargers (Generation 5 – Eaton M90 – if equipped), intake manifolds, fuel systems, powdered connecting rods, as well as larger intake valves, drive by wire throttle body and electronics.

==== L26 SIII Naturally Aspirated ====
[[Image:3800SeriesIII 02.jpg|thumb|L26 engine in a [[Pontiac Grand Prix]]]]
The ''L26'' is the ''Series III'' version of the 3800. It is still a {{cvt|231|cuin|L|1|order=flip}} design. Compression remains at 9.4:1 as with the L36, but the aluminum upper and lower intake (2004+) and stronger connecting rods (2005+) are the primary physical changes. The powdered metal connecting rods were meant to be introduced in 2004 along with the L32, but the GM plant in Bay City, Michigan that supplies the Flint, Michigan plant could not achieve the desired production dates in time for that engine year.

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* 2004–2008 [[Pontiac Grand Prix#2004|Pontiac Grand Prix]]
* 2005–2009 [[Buick LaCrosse#First generation (2005)|Buick LaCrosse/Allure]]
* 2006–2008 [[Buick Lucerne]]
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==== L32 SIII Supercharged ====
The ''L32'' is a [[supercharged]] ''Series III''.
Introduced in 2004, the main differences between the L67 and the L32 are the L32's electronic throttle control, slightly improved cylinder head design, and updated Eaton supercharger, the Generation 5 M90. Power output is up to {{cvt|260|hp|kW|0}} in the Grand Prix GTP.

As with the L67, premium fuel (91 octane or higher) is required, but the PCM can compensate for lower octane fuel at the cost of lower power output. The use of below 87 octane fuel can cause detonation that eventually leads to engine damage and failure.

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* 2004–2005 [[Pontiac Grand Prix#2004|Pontiac Grand Prix]] GTP
* 2006–2007 [[Pontiac Grand Prix#2004|Pontiac Grand Prix]] GT
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