Chrysler LH engine
|Manufacturer||Chrysler Corporation (1998)
DaimlerChrysler AG (1998–2007)
Chrysler LLC (2007–2009)
Chrysler Group LLC (2009-2010)
|Successor||Chrysler Pentastar engine|
|Displacement||2,736 cc (167.0 cu in)|
|Cylinder bore||86 mm (3.4 in)|
|Piston stroke||78.5 mm (3.09 in)|
|Cylinder block alloy||Aluminum|
|Cylinder head alloy||Aluminum|
|Valvetrain||Dual overhead camshaft|
|Fuel system||Sequential Multiple-Port Fuel Injection|
|Oil system||Wet sump|
The LH engine was a series of V6 engines developed by Chrysler Corporation for its LH platform cars. It is a 60-degree V6 designed for front-wheel drive applications, later adapted to rear-wheel drive ones. The 2.7 liter LH engine is based on the SOHC 3.5 L engine, though bore spacing, cylinder bore, stroke, and assembly site are different.
2.7 L 
The 2.7 L (2736 cc, 167 CID) EER version debuted in 1998 and is built in Kenosha, Wisconsin. It is a DOHC 4-valve design. Bore is 86 mm and stroke is 78.5 mm. It is an aluminum block with cast-iron cylinder liners and aluminum heads. Output has varied depending on the application but typical was 200 hp (150 kW) at 5800 rpm with 190 pound-feet (258 N·m) of torque at 4850 rpm. In terms of emissions, this was a TLEV engine; it runs on regular-octane (87) gasoline. Compression when launched in 1998 was 9.7:1 (increased to 9.9:1 in the LX cars). Redline occurred at 6,464 rpm, originally; and at 6,600 rpm as revised for the LX. The 24 valves are actuated by hydraulic end-pivot roller followers and hydraulic lifters. Fuel injection was sequential for six ports for all engines.
The 2.7 differed from the 3.5 liter engine from which it was derived in many ways. The Magnum version featured a variable intake system to create a supercharging effect at different engine speeds. A three-row chain replaced the timing belt of the 3.5 liter engine, and the 2.7 in the LX also has electronic throttle control and an enhancement to the intake manifold (described in greater detail below), the former to allow for the use of electronic stability control.
In 2004, the 2.7 liter engine was adapted for use in the LX series of cars, dropping peak power to 189 hp (141 kW) at 6400 rpm and 190 pound-feet (258 N·m) of torque at 4,000 rpm; but increasing torque at launch and during mid-range operation for everyday driving. Chrysler claimed that part-throttle torque was increased by up to 10% in the primary driving range, 2100–3400 rpm. Horsepower again dropped in 2009 on the LX cars to 178 hp (133 kW) on the Chrysler 300 and Charger, but remains at 189 for the Chrysler Sebring.
Vehicles using this engine include:
- 1998–2004 Chrysler Concorde
- 1998–2004 Dodge Intrepid/Chrysler Intrepid
- 2001–2006 Dodge Stratus sedan
- 2005–2008 Dodge Magnum SE
- 2001–2010 Chrysler Sebring convertible and sedan
- 2005–2010 Chrysler 300
- 2006–2010 Dodge Charger SE (Initially, only fleet models received the 2.7 L in 2006)
- 2008–2010 Dodge Avenger
- 2002–2004 Chrysler Intrepid (Canada)
- 2009–2010 Dodge Journey (non-US markets)
Oil sludge and other known problems 
Oil sludge buildup in an automobile engine results most often from poor maintenance, often from not changing engine oil at the recommended intervals, rather than to a problem with the engine. The 2.7 L V6 engines have suffered from oil sludge contamination. In February 2009, five separate class action lawsuits related to the alleged oil sludge defect were consolidated to the District of New Jersey. During the Chrysler bankruptcy proceedings, there was concern among consumer advocate groups that Chrysler's proposed "free and clear" sale of assets to "New Chrysler" would allow the automaker to avoid liability for the oil sludge defect.
The engine was affected by an oil sludge problem and premature timing chain tensioner failure, which were fixed around 2002-2004. The oil sludge issue appears to have been caused by issues with the crankcase ventilation system, and while it affected a minority of engines, it could cause complete failure In some cases, neglected maintenance aided in premature failure (missed oil changes or increased intervals between oil changes).
Audi, Volkswagen, Lexus, Toyota, and Saab extended their engine warranty on some models to eight years when faced with complaints of similar problems. In a similar problem, Toyota settled a class-action engine-sludge suit in 2007 that covered an estimated 2.5-million Toyota and Lexus vehicles made between 1997 and 2002.
See also 
- The 2.7, 3.2, 3.5, and 3.8 Liter V6 Mopar (Chrysler-Plymouth-Dodge) Engines, allpar.com, retrieved 2008-06-16
- 2009 Chrysler Sebring, Chrysler 300, Dodge Charger compared at www.cars.com, retrieved 2010–04–27.
- "The black death of sludge". Consumer Reports. June 2011. Retrieved 2011-07-28.
- "Engine Failure and the Chrysler 2.7L V6 engine". OilSludge.com. Retrieved 2010-09-29.
- "The Center For Auto Safety - Oil Sludge". Autosafety.org. Retrieved 2010-09-29.
- Mary Connelly (2004-08-30). "Chrysler V-6 has sludge problems". Automotive News.
- MDL No. 2006 Transfer Order, In RE: Chrysler LLC 2.7 Liter V-6 Engine Oil Sludge Products Liability Litigation, U.S. Judicial Panel on Multidistrict Litigation, February 10, 2009.
- Statement of Clarence M. Ditlow On Auto Industry Bankruptcies Before the House Judiciary Committee, May 21, 2009