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3100 3.1L V-6 (LG
Car Engine
2005 Model Year Summary
LONG RELIEF A500 UPPER AND LOWER THRUST BEARING
Main bearings hold the crankshaft firmly against the bottom of the block. In contrast, thrust bearings prevent the crankshaft from moving out of position on horizontal plain. The new thrust bearings for the LG8 use a reformulated amalgam of metals providing an incremental increase in engine durability and quality.
EXHAUST MANIFOLD AND GASKETS
In a move to commonize parts between engines in the 60-degree V-6 family, the LG8 now utilizes the same exhaust manifolds and gaskets as the LA1 3400 and LX9 3500 engines.
NEW THROTTLE BODY GASKET MATERIAL
The new material used for the throttle body gasket is improved and will incrementally enhance the long-term performance of this engine.
MULTEC-2 SHROUDED-TIP INJECTORS AND MODIFIED FUEL RAIL ASSEMBLY
Fuel quality, fuel system maintenance, environmental factors and vehicle age can all work together to clog fuel injectors. The new shrouded-tip injectors help to stave off clogging by protecting the orifice of the fuel injector with a sleeve-like cover. The orifice is recessed within the shroud, making it much more difficult for byproducts of the combustion cycle to clog the injector opening. Normally, clogged fuel injectors are only an issue on high-mileage vehicles, and this change was made to improve the owner satisfaction levels of long-term owners. The fuel rail assembly required modification to accommodate the new injectors.
OXYGEN SENSORS
These new sensors improve diagnostic capabilities for the on-Board Diagnostic II system (OBD II). This benefit helps improved long-term serviceability.
OVERVIEW
Built at the world's largest automotive engine assembly site in Tonawanda , N.Y. , the 3100 V-6 was developed as a V-6, rather than a shortened V-8. The 3100 has been improved annually to enhance fuel economy and durability and to meet increasingly stringent emissions mandates. It remains one of GMs most popular V-6 engines because it satisfies customers who appreciate fuel economy and low cost of ownership, and still delivers the power for good vehicle performance. The 3100 V-6 (LG is used exclusively in the Buick Century.
For the 2004 model year, a myriad of improvements were made to the 3100. Components such as gaskets and water pumps were changed to further improve engine quality and durability. These refinements continued GM's commitment to continuous improvement that for 2003, added iridium spark plug technology to the 3100. These plugs have an iridium core in the conductor to maintain spark density over their 100,000 mile life, helping ensure the same fuel efficiency and emissions performance over the last 10,000 miles as the first. Required maintenance was further reduced with refinements to GMs industry-leading Oil Life System. The Oil Life System records and analyzes a number of variables, including engine speed, temperature, load or rpm variance, and period of operation at any given load and temperature, then calculates oil degradation and recommends an oil change when the oil is near the end of its useful life rather than according to a predetermined mileage interval. The Oil Life System proved so effective that the upward limit on the oil change interval for the 3100 was removed. The owners manual in cars equipped with the 3100 continues to recommend an oil change at least once a year.
For 2002, the cruise control module was improved with state-of-the-art electronic circuitry and a new control algorithm that updates itself every 30 seconds.
In 2000, the 3100 was equipped with a high-flow intake manifold and cylinder heads developed for the new 3400 3.4L V-6 (RPO LA1). The GM 60-degree V-6 engine was initially introduced in 1980 front-wheel-drive passenger cars as a 2.8-liter engine.
With steady application of advanced technologies and improvements in noise, vibration and harshness control, the 3100 V-6 continues to deliver solid performance for buyers who emphasize value and low cost of ownership.
Car Engine 2005 Model Year Summary
- Long relief A500 upper and lower thrust bearing
- Exhaust manifold and gaskets
- Revised throttle body gasket material
- Modified fuel rail assembly to implement the "shrouded tip" Multec 2 Injectors
- 7.5 watt, post-converter oxygen sensor
LONG RELIEF A500 UPPER AND LOWER THRUST BEARING
Main bearings hold the crankshaft firmly against the bottom of the block. In contrast, thrust bearings prevent the crankshaft from moving out of position on horizontal plain. The new thrust bearings for the LG8 use a reformulated amalgam of metals providing an incremental increase in engine durability and quality.
EXHAUST MANIFOLD AND GASKETS
In a move to commonize parts between engines in the 60-degree V-6 family, the LG8 now utilizes the same exhaust manifolds and gaskets as the LA1 3400 and LX9 3500 engines.
NEW THROTTLE BODY GASKET MATERIAL
The new material used for the throttle body gasket is improved and will incrementally enhance the long-term performance of this engine.
MULTEC-2 SHROUDED-TIP INJECTORS AND MODIFIED FUEL RAIL ASSEMBLY
Fuel quality, fuel system maintenance, environmental factors and vehicle age can all work together to clog fuel injectors. The new shrouded-tip injectors help to stave off clogging by protecting the orifice of the fuel injector with a sleeve-like cover. The orifice is recessed within the shroud, making it much more difficult for byproducts of the combustion cycle to clog the injector opening. Normally, clogged fuel injectors are only an issue on high-mileage vehicles, and this change was made to improve the owner satisfaction levels of long-term owners. The fuel rail assembly required modification to accommodate the new injectors.
OXYGEN SENSORS
These new sensors improve diagnostic capabilities for the on-Board Diagnostic II system (OBD II). This benefit helps improved long-term serviceability.
OVERVIEW
Built at the world's largest automotive engine assembly site in Tonawanda , N.Y. , the 3100 V-6 was developed as a V-6, rather than a shortened V-8. The 3100 has been improved annually to enhance fuel economy and durability and to meet increasingly stringent emissions mandates. It remains one of GMs most popular V-6 engines because it satisfies customers who appreciate fuel economy and low cost of ownership, and still delivers the power for good vehicle performance. The 3100 V-6 (LG
is used exclusively in the Buick Century. For the 2004 model year, a myriad of improvements were made to the 3100. Components such as gaskets and water pumps were changed to further improve engine quality and durability. These refinements continued GM's commitment to continuous improvement that for 2003, added iridium spark plug technology to the 3100. These plugs have an iridium core in the conductor to maintain spark density over their 100,000 mile life, helping ensure the same fuel efficiency and emissions performance over the last 10,000 miles as the first. Required maintenance was further reduced with refinements to GMs industry-leading Oil Life System. The Oil Life System records and analyzes a number of variables, including engine speed, temperature, load or rpm variance, and period of operation at any given load and temperature, then calculates oil degradation and recommends an oil change when the oil is near the end of its useful life rather than according to a predetermined mileage interval. The Oil Life System proved so effective that the upward limit on the oil change interval for the 3100 was removed. The owners manual in cars equipped with the 3100 continues to recommend an oil change at least once a year.
For 2002, the cruise control module was improved with state-of-the-art electronic circuitry and a new control algorithm that updates itself every 30 seconds.
In 2000, the 3100 was equipped with a high-flow intake manifold and cylinder heads developed for the new 3400 3.4L V-6 (RPO LA1). The GM 60-degree V-6 engine was initially introduced in 1980 front-wheel-drive passenger cars as a 2.8-liter engine.
With steady application of advanced technologies and improvements in noise, vibration and harshness control, the 3100 V-6 continues to deliver solid performance for buyers who emphasize value and low cost of ownership.