The GM LFX 3.6 engine is a V6 engine produced by General Motors. It is part of the GM High Feature engine family and is an updated version of the earlier LLT engine. The LFX engine is designed for improved efficiency and performance over its predecessor, while still maintaining a high level of reliability.
The LFX 3.6 engine features direct injection, variable valve timing, and an aluminum block and heads. It produces up to 308 horsepower and 275 lb-ft of torque. The engine is used in a wide range of GM vehicles, including the Chevrolet Camaro, Impala, and Traverse, as well as the Buick LaCrosse and Regal.
Engine specifications for GM LFX 3.6 l
| Displacement | 3564 cc |
| Power system | Direct Injection |
| Engine power | 300 – 325 hp |
| Torque | 355 – 375 Nm |
| Cylinder block | Aluminum V6 |
| Cylinder head | Aluminum 24v |
| Cylinder diameter | 94 mm |
| Stroke | 85.6 mm |
| Compression ratio | 11.5 |
| Engine features | DOHC |
| Timing Chain/Belt | Timing Chain |
| Variable Valve Timing (VVT) | Dual VVT |
| Turbocharger | No |
| Oil capacity/Recommended oil | 5.7 l 5W-30 |
| Fuel type | Medium/Plus |
| Euro class | EURO 5 |
| Average lifespan | 300 000 km |
The dry weight of the LFX engine is 175 kg.
The LFX engine number is located on the block and box junction.
GM LFX Engine Fuel consumption
Here is a detailed table outlining the fuel consumption for the GM LFX engine in some popular GM vehicles:
| Vehicle Model | MPG (City) | MPG (Highway) | Combined MPG |
|---|---|---|---|
| Chevrolet Camaro (V6) | 16 | 26 | 20 |
| Chevrolet Impala (V6) | 19 | 28 | 22 |
| Chevrolet Traverse (V6) | 18 | 27 | 21 |
| Buick LaCrosse (V6) | 20 | 30 | 24 |
| Buick Regal (V6) | 19 | 27 | 22 |
It is important to note that fuel consumption may vary depending on driving habits, vehicle weight, and other factors. These figures are based on EPA estimates and are meant to provide a general idea of the fuel consumption for the GM LFX engine in these popular GM vehicles.
What cars have the LFX 3.6 l engine
| LaCrosse 2 (GMX353) | 2011 – 2016 |
| ATS I (A1SL) | 2012 – 2015 |
| CTS III (A1LL) | 2013 – 2015 |
| SRX II (GMT267) | 2011 – 2016 |
| XTS I (P1LL) | 2012 – 2019 |
| Camaro 5 (GMX521) | 2011 – 2015 |
| Colorado 2 (GMT31XX) | 2014 – 2016 |
| Impala 9 (GMX211) | 2011 – 2016 |
| Impala 10 (GMX352) | 2013 – 2020 |
| Equinox 2 (GMT192) | 2012 – 2017 |
| Canyon 2 (GMT31XX) | 2014 – 2016 |
| Terrain 1 (GMT177) | 2012 – 2017 |
Common LFX Engine Issues
Excessive Oil Consumption, Water Pump Failure, Front Cover Oil Leaks, and Timing Chain Failure
The LFX engine is a popular engine found in many GM vehicles. While it is known for its reliability, there are a few common issues that can arise with this engine. In this article, we will examine the four most common LFX engine problems and provide solutions to help you prevent or fix them.
GM LFX Excessive Oil Consumption Problems
One of the most common issues with the LFX engine is excessive oil consumption. GM claims that consuming up to 1 quart of oil every 2,000 miles is normal for this engine. However, this can cause problems if the oil change intervals are not followed. The “change engine oil” light appears every 8,000-12,000 miles, but at 1 quart per 2,000 miles, the engine can become very low on oil before the light appears.
Low oil levels can cause poor engine timing, which can lead to cylinder misfires and codes being thrown for the camshaft sensor. Timing chain failure is also a common issue caused by low oil levels. Symptoms of excess oil consumption include low engine oil light, losing 1 quart of oil every 2,000 miles or more, camshaft sensor engine code, and timing chain failure.
To prevent or fix oil consumption, it is important to check oil levels and top off the oil in between changes. GM recommends oil changes every 8,000+ miles, but it is better to change the oil every 5,000 miles. GM has recalled the oil life monitoring system to suggest earlier oil changes, which can help prevent low oil levels. Alternatively, keeping an extra quart or two of oil in your trunk and topping it off every few thousand miles can also help. GM also has an oil supply kit that can keep the cam phasers and timing chain adequately lubricated, but it requires about 15 hours of labor to install.
LFX Water Pump Problems
The water pump is responsible for circulating coolant throughout the engine and keeping engine temperatures within spec. On the LFX engine, the water pump is known to fail around the 80,000-100,000 mile range. Symptoms of water pump failure include coolant leaks onto the underside of the engine, engine overheating, and whining noise from the engine.
To prevent engine damage, it is important to replace the water pump as soon as coolant leaks are noticed. A dealership will likely quote near $1,000 for a water pump replacement on the LFX, but it can be DIY’d in a few hours for around $100 for the parts.
LFX Timing Chain Cover Leaks
The timing chain cover is responsible for protecting and lubricating the timing chain. Over time, the gasket between the cover and engine block wears down, causing oil to leak out of the front cover. Symptoms of a failing LFX timing chain cover gasket include oil leaking from the timing cover, low engine oil light or excess oil consumption, bad engine performance, knocking sounds from the engine, and engine codes for vacuum leaks or AFR issues.
It is important to replace the gasket immediately to prevent performance issues and low oil levels that can further damage the timing chain and engine internals.
LLT & LFX Timing Chain Failure
Timing chain failure is often caused by low oil levels, which is a common issue with the LFX engine. When oil levels become low, the timing chain is one of the first components to be starved of oil. The timing chain can become loose and jump gears, causing engine damage.
To prevent timing chain failure, it is important to follow GM’s recommended oil change intervals and check oil levels regularly. If you notice any symptoms of low oil levels or timing chain failure, it is important to take action immediately to prevent further damage to the engine. Timing chain guides may also need to be replaced if they wear down due to lack of lubrication.
In conclusion, while the LFX engine is known for its reliability, it is important to be aware of these common issues and take preventive measures to avoid them. Regularly checking oil levels and following GM’s recommended oil change intervals can help prevent excessive oil consumption and timing chain failure. Additionally, replacing the water pump and timing chain cover gasket as soon as symptoms are noticed can prevent further damage to the engine. By taking these precautions, you can ensure the longevity and reliability of your LFX engine.
The maintenance cost and intervals for the GM LFX engine
| Maintenance Item | Interval | Cost (Approximate) |
|---|---|---|
| Engine Oil Change | 5,000 – 8,000 miles | $50 – $100 |
| Engine Air Filter | 30,000 miles | $15 – $30 |
| Spark Plug Replacement | 100,000 miles | $100 – $200 |
| Timing Chain Replacement | 150,000 miles | $1,000 – $2,000 |
| Water Pump Replacement | 80,000 – 100,000 miles | $700 – $1,000 |
| Coolant Flush | 100,000 miles | $100 – $150 |
| Transmission Fluid Change | 50,000 miles | $100 – $200 |
| Brake Fluid Flush | 30,000 – 60,000 miles | $100 – $150 |
It is important to note that these are approximate costs and intervals, and may vary depending on the specific vehicle and location. It is always best to consult the vehicle owner’s manual or a trusted mechanic for the most accurate information on maintenance costs and intervals for the GM LFX engine. Additionally, regular maintenance can help prevent costly repairs down the line, so it is important to keep up with maintenance tasks to ensure the longevity and reliability of the engine.
Reliability
The GM LFX engine is generally considered to be a reliable engine. It is a popular engine found in many GM vehicles, including the Chevrolet Camaro, Impala, and Traverse, as well as the Buick LaCrosse and Regal.
The LFX engine has a number of features that contribute to its reliability, including direct injection, variable valve timing, and an aluminum block and heads. These features help the engine to be more efficient and to produce more power while still being reliable.
However, like any engine, the LFX is not perfect and does have some common issues. These issues include excessive oil consumption, water pump failure, front cover oil leaks, and timing chain failure, as discussed in the previous article.
Overall, the LFX engine has a good reputation for reliability, but it is important to be aware of these common issues and to take preventive measures to avoid them. Following the recommended maintenance schedule and regular oil changes can help ensure the longevity and reliability of the LFX engine.
Price
The table outlining the estimated price range for a GM LFX 3.6 Engine:
| Condition | Price Range |
|---|---|
| New | $4,000 – $5,500 |
| Remanufactured | $3,000 – $4,000 |
| Used (Low Mileage) | $1,500 – $2,500 |
| Used (High Mileage) | $500 – $1,000 |
It’s important to note that prices can vary depending on a variety of factors, including location, availability, and the specific seller or retailer. Additionally, prices can fluctuate over time based on supply and demand. If you’re in the market for a GM LFX 3.6 Engine, it’s recommended to do your research and compare prices from multiple sources to ensure you’re getting the best deal possible.
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