A Guide to the Engine Timing Chain Kit for the 2011-2017 Buick Regal
Understanding the common timing chain issues in the 2.4L and 2.0L Ecotec engines and how to fix them for good.
- The 2.4L and 2.0L Ecotec engines in 2011-2017 Regals have a known history of timing chain component failure.
- Do not ignore a rattling noise on startup; it's a critical warning of a failing timing system that can lead to catastrophic engine damage.
- This is a complex, labor-intensive job best left to professional mechanics.
- When replacing the kit, also replace the water pump and consider a quality aftermarket kit which may have improved components.
A Known Issue for Regal Owners
If you own a 2011-2017 Buick Regal with either the 2.4L or 2.0L Turbo Ecotec engine, you should be aware of potential timing chain problems. These engines are widely known for issues like stretched timing chains, failing plastic guides, and faulty tensioners. These problems are not just rare occurrences; they are a common complaint among owners of GM vehicles with these engines. Often, the issue isn't the chain itself but the components that support it, like the tensioners or guides, which can wear out or break. When a plastic guide breaks, pieces can fall into the oil pan, clogging the oil pickup tube and leading to oil starvation.
Don't Ignore the Rattle
🎬 Watch: Hear what a failing timing chain rattle sounds likeA rattling noise from the engine, especially on a cold start, is the most common sign of a timing chain problem. This sound is often the loose chain slapping against the timing cover or what's left of the plastic guides. Ignoring this can lead to the chain jumping a tooth—or breaking entirely. Since the Ecotec is an interference engine, a broken chain will cause the pistons to hit the valves, resulting in catastrophic engine damage.
OEM vs. Aftermarket Kits
When it's time for a replacement, you'll have to choose between an original equipment manufacturer (OEM) kit and an aftermarket one. While OEM parts are a direct replacement, some aftermarket companies have engineered their kits to address the original design's weak points. For example, some aftermarket kits may include guides made from more durable materials than the original plastic. Brands like Cloyes are well-regarded in the industry and are often considered a top-tier choice for timing components. Dayco and Gates are also established brands known for quality parts. INA is a major OEM supplier and is known for high-quality tensioners and bearings. For this repair, a quality aftermarket kit can be a smart choice, potentially offering a more durable solution than the original parts that were prone to failure.
What to Look for in a Kit
A complete timing chain kit should include more than just the chain. Ensure the kit you buy contains the main timing chain, balance shaft chain, all tensioners, guides, sprockets, and any necessary seals or gaskets. Some comprehensive kits also include new camshaft phasers (VVT actuators). Given the labor involved, it's wise to replace all related components at once to avoid having to do the job again.
Cost of Replacing a Buick Regal Timing Chain Kit
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Timing Chain Kit | $87 - $387 |
| Shop Labor | $561 - $823 |
| Total Estimated Cost | $648 - $1,210 |
Note: Prices are estimates and can vary based on your location, the specific parts chosen, and the repair shop's labor rates. This job is labor-intensive.
Frequently Asked Questions
Are there any recalls for the Buick Regal timing chain?
There are no direct recalls for the timing chain itself. However, GM issued a Special Coverage Adjustment (No. 12313C) for the 2011 Regal with the 2.4L engine, extending the warranty for the engine balance chain to 10 years or 120,000 miles due to a known issue with chain stretching. This has likely expired for most vehicles. Always check for any open recalls or service bulletins for your specific VIN.
What causes the timing chain to fail on these engines?
Several factors contribute to failure. Low oil levels or using the wrong type of oil can accelerate wear on the chain and guides. The original tensioners and plastic guides were known weak points. Additionally, issues with the high-pressure fuel pump seal on direct-injection models could sometimes lead to fuel diluting the engine oil, reducing its lubricating properties and causing premature wear.
Can I replace the timing chain kit myself?
This is an advanced repair. It requires significant disassembly of the engine's front end, special tools like a harmonic balancer puller, and precise knowledge of setting the engine timing. For most DIY mechanics, this job is too complex. An error during installation can lead to severe engine damage. It is highly recommended to have this repair performed by a professional mechanic.
🎬 See a professional walkthrough of the timing chain replacement processShould I replace the water pump at the same time? 🎬 Watch: How to replace the Ecotec water pump the easier way
Yes. The water pump on the Ecotec engine is driven by the balance shaft chain. Since the timing cover and chains must be removed to access it, replacing the water pump at the same time is highly recommended. This saves you from paying for the same significant labor cost in the near future if the water pump were to fail.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12635447 12645237
The timing system in these engines consists of a primary timing chain for the camshafts and a secondary chain for the balance shafts. Both are common failure points. The engines are interference designs, meaning piston-to-valve contact will occur if the chain breaks.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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