Engine Timing Set Replacement Guide for the 2011-2017 Buick Regal
Addressing the common timing chain issues in the 2.0L and 2.4L Ecotec engines.
- A rattling noise on startup is a critical warning sign of timing chain failure; do not ignore it.
- This is a known issue for both the 2.4L and 2.0L Ecotec engines in this Regal generation.
- When replacing, use a complete kit from a quality aftermarket brand like INA or Melling for potentially improved durability.
- Driving with a failing timing chain can lead to catastrophic engine damage, so the vehicle should not be driven.
A Notorious Issue for Regal Owners
If you own a 2011-2017 Buick Regal with a 2.0L Turbo or 2.4L Ecotec engine, you should be aware of well-documented timing chain problems. These engines are known for issues like stretched timing chains, failing plastic guides, and faulty tensioners. These are not isolated incidents but a common point of failure for many GM vehicles using these engines. Often, the problem starts not with the chain itself, but with the supporting parts. The plastic guides can become brittle and break, or the tensioner can fail to keep 🎬 See what a failed tensioner looks like on this engine. the chain tight.
Don't Ignore the Rattle
The most common warning sign is a distinct rattling or slapping noise from the engine, especially during a cold start. This sound is the loose chain hitting the inside of the timing cover. 🎬 Watch a video showing a typical timing chain failure. Because the Ecotec is an interference engine, ignoring this symptom can lead to the chain jumping time or breaking completely. If this happens, the pistons will collide with the valves, causing catastrophic and expensive engine damage.
OEM vs. Aftermarket Timing Sets
When replacing your timing set, you have a choice between Original Equipment Manufacturer (OEM) and aftermarket parts. While OEM is a direct replacement, the original components are the ones prone to failure. Many reputable aftermarket brands have re-engineered their kits to be more durable. For instance, some kits use stronger guide materials than the original plastic. For this specific repair, a high-quality aftermarket kit can be a superior choice, potentially offering a more robust and lasting solution.
Choosing the Right Aftermarket Brand
When shopping for an aftermarket kit, it's crucial to select a reputable brand. Always opt for a complete kit that includes the chains, sprockets, guides, and tensioners. Given the significant labor involved, replacing every component at once is the smart move.
- INA: A well-respected brand that is an OEM supplier for many European automakers. They are known for high-quality bearings and tensioners.
- Melling: A trusted American brand known for making quality engine components, including timing sets. Many professionals consider their parts to be a reliable choice.
Pro Tip: While the timing cover is off, it is highly recommended to also replace the water pump. Many kits are available that include the water pump for a comprehensive service.
Estimated Replacement Costs
The cost of replacing a timing set is primarily driven by labor, as it is a complex job. Prices can vary based on your location and the specific parts you choose.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Kit | $500 - $600 |
| New Aftermarket Kit | $215 - $590 |
| Shop Labor | $561 - $823 |
| Total Estimated Cost | $776 - $1413 |
Frequently Asked Questions (FAQ)
Are there any recalls for the Regal's timing chain?
There are no open safety recalls for the main timing chain. However, GM did issue Special Coverage Adjustment #12313C for the 2011 Regal with the 2.4L engine, which extended the warranty on the engine balance chain due to premature stretching. This coverage was for 10 years or 120,000 miles and has likely expired for most vehicles. Always check with a dealer for any bulletins related to your specific VIN.
What causes the timing chain to fail on these engines?
Failures are often linked to a few key issues: stretched chains from normal wear, brittle plastic guides that crack and break, and faulty hydraulic tensioners that lose pressure. Low oil levels or extending oil change intervals can accelerate wear significantly. Additionally, TSB 13-06-01-003F notes that issues with excessive oil consumption on some 2.4L models could be related to piston rings, which can indirectly affect engine health and timing components.
Can I just replace the broken part, like the tensioner?
This is not recommended. The labor to access the timing components is extensive. If one part has failed, it's very likely that the other parts (chain, guides) are also worn. Replacing the entire kit at once ensures the longevity of the repair and prevents you from having to do the same labor-intensive job again in the near future.
What are the main symptoms again?
The most common symptoms are a rattling noise from the engine on startup, a check engine light with codes like P0016 or P0017, rough idling, and poor engine performance or reduced power.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12680750 12635447 12645237 12649233
Kits should include the primary timing chain (148 links), balance shaft chain (134 links), all tensioners, fixed and pivoting guides, and crankshaft/camshaft sprockets. Some comprehensive kits also include VVT actuators (phasers).
We Have This Part in Stock
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.
- Buick Regal: