A Guide to the 2012-2017 Buick Verano Engine Timing Chain Kit
Understanding the common timing chain issues in your Verano's 2.4L Ecotec engine and how to fix them.
- Timing chain issues are a known problem for the 2.4L Ecotec engine in the 2012-2017 Verano.
- Do not ignore a rattling engine noise; it's a critical warning sign of a failing timing chain that can lead to catastrophic engine failure.
- This is a complex, labor-intensive repair not recommended for DIY beginners; expect labor to be a significant part of the total cost.
- When replacing the timing chain, also consider replacing the VVT solenoids, water pump, and related gaskets for long-term reliability.
Is Your Buick Verano Making a Rattling Noise?
If you own a 2012-2017 Buick Verano, especially one with the 2.4L Ecotec engine, you might eventually hear a rattling or clattering sound coming from the engine bay. This noise is often most noticeable during a cold start and is a classic symptom of a worn timing chain system. These engines are known for issues related to stretched timing chains, failing tensioners, and broken plastic chain guides. Because this is an interference engine, where the valves and pistons occupy the same space at different times, a failed timing chain can lead to catastrophic engine damage. Addressing the warning signs early is crucial.
Warning Signs of a Failing Timing Chain
- Engine Rattle: A metallic rattling or clattering noise, especially when starting the engine cold.
- Check Engine Light: The light may illuminate with timing-related codes like P0016, P0011, or P0014.
- Poor Engine Performance: You may experience rough idling, engine hesitation, misfires, or a noticeable loss of power.
- Trouble Starting: A stretched chain can make the engine difficult to start.
- Metal Shavings in Oil: During an oil change, you might find small metal particles in the drained oil or filter, which can come from the wearing chain and guides.
Known Issues for the 2012-2017 Buick Verano
While there are no specific NHTSA recalls for the timing chain on the 2012-2017 Verano, General Motors has issued special coverage adjustments for other vehicles using the same 2.4L engine for stretched timing chains. This indicates it is a recognized issue with the engine family. Technical Service Bulletin (TSB) 14882 also addresses a plugged PCV orifice in the intake manifold on these engines, which can impact engine health and oil consumption. High oil consumption is another known issue that can contribute to premature timing chain wear if the oil level gets too low.
Choosing the Right Aftermarket Timing Kit
When replacing the timing chain, you have a choice between OEM (Original Equipment Manufacturer) parts like AC Delco and several quality aftermarket brands. For this specific repair, a high-quality aftermarket kit can offer excellent value and reliability.
| Brand Tier | Brands | Quality & Notes |
|---|---|---|
| Premium Aftermarket / OE Supplier | Cloyes, INA | Cloyes is a highly regarded brand in timing systems, known for engineering kits that meet or exceed OEM specifications and are sometimes the original supplier to GM. Their kits are comprehensive and a trusted choice for this repair. INA is a major OEM supplier for many automakers and is known for high-quality components. |
| Quality Aftermarket | Gates, Dayco | Gates and Dayco are well-known brands in the automotive aftermarket. While famous for belts, they also produce reliable timing component kits that offer a good balance of quality and price. |
| OEM | AC Delco | AC Delco is the official GM parts brand. These kits will restore the vehicle to its original factory condition. They are a reliable, but often more expensive, option. |
Pro Tip: What to Replace with the Timing Kit
Since replacing the timing chain is a labor-intensive job, it's smart to replace other accessible components at the same time. Consider replacing the water pump (if it's driven by the timing chain), VVT solenoids (a common failure point), the crankshaft front seal, and the valve cover gasket. Some kits include the water pump.
Frequently Asked Questions
Can I drive my Verano with a rattling timing chain?
It is not recommended. A rattling noise indicates the timing system is already failing. Continuing to drive risks the chain skipping a tooth or breaking entirely, which can cause severe and expensive engine damage. You should have the vehicle inspected by a mechanic as soon as possible.
What does a timing chain replacement cost for a Buick Verano?
The total cost can vary, but you can expect to pay between $1,132 and $1,417. Labor makes up a significant portion of this, estimated between $586 and $859, while parts can range from under $100 to over $500 depending on the brand and completeness of the kit.
Is this a DIY job?
For most home mechanics, this is not a recommended DIY project. The replacement is a complex and labor-intensive process that requires removing many engine components and special tools to ensure the engine is timed correctly. Incorrect installation can lead to immediate engine damage.
What is a VVT actuator and why is it in the kit?
VVT stands for Variable Valve Timing. The VVT actuators (also called phasers) are gears on the camshafts that can change the timing of the valves to improve engine performance and efficiency. They are controlled by oil pressure via VVT solenoids. Since they are a key part of the timing system and can also fail, comprehensive kits include them for a complete repair.
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Technical Specifications
OEM Part Numbers: 12680750 12635427 12649233 24435052 12609291
This vehicle uses the 2.4L Ecotec (codes LEA, LAF, LUK) or 2.0L Turbo Ecotec (code LHU) engine. Both are interference engines with dual overhead camshafts (DOHC) and variable valve timing (VVT). The timing system consists of primary and secondary (balance shaft) chains, guides, and tensioners.
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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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