Guide to the 2016-2020 Chevrolet Impala Timing Chain Kit
Understanding timing chain issues in your Impala's 2.5L or 3.6L engine and how to choose the right replacement kit.
- The 3.6L V6 engine has a known history of timing chain stretch; using high-quality full-synthetic oil and changing it on schedule is critical for prevention.
- Do not ignore a rattling noise on startup or a Check Engine Light with codes like P0008 or P0017, as these are early warnings.
- Always replace timing components as a complete kit, including chains, guides, and tensioners, to ensure a lasting repair.
- Due to the high labor cost, it is wise to also replace the water pump (on 3.6L V6 models) during this service to save on future repairs.
Is My Impala's Timing Chain Failing?
A failing timing chain should not be ignored. For the 2016-2020 Chevrolet Impala, particularly models with the 3.6L V6 engine, timing chain stretch is a known issue that can be accelerated by factors like infrequent oil changes. Keeping an ear out for specific warning signs is key to catching the problem early.
🎬 Watch: Hear what a failing timing chain sounds like at startup.Choosing the Right Aftermarket Timing Kit
When replacing a critical component like the timing chain, the quality of the parts matters. You will generally find two tiers of aftermarket options:
- Premium Brands (e.g., ACDelco): ACDelco is General Motors' own parts brand, so their kits are considered the original equipment (OE) equivalent. They are manufactured to strict standards for fit and durability, offering the most reliable, long-term solution. Choosing a premium brand ensures you are getting parts engineered specifically for your Impala's engine.
- Value Brands (e.g., Replacement): These kits are a more budget-friendly option. While they are more affordable, the quality can vary. For a component this critical and labor-intensive to replace, a value-brand kit may have a shorter lifespan, potentially leading to the same repair job again sooner than expected.
Pro Tip: Replace the Whole Kit
Never replace just one part of the timing system, like a single chain or tensioner. The components are designed to wear together. A full kit replacement ensures all parts are new and have the same expected lifespan, preventing a repeat failure of an old component.
Known Issues and Technical Service Bulletins (TSBs)
The GM 3.6L V6 engine has a documented history of premature timing chain wear. While many TSBs and special coverage programs targeted earlier model years, the issue can still arise. A notable TSB for the 2020 Impala (20-NA-085) points to a missing timing chain guide insert on some engines, which can cause the chain to become loose and trigger codes like P0018 and P0019. 🎬 See how to professionally test for timing chain stretch and codes. For the 2.5L engine, TSB PIP5803A notes that technicians may find a loose timing chain guide bolt during other repairs, which requires replacement of the guide and bolts.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Kit | $211.74 - $375.29 |
| New OEM Kit (ACDelco) | $350 - $600+ |
| Shop Labor | $1,300 - $1,900+ |
| Total Estimated Job | $1,600 - $2,700+ |
Costs are estimates and can vary based on your location, the specific engine in your Impala, and the repair shop's labor rates.
Frequently Asked Questions
Is there a recall on the timing chain for the 2016-2020 Impala?
No, there are no active NHTSA safety recalls for the timing chain on the 2016-2020 Chevrolet Impala. However, GM has issued several Technical Service Bulletins (TSBs) related to the timing system for various engines and model years.
Should I replace the water pump at the same time?
Yes, it is highly recommended. On the 3.6L V6, the water pump is located behind the timing cover. Since the majority of the replacement cost is the labor to access this area, replacing the water pump at the same time is a smart preventative measure that can save you from another expensive repair down the road.
How important are oil changes for timing chain health?
Extremely important. The timing chain tensioners are hydraulically operated by engine oil pressure. Infrequent oil changes or using the wrong type of oil can lead to sludge buildup, starving the tensioners and chain of proper lubrication and causing premature wear and stretching.
Is this a DIY-friendly job?
No, this is not recommended for beginners. Replacing the timing chain is a complex and labor-intensive job that requires specialized tools, a deep understanding of engine mechanics, and the ability to properly time the engine. Mistakes can lead to catastrophic engine damage. This job is best left to experienced professional mechanics.
🎬 Watch this full-length walkthrough of the complex removal and installation process.Helpful Videos
Technical Specifications
OEM Part Numbers: 12680750
Kits typically include primary and secondary timing chains, tensioners, guides, and sometimes sprockets or VVT components. Both 2.5L I4 and 3.6L V6 engines use timing chains, not belts.
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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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