Diagnosing and Replacing Engine Valve Lifters in a 2016-2024 Lincoln Navigator
A persistent ticking from your Navigator's engine could be a worn valve lifter, a repair that demands careful diagnosis.
- First, confirm the noise is not the more common VCT cam phaser rattle covered by TSB 23-2143.
- Valve lifter replacement is a labor-intensive job; it is highly recommended to replace all 24 lifters at once.
- Using the correct specification of high-quality synthetic oil and maintaining regular change intervals is the best way to prevent lifter failure.
- Melling and Sealed Power are trusted aftermarket brands for this repair, offering a quality alternative to more expensive OEM parts.
Is It Your Lifters or Cam Phasers?
STOP: A ticking or rattling noise on your 3.5L EcoBoost is most often NOT a valve lifter. A very common issue on 2018-2020 Navigators is a brief (2-5 second) rattle on a cold start. This is typically caused by worn Variable Camshaft Timing (VCT) units, also called cam phasers. Ford issued Technical Service Bulletin (TSB) 23-2143 for this exact problem. If the noise is a short rattle when the engine is cold and then goes away, you are likely dealing with VCT phasers, not valve lifters. A true lifter tick is usually more persistent.
Symptoms of a Bad Valve Lifter
A failing valve lifter in your Navigator will usually make a distinct noise. Unlike the cold-start rattle of a cam phaser, a bad lifter often produces a constant, rhythmic ticking or tapping sound that is audible at idle. The sound comes from the top of the engine and its speed increases with engine RPM. This happens when a lifter can no longer hold oil pressure, creating a small gap in the valvetrain that produces the noise. In severe cases, a completely failed lifter can lead to a rough running engine, misfires, and an illuminated Check Engine Light.
Choosing the Right Aftermarket Lifter
When replacing valve lifters, quality is critical. This is a labor-intensive job, and you don't want to do it twice. The brands available—INA, Melling, and Sealed Power—are all reputable aftermarket manufacturers. You can think of them in tiers of market reputation for this specific type of part.
- Good (Sealed Power): Sealed Power is a brand under Federal-Mogul, a massive OEM and aftermarket supplier. Their parts are known to be reliable, quality replacements that meet or exceed original specifications.
- Better (Melling): Melling is a highly respected American company specializing in oil pumps and valvetrain components. They have a strong reputation among mechanics for producing durable, high-quality engine parts, making them an excellent choice for a critical component like a lifter.
- Best/OEM-Equivalent (INA): INA is a global OEM supplier for many major automakers, including Ford. Choosing INA often means you are getting a part made by the same company that manufactured the original component.
Pro Tip: Your Navigator's 3.5L V6 engine has 24 valve lifters. While it is possible to replace only the one that has failed, the high labor cost makes it wise to replace all 24 at the same time. If one has failed due to age or oil contamination, others are likely to fail soon.
Cost to Replace Lincoln Navigator Valve Lifters
| Part Category | Price Range (Per Lifter) | Price Range (Full Set of 24) |
|---|---|---|
| New Aftermarket | $6.56 - $24.05 | $157 - $577 |
| New OEM (Ford/Motorcraft) | $25 - $40 | $600 - $960 |
| Shop Labor | $1500 - $2200+ | |
*Cost estimates are approximate and can vary based on location, vehicle condition, and the specific shop. The primary cost of this repair is labor.
Frequently Asked Questions
Can I replace just one bad lifter?
While you can, it is not recommended. The repair requires extensive labor to access the lifters. If one has failed, it's likely the others have experienced similar wear. Replacing all 24 lifters at once is the safest and most cost-effective approach in the long run to avoid another expensive repair job.
What causes valve lifters to fail?
The most common cause of lifter failure is contaminated or low-quality engine oil. Infrequent oil changes or using oil that doesn't meet Ford's specifications can lead to sludge and block the tiny oil passages in the lifter, causing it to collapse and create noise. Age and high mileage are also contributing factors.
Is a ticking engine noise always a bad lifter?
No. On the 2016-2024 Lincoln Navigator, a ticking or rattling noise is often caused by the VCT cam phasers, especially if it only happens on cold starts. Other potential causes include exhaust manifold leaks, issues with the high-pressure fuel pump, or low oil pressure. Proper diagnosis is essential before beginning repairs.
How difficult is it to replace valve lifters on a Navigator?
This is a very difficult and complex job, rated 5 out of 5 in difficulty. It requires the removal of the valve covers, high-pressure fuel pump, timing chains, and camshafts. This repair should only be performed by an experienced professional mechanic with the correct tools.
Technical Specifications
OEM Part Numbers: BR3Z-6500-A BR3E-6C501-AA
The 3.5L EcoBoost V6 engine uses 24 hydraulic roller lash adjusters (valve lifters).
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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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