Ford Explorer 1991-1995 Engine Valve Lifter Guide and Known Issues
Dealing with that engine tick? Here's what you need to know about replacing the valve lifters on your first-generation Explorer.
- A ticking noise from your 1991-1995 Explorer's 4.0L V6 is a very common sign of a failing valve lifter.
- Always replace lifters as a complete set of 12; if one is bad, the others are likely worn as well.
- Aftermarket brands like Melling and Sealed Power are reliable, quality replacements for this vehicle.
- This is a labor-intensive repair; while the parts are affordable, shop labor will be the largest part of the cost.
Is My Explorer's Engine Ticking a Lifter Problem?
A ticking or tapping noise from the engine, especially when it's cold, is a common complaint for the 4.0L Cologne V6 engine used in 1991-1995 Ford Explorers. This noise often points directly to a problem with the hydraulic valve lifters. The sound may be most noticeable at idle and can sometimes get quieter as the engine warms up and oil pressure builds. However, the noise can also be caused by worn rocker arms 🎬 See this guide on inspecting and replacing worn rocker arms. or even an exhaust leak, so it's important to diagnose it correctly. A lifter tick that gets faster as you increase engine RPM is a classic sign that the lifters are the source of the noise.
🎬 Watch: How to tell if it's a lifter tick or rod knock.Don't Ignore the Noise
While you can often drive with a ticking lifter for a while, it's not a good idea to ignore it. A collapsed or failing lifter isn't properly cushioning the valvetrain, which can lead to accelerated wear on other expensive parts, like the camshaft. In a worst-case scenario, a lifter can fail completely and cause significant engine damage.
Choosing the Right Aftermarket Lifters: Melling vs. Sealed Power
For this generation of Explorer, the original OEM parts are long discontinued. Thankfully, the aftermarket provides quality replacements. The two most common brands you'll find are Melling and Sealed Power. Both are well-established American manufacturers with a reputation for producing reliable engine components that meet or exceed original specifications.
- Melling: Often considered a premium aftermarket brand, Melling is well-respected for its oil pumps and valvetrain components. They are a solid choice for a stock replacement.
- Sealed Power: A brand under Federal-Mogul, Sealed Power offers a wide range of engine parts known for quality and durability. Their lifters are a dependable, cost-effective option for restoring your engine's quiet operation.
Pro Tip: For the 4.0L OHV engine, both Melling and Sealed Power are excellent choices. Since their quality is comparable for this application, choosing based on price or availability is a safe bet. It is highly recommended to replace all 12 lifters at the same time, even if only one is making noise. This ensures even wear and prevents you from having to do the job again in a few months when another old lifter fails.
Known Issues, Recalls, and Service Bulletins
Searches for official recalls and Technical Service Bulletins (TSBs) on the NHTSA database for the 1991-1995 Ford Explorer's valve lifters came up empty. The common ticking noise is a known characteristic of the 4.0L Cologne V6 engine family as it ages, often related to oil condition, wear, or sludge buildup. Keeping up with regular oil changes using the recommended 5W-30 oil is critical for lifter health.
Estimated Replacement Costs
Replacing valve lifters is a labor-intensive job. While the parts themselves are not extremely expensive, accessing them requires significant disassembly of the top part of the engine.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Lifter Set (12) | $77 - $150 |
| Shop Labor | $950 - $2,900 |
| Total Professional Replacement | $1,000 - $3,000+ |
Frequently Asked Questions
Do I have to replace the camshaft with the lifters?
It is a best practice, especially on a high-mileage engine. A worn lifter can damage the surface of the camshaft lobe it rides on. Installing a new lifter on a damaged cam lobe will cause the new lifter to fail prematurely. If you're already paying for the labor to get to the lifters, inspecting the camshaft and replacing it if necessary is a wise move.
Can I replace just the one bad lifter?
While you technically can, it's not recommended. The labor to replace one lifter is the same as replacing all of them. If one has failed due to age and wear, the others are likely not far behind. Replacing them all at once saves you from a repeat repair down the road.
Can a simple oil change fix a noisy lifter?
Sometimes, yes. If the ticking is caused by a bit of sludge or a lifter that is slow to pump up, a fresh oil change with the correct viscosity oil (5W-30 for the 4.0L) and a quality filter can sometimes quiet it down. Some owners also have success with engine oil additives designed to clean and free sticky lifters, but this is often a temporary fix for a worn-out part.
Is this a DIY-friendly job?
For the average home mechanic, this is a difficult job. Replacing the lifters on the 4.0L OHV engine requires removing the valve covers, intake manifold, and rocker arms to access the lifters. It requires care, cleanliness, and specific tools. For most owners, this job is best left to a professional mechanic.
🎬 Watch: A full teardown and inspection of the 4.0L top end.Helpful Videos
Technical Specifications
Engine: Ford 4.0L Cologne V6 (OHV), Lifter Type: Hydraulic Roller, Quantity per engine: 12
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.
- Ford Explorer: