2016 Ford Explorer 3.5 Cylinder Numbers – Locate Every Cylinder
To identify the 2016 Ford Explorer 3.5 cylinder numbers, you must look at the engine’s transverse layout. Bank 1 (cylinders 1, 2, and 3) is located at the rear of the engine bay near the firewall, while Bank 2 (cylinders 4, 5, and 6) faces the front radiator. This guide provides the exact mapping, firing order, and professional tips for accessing these components during maintenance.
If you have ever felt your Ford Explorer shudder at a stoplight or noticed the dreaded check engine light flashing, you know the frustration of a misfiring engine. Identifying the 2016 ford explorer 3.5 cylinder numbers is the first step toward diagnosing whether you have a bad ignition coil, a fouled spark plug, or a more serious fuel injector issue.
Most DIYers get stuck because the V6 engine in the Explorer is mounted sideways, or “transversely,” making the rear bank difficult to see. We promise to clarify exactly which cylinder is which, saving you hours of guesswork and preventing you from pulling the wrong parts.
In this guide, we will break down the cylinder numbering for both the naturally aspirated Ti-VCT and the twin-turbo EcoBoost 3.5L engines. We will also cover the firing order, the tools you need for the job, and how to safely reach the cylinders hidden under the intake manifold.
Understanding the Transverse V6 Layout
The 2016 Ford Explorer utilizes a front-wheel-drive based architecture, even in its Intelligent 4WD configurations. This means the 3.5L Duratec or EcoBoost engine sits sideways between the fender wells rather than pointing front-to-back like a traditional truck engine.
When you pop the hood, you are looking at the side of the engine, not the front. The “front” of the engine, where the serpentine belt and pulleys are located, is actually on the passenger side of the vehicle. This orientation dictates how the cylinders are numbered.
Because of this layout, the engine is divided into two “banks.” Bank 1 is the half of the “V” that sits closest to the passenger cabin (the firewall). Bank 2 is the half that sits closest to the radiator and front bumper. Knowing this distinction is vital for interpreting OBD-II scan codes like P0301 or P0304.
Mapping the 2016 ford explorer 3.5 cylinder numbers
To accurately identify the 2016 ford explorer 3.5 cylinder numbers, you should stand at the front bumper and look toward the windshield. The cylinders are numbered from the “front” of the engine (passenger side) to the “back” of the engine (driver side) across both banks.
On the rear bank (Bank 1), which is tucked under the upper intake manifold, the cylinders are numbered 1, 2, and 3. Cylinder 1 is the furthest to the right (passenger side), Cylinder 2 is in the middle, and Cylinder 3 is on the left (driver side).
On the front bank (Bank 2), which is easily accessible right behind the radiator, the cylinders are numbered 4, 5, and 6. Cylinder 4 is on the passenger side, Cylinder 5 is in the center, and Cylinder 6 is on the driver side. This “zigzag” or “staggered” numbering is standard for Ford’s Cyclone engine family.
The 3.5L Firing Order
While the physical location of the cylinders is fixed, the firing order determines the sequence in which the spark plugs ignite. For the 2016 Ford Explorer 3.5L engine, the firing order is 1-4-2-5-3-6.
Understanding the firing order is helpful if you are diagnosing a vibration or “rhythm” issue. If you have multiple misfires, they often follow this sequence. For most modern repairs involving coil-on-plug (COP) systems, however, the physical cylinder number is your most important piece of data.
EcoBoost vs. Naturally Aspirated Layout
Whether your Explorer has the standard 3.5L Ti-VCT engine or the high-output 3.5L EcoBoost twin-turbo, the cylinder numbering remains identical. The main difference lies in the plumbing and components surrounding the cylinders.
The EcoBoost engine features turbocharger piping, intercooler hoses, and a slightly different intake design. However, Cylinder 1 will always be at the back-right, and Cylinder 4 will always be at the front-right. Do not let the extra plastic covers or turbo hoses confuse your mapping.
Tools Required for Cylinder Access
Accessing the 2016 ford explorer 3.5 cylinder numbers—specifically the ones in the back—requires more than just a basic wrench. If you plan to change the spark plugs or ignition coils, you need to prepare your toolbox in advance.
- 5/8″ Spark Plug Socket: Ensure it has a rubber insert or a magnet to hold the plug securely.
- 10mm Socket: This is used to remove the bolts holding the ignition coils in place.
- 8mm Socket: Necessary for various intake manifold bolts and vacuum line brackets.
- Swivel Extensions: A 6-inch and 3-inch extension with a universal joint will help you reach the awkward angles on Bank 1.
- Torque Wrench: Essential for tightening spark plugs to the manufacturer’s specification (usually around 11-13 lb-ft).
I also recommend having a telescoping magnet on hand. It is very easy to drop a 10mm bolt into the depths of the engine bay when working on the rear bank, and a magnet will save your afternoon.
The Challenge of Bank 1 (Cylinders 1, 2, and 3)
If your diagnostic tool points to a problem with the 2016 ford explorer 3.5 cylinder numbers 1, 2, or 3, you are in for a bit more work. These cylinders are located under the plastic intake plenum.
To reach them, you must remove the air intake tube and several vacuum lines. You then have to unbolt the upper intake manifold itself. This might sound intimidating, but it is a standard procedure for this engine and can be done by a patient DIYer in about an hour.
Always remember to stuff clean shop rags into the open intake ports once the manifold is removed. If a bolt or debris falls into the engine through these ports, it can cause catastrophic internal engine damage when you try to start the car later.
Replacing the Intake Gaskets
When you pull the manifold to reach the rear cylinders, you should always replace the upper intake manifold gaskets. These rubber seals become flattened and brittle over time due to engine heat.
Reusing old gaskets often leads to vacuum leaks, which cause a rough idle and lean-running codes (P0171/P0174). New gaskets are inexpensive and provide peace of mind that the job is done right the first time.
Common Diagnostic Codes Explained
When your car’s computer detects a problem with one of the 2016 ford explorer 3.5 cylinder numbers, it stores a specific Diagnostic Trouble Code (DTC). These codes tell you exactly where to look.
- P0301: Misfire detected in Cylinder 1 (Rear bank, passenger side).
- P0302: Misfire detected in Cylinder 2 (Rear bank, center).
- P0303: Misfire detected in Cylinder 3 (Rear bank, driver side).
- P0304: Misfire detected in Cylinder 4 (Front bank, passenger side).
- P0305: Misfire detected in Cylinder 5 (Front bank, center).
- P0306: Misfire detected in Cylinder 6 (Front bank, driver side).
If you see a P0300 code, it means the misfire is “random” or “multiple.” This usually suggests a problem that affects all cylinders, such as a fuel pump issue, a large vacuum leak, or a failing crankshaft position sensor.
Pro Tips for Ignition System Maintenance
As an experienced technician, I have seen many DIYers make small mistakes that lead to big headaches. When you are working with the 2016 ford explorer 3.5 cylinder numbers and their respective coils, follow these “pro” insights.
First, always apply a small amount of dielectric grease to the inside of the ignition coil boot. This prevents the rubber from sticking to the spark plug porcelain and helps seal out moisture. It also makes future removal much easier.
Second, if you are replacing one ignition coil on the rear bank, consider replacing all three (1, 2, and 3). Since you have already gone through the labor of removing the intake manifold, it is cost-effective to replace the other two “hidden” coils to prevent having to do the job again in six months.
Finally, check the condition of the pigtail connectors. The plastic clips on Ford wiring harnesses are notorious for becoming brittle. If the clip breaks, the connector might vibrate loose, causing an intermittent misfire that is very difficult to track down.
Safety Considerations for DIY Mechanics
Working on a 2016 Ford Explorer requires a safety-first mindset. Never attempt to remove spark plugs or ignition coils while the engine is hot. Aluminum cylinder heads are prone to thread damage if you try to remove or install plugs while the metal is expanded from heat.
Wait at least two to three hours after driving before starting your work. Additionally, always disconnect the negative battery terminal. This prevents accidental shorts and ensures that the electric cooling fans don’t kick on unexpectedly while your hands are near the radiator.
If you encounter a spark plug that feels extremely tight, do not force it. Apply a bit of penetrating oil, let it sit for twenty minutes, and then try to work it back and forth gently. Snapping a spark plug off in the cylinder head is a “call a professional” moment that will significantly increase your repair bill.
Frequently Asked Questions About 2016 ford explorer 3.5 cylinder numbers
Which cylinder is #1 on a 2016 Ford Explorer 3.5L?
Cylinder #1 is located on the passenger side of the engine bay, on the bank closest to the firewall (the rear bank). If you are standing at the front of the car, it is the cylinder furthest to the back and right.
Do I have to remove the intake manifold to change all the spark plugs?
Yes, on the 3.5L V6 engine, the upper intake manifold (plenum) completely blocks access to cylinders 1, 2, and 3. While you can change the front three plugs easily, the rear three require manifold removal.
What is the firing order for the 2016 Ford Explorer 3.5?
The firing order is 1-4-2-5-3-6. This sequence is used by the Engine Control Module (ECM) to time the spark and fuel injection for smooth operation and balanced engine harmonics.
Is the cylinder numbering the same for the EcoBoost engine?
Yes, the 2016 ford explorer 3.5 cylinder numbers are identical for both the standard 3.5L Ti-VCT and the 3.5L EcoBoost engines. The physical block layout and numbering system do not change between these two models.
How can I tell if a specific cylinder is misfiring?
The best way is to use an OBD-II scanner. A code ranging from P0301 to P0306 will indicate exactly which cylinder is experiencing a misfire. You can also perform a “power balance test” if you have a high-end diagnostic tool.
Final Thoughts on Your Explorer Maintenance
Mastering the layout of your engine is a rite of passage for any DIY mechanic. By understanding the 2016 ford explorer 3.5 cylinder numbers, you have given yourself the power to perform professional-grade diagnostics and repairs right in your own driveway.
Remember to take your time, especially when dealing with the hidden rear bank. Use the right tools, replace your gaskets, and always prioritize safety by working on a cool engine. Whether you are prepping for a long road trip or just keeping your daily driver in top shape, knowing your engine inside and out is the best way to ensure reliability.
Stay safe, keep your hands clean, and enjoy the satisfaction of a job well done. Your Explorer is a robust machine, and with a little bit of patience and this guide, you can keep it running smoothly for many miles to come!
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