2016 Ford Explorer Exhaust System – Troubleshooting Carbon Monoxide
The 2016 Ford Explorer exhaust system is a critical network of pipes and filters designed to manage engine heat, reduce noise, and scrub harmful emissions before they reach the atmosphere. This guide provides a deep dive into diagnosing common leaks, understanding the infamous cabin odor issues, and choosing the right replacement parts for your SUV.
Whether you are a weekend DIYer or an off-road enthusiast, maintaining your exhaust is vital for both vehicle health and passenger safety. You rely on your Ford Explorer to haul your family and gear through city streets and rugged trails alike. However, a failing exhaust can lead to decreased fuel economy, loud rattling, or even dangerous fumes entering the cabin.
In this article, we will break down the components of the 2016 ford explorer exhaust system to help you identify problems before they become expensive repairs. We promise to provide actionable steps for inspection and maintenance, ensuring your vehicle remains quiet and efficient. We will preview the most common failure points, such as cracked manifolds and leaking flex pipes, while offering pro-level tips for the home mechanic.
Understanding the Layout of Your 2016 Ford Explorer Exhaust System
The 2016 ford explorer exhaust system is designed differently depending on which engine sits under your hood. Whether you have the 2.3L EcoBoost, the 3.5L Ti-VCT V6, or the powerful 3.5L EcoBoost, the general flow remains similar. It all starts at the exhaust manifold, which collects gases directly from the engine cylinders.
From the manifold, gases travel through the downpipe and into the catalytic converters. These components are essential for converting toxic gases like carbon monoxide into less harmful substances. Because the 2016 model year often sees heavy use, these converters can eventually become clogged or “poisoned,” leading to a noticeable loss in power.
Following the converters, the system utilizes flex pipes. These braided steel sections allow the exhaust to move slightly as the engine torques, preventing the rigid pipes from snapping. Finally, the gases pass through the resonator and the muffler to dampen the sound before exiting the tailpipe. Understanding this flow helps you pinpoint exactly where a leak or rattle might be originating.
The Role of Oxygen Sensors
Your Explorer uses multiple oxygen (O2) sensors to monitor the efficiency of the 2016 ford explorer exhaust system. One set of sensors sits before the catalytic converter to help the computer adjust the air-fuel ratio. The second set sits after the converter to ensure it is doing its job correctly.
If you see a Check Engine Light with codes like P0420 or P0430, your exhaust system is likely the culprit. Replacing a sensor is often a simple DIY task, but it requires a specialized O2 sensor socket to avoid stripping the threads. Always apply a small amount of anti-seize to the new sensor’s threads to make future removals easier.
Common Problems with the 2016 Ford Explorer Exhaust System
One of the most documented issues with this specific vehicle is the presence of exhaust fumes inside the cabin. Many owners have reported a distinct “rotten egg” or sulfur smell, especially during heavy acceleration. This is often linked to the 2016 ford explorer exhaust system and how it interacts with the vehicle’s body seals.
While Ford issued several Technical Service Bulletins (TSBs) regarding this, the root cause is often a combination of unsealed body seams and exhaust leaks. If the rear air extractors or liftgate seals are compromised, the low pressure created behind the moving vehicle can actually suck exhaust gases back into the interior. This is a significant safety concern that requires immediate attention.
Another frequent headache for Explorer owners is a cracked exhaust manifold, particularly on the 3.5L engines. These cracks often manifest as a loud “ticking” sound when the engine is cold. As the metal heats up and expands, the crack may temporarily close, making the sound disappear. However, this leak can reduce turbo efficiency on EcoBoost models and lead to poor fuel trim readings.
Flex Pipe Failures
The flex pipes on the 2016 ford explorer exhaust system are prone to fraying and leaking over time. Because they are located underneath the vehicle, they are constantly exposed to road salt, water, and debris. A failing flex pipe will usually create a hissing or loud buzzing sound under the front floorboards.
If you ignore a leaking flex pipe, the extra vibration can cause the exhaust hangers to fail or put undue stress on the manifold bolts. Replacing a flex pipe often requires cutting and welding, but many aftermarket manufacturers offer bolt-on assemblies for the 2016 Explorer. This makes the repair much more manageable for a DIYer with a standard set of wrenches.
How to Inspect Your 2016 Ford Explorer Exhaust System
A thorough inspection is the first step in any successful repair. Start by safely elevating your vehicle using a floor jack and heavy-duty jack stands. Never work under a vehicle supported only by a jack. Once the vehicle is secure and the exhaust is cool to the touch, you can begin your visual check.
Look for signs of soot buildup around pipe joints and the manifold. Black, powdery residue is a clear indicator of an exhaust leak. You should also inspect the exhaust hangers, which are the rubber loops holding the pipes in place. If these are cracked or missing, the system will vibrate excessively, leading to premature wear on the metal components.
For a more active test, you can perform a “soapy water test.” With the engine cold, spray a mixture of dish soap and water onto the exhaust joints. Have an assistant start the engine briefly. If you see bubbles forming, you have found your leak. Be careful not to let the engine run too long, as the exhaust pipes heat up incredibly fast.
Checking for Internal Obstructions
Sometimes the problem isn’t a leak, but a blockage. A clogged catalytic converter can cause your Explorer to feel sluggish, as if it is struggling to “breathe.” You can check for this using a vacuum gauge connected to the intake manifold. If the vacuum reading drops steadily as you hold the engine at a steady RPM, you likely have a backpressure issue.
Another trick is to use an infrared thermometer to check the temperature of the catalytic converter. A healthy converter should be significantly hotter at the outlet than at the inlet. If the temperatures are nearly the same, or if the inlet is hotter, the internal ceramic brick may be melted or clogged. This usually necessitates a full replacement of that section of the 2016 ford explorer exhaust system.
2016 Ford Explorer Exhaust System: DIY Replacement Guide
If your inspection reveals a rotted muffler or a leaking mid-pipe, you can often save hundreds of dollars by doing the work yourself. Before starting, spray every bolt you intend to remove with a high-quality penetrating oil. Let it soak for at least thirty minutes; these bolts have survived years of heat cycles and road grime, and they will be stubborn.
To replace a section of the 2016 ford explorer exhaust system, you will typically need a 13mm and 15mm deep socket, an extension, and a break bar. Start from the rear of the vehicle and work your way forward. This allows the weight of the system to be supported by the front hangers while you disconnect the tailpipe and muffler sections.
When installing new parts, always use new gaskets and clamps. Reusing old gaskets is a recipe for a persistent leak that will drive you crazy later. Tighten the bolts in a “star” or alternating pattern to ensure the flange seats evenly. Once everything is bolted up, start the engine and listen for any new noises before lowering the vehicle.
Pro Tips for Rusted Bolts
If a bolt refuses to budge, do not force it with a long pipe on your wrench, as you will likely snap the stud. Instead, use a butane torch to heat the nut until it glows slightly orange. The heat causes the metal to expand, breaking the bond of the rust. Always keep a fire extinguisher nearby when using a torch under a vehicle.
If a bolt does snap, you may need to drill it out and use a bolt extractor. This is a common occurrence on the manifold studs of the 2016 Explorer. If you aren’t comfortable drilling into your engine block or manifold, this is the point where you should call a professional mechanic. A simple bolt extraction can quickly turn into a nightmare if the drill bit wanders off-center.
Performance Upgrades for Off-Road and Towing
Many owners choose to upgrade their 2016 ford explorer exhaust system to improve performance. If you use your Explorer for towing a boat or hitting light trails, a cat-back exhaust system can provide a modest boost in horsepower and torque. These systems replace everything from the catalytic converter back to the tailpipe.
Aftermarket systems often use mandrel-bent tubing. Unlike the factory pipes, which are “crush-bent” and restricted at the curves, mandrel-bent pipes maintain a consistent diameter throughout the bend. This reduces backpressure and allows the engine to expel gases more efficiently. It also gives the V6 a deeper, more authoritative growl without being overly “drone-y” on the highway.
For those who take their Explorer off-road, consider a high-clearance muffler. The stock muffler on the 2016 Explorer hangs somewhat low and can be a target for rocks or stumps. A smaller, tucked-away muffler provides better departure angles and reduces the risk of getting hung up on an obstacle. Just ensure any aftermarket part remains 50-state emissions legal if you live in an area with strict testing.
Choosing the Right Material
When shopping for upgrades, you will encounter T409 and T304 stainless steel. T409 is the standard grade used by many manufacturers; it is durable but will develop a layer of surface rust over time. If you live in the “salt belt” or near the ocean, investing in T304 stainless steel is wise. It contains higher levels of chromium and nickel, making it nearly impervious to rust and corrosion.
Safety Considerations and Carbon Monoxide
Safety should always be your top priority when dealing with the 2016 ford explorer exhaust system. Carbon monoxide (CO) is a colorless, odorless gas that can be fatal. If you suspect an exhaust leak, drive with your windows down and the climate control set to “fresh air” rather than “recirculate” until the repair is made.
Installing a portable CO detector in your cabin is a smart move for 2016 Explorer owners. This provides an objective measurement of air quality and can alert you to leaks that are too small to hear. If the alarm sounds, pull over immediately and exit the vehicle. Do not attempt to “power through” the drive, as CO poisoning can cause dizziness and impaired judgment very quickly.
When working on the exhaust, always wear impact-rated safety glasses. Rust flakes and metal shavings love to fall into your eyes the moment you touch a tailpipe. Additionally, wear mechanic’s gloves to protect your hands from sharp heat shields and the inevitable slip of a wrench. Taking these small steps ensures you can enjoy your DIY success without a trip to the emergency room.
Frequently Asked Questions About 2016 Ford Explorer Exhaust System
Why does my 2016 Ford Explorer smell like exhaust inside?
This is often caused by a combination of exhaust leaks (like a cracked manifold) and poorly sealed body seams at the rear of the vehicle. When the car moves, a vacuum effect pulls the leaked gases through the rear air extractors and into the cabin. Ford has released TSBs to address this by sealing the rear liftgate area and reprogramming the HVAC system.
How much does it cost to replace the exhaust manifold?
Replacing the exhaust manifold on a 2016 ford explorer exhaust system can be expensive due to the labor involved. On the 3.5L EcoBoost models, the turbochargers must often be removed to access the manifold. Expect to pay between $800 and $1,500 at a professional shop, depending on your location and whether the manifold studs snap during removal.
Can I drive with a broken flex pipe?
While the vehicle will technically run, it is not recommended. A broken flex pipe creates a loud noise and allows hot exhaust gases to vent directly under the chassis. This can melt plastic components, damage wiring harnesses, and increase the risk of carbon monoxide entering the cabin. It also causes the engine to run inefficiently by skewing O2 sensor readings.
Does a performance exhaust void my warranty?
In the United States, the Magnuson-Moss Warranty Act protects consumers. A manufacturer cannot void your entire warranty simply because you installed an aftermarket exhaust. However, if the aftermarket part directly causes a failure (for example, if a poorly fitted pipe melts a wire), that specific repair will not be covered. Always check with your local dealer if you have concerns.
Final Thoughts on Exhaust Maintenance
Maintaining the 2016 ford explorer exhaust system is about more than just keeping the car quiet; it is about performance, fuel economy, and most importantly, your family’s safety. By staying proactive with visual inspections and listening for changes in engine sound, you can catch minor issues before they escalate into major repairs.
If you decide to tackle an exhaust repair yourself, remember to use the right tools, plenty of penetrating oil, and never compromise on safety. Whether you are replacing a simple hanger or upgrading to a full stainless steel system, the effort you put in now will pay off in the long run. A well-maintained exhaust ensures your Explorer remains a reliable companion for all your adventures.
Take the time to inspect your undercarriage this weekend. Look for those tell-tale signs of soot and rust. If you find something, don’t wait—address it now and keep your Ford running strong. Stay safe and stay comfortable!
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