Ford Bronco Engine Problems
Source: Pixabay
The return of the legendary Bronco to Ford’s lineup in 2021 came with much fanfare. Blue Oval enthusiasts rejoiced at the resurrection of a treasured nameplate, and offroad adventurers proclaimed that the Jeep Wrangler finally had a worthy competitor. However, some owners encountered Ford Bronco engine problems with the twin-turbocharged 2.7-liter V6.
These were no ordinary troubles, with some experiencing total engine failure. Motor Trend reports that the issue has occurred on Broncos with as few as three miles, with most instances happening with an average of 2,491 miles on the odometer.
The thought of a new (and expensive) vehicle with potentially catastrophic engine troubles can be distressing, especially if you already have a Ford Bronco in the driveway. The situation can be equally confusing if you’re thinking about buying one.
Keep reading as we examine Ford Bronco engine problems, focusing on the EcoBoost 2.7 V6.
Ford Bronco Engine Problems: EcoBoost 2.7 V6 Valve Train Issues
Preliminary findings have revealed that the source of the problem can be traced to a faulty valve train in the EcoBoost 2.7-liter V6. The valve train is an integral part of a modern internal combustion engine and ensures optimal operation of the intake and exhaust valves. This component consists of valve springs, lifters, and rocker arms. When everything works right, the engine can deliver smooth performance, maximum fuel economy, and minimal emissions.
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Owner filings and industry reports indicate the problems with this troublesome valve train are concentrated in three areas. We’ll do our best to limit the technical talk.
- Premature Camshaft Lobe Wear: The camshaft is integral to proper valve opening and closing; lobes (yes, they kind of look like ear lobes) make this happen. Some Bronco owners discovered premature lobe wear, causing the valves not to lift correctly, affecting engine performance and fuel economy.
- Faulty Lifters: Lifters convert the rotational movement of a camshaft into an up-and-down motion that opens and closes valves. In extreme cases, reports of lifter failure have followed engine misfires and camshaft damage.
- Irregular Valve Timing: Correct valve timing ensures that the valves open and close at precise moments to ensure optimal engine performance. Whether it’s caused by a defective component or software glitch, improper valve timing zaps performance and decreases fuel economy, conditions suffered by some Ford Bronco owners.
We can add other possible causes to the list of possible contributors to Bronco valve train issues. These include poor build quality of the affected components and insufficient lubrication, which can lead to premature wear.
A review of documentation from the National Highway Traffic Safety Administration (NHTSA) uncovers the overarching issue with the 2.7-liter V6’s valve train. According to an open NHTSA investigation, “Ford identified the root cause as the valve ‘keepers’ not holding the retainer in place, allowing the valve spring to detach from the valve resulting in interference between the valve and piston. This interference can cause an engine lockup.”
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What Ford Broncos Are Affected by Valve Train Problems?
There’s no official list, from either Ford or the government, about which Ford Broncos are vulnerable to 2.7-liter V6 engine troubles. The issues began with the 2021 model year, the first of the current-generation Bronco, so this is the starting point.
NHTSA’s investigation only covers the 2021 model year, but owners of the 2022 Bronco also tell of similar issues. NHTSA records show a small number of engine-related complaints for the 2023 model year, but there are insufficient details to see if this edition is also affected by valve train troubles.
At this point, we’d say that the 2021 and 2022 Broncos are susceptible to this issue (the verdict is still out on the 2023 edition). However, this caution doesn’t apply to every Bronco built for these model years, only the ones with the Ecoboost 2.7-liter V6. This powerplant came standard in some higher Bronco trims and was optional in most other versions. NHTSA says that more than 25,000 Broncos may be vulnerable to this fault.
Symptoms of Ford Bronco Engine Problems
There are several ways that valve train problems become evident. Often, this starts with rough engine idling, which can progress to stalling or noticeable power reduction. Several Bronco owners have reported that the engine unexpectedly died while the car was in motion and couldn’t be restarted.
Owners should also be aware of auditory clues about valve problems. Listen for ticking, knocking, or clattering sounds, especially during cold starts.
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Government Action about Ford Bronco Engine Problems
NHTSA administers vehicle recalls in the U.S., but as of this writing, there are no recalls relating to valve train problems with the 2.7-liter engine. In May 2022, the agency opened an investigation into the matter; the inquiry remains open.
Such action can lead to a recall, but this can take time. To date, NHTSA has 26 reports that cite valve train failure. It’s unknown if this is sufficient to trigger a recall.
Regardless, it’s always a good idea for owners (of any make and model) to check if their vehicles are subject to a recall. Used car buyers should do the same thing. This information can be accessed easily at NHTSA’s website.
Owner Steps with Ford Bronco Engine Problems
While having a Ford Bronco with engine troubles can be worrisome and inconvenient, owners aren’t without a remedy. When new, the Bronco is sold with a three-year or 36,000-mile bumper-to-bumper warranty and a five-year or 60,000-mile powertrain (covering the engine, transmission, and drive axle). This coverage applies to current and subsequent Bronco owners, assuming the time and mileage limits haven’t been crossed.
Ford Bronco owners who suspect valve train issues should immediately contact an authorized dealer. Don’t wait. Even if the car is drivable, the engine can become inoperable at an inopportune or unsafe time (as some owners have experienced).
Those thinking about buying a used Ford Bronco with a 2.7-liter engine should exercise caution. At a minimum, the vehicle should undergo a thorough pre-purchase inspection, with special attention paid to the engine. In addition, any Bronco under consideration should still have warranty coverage remaining, just in case the valve train problem arises later.
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