Did Ford Fix The 1.5 Ecoboost Problems – The Truth About Coolant
Ford addressed the 1.5L EcoBoost issues by redesigning the engine block to eliminate the coolant intrusion path between cylinders. While older 4-cylinder models often require a revised short-block replacement, the newer 3-cylinder “Dragon” engines and updated block designs have significantly improved long-term reliability.
If you are shopping for a used Ford Escape or Fusion, you have likely heard the horror stories regarding the 1.5L EcoBoost engine. It is frustrating to invest in a modern vehicle only to worry about a catastrophic engine failure before the loan is even paid off.
I understand the anxiety that comes with hearing terms like “coolant intrusion” and “engine replacement” during your research. You want a vehicle that gets you to work or out to the trails without a check engine light ruining your weekend plans.
In this guide, we will dive deep into the technical details of the 1.5L engine flaws and answer the burning question: did ford fix the 1.5 ecoboost problems for current and future owners? We will look at the specific redesigns, the TSBs involved, and how you can spot a “fixed” engine on the lot.
Understanding the Infamous Coolant Intrusion Issue
To understand the fix, we first have to look at the flaw that caused so much trouble for Ford owners between 2014 and 2019. The primary issue with the 1.5L 4-cylinder EcoBoost was coolant intrusion into the engine cylinders.
This happened because of a specific design choice in the engine block. There were small grooves or “slits” cut into the block surface between the cylinder bores to help with cooling flow. Over time, the high pressure of the combustion cycle caused the head gasket to fail at these weak points.
Once the seal was lost, engine coolant would seep into the combustion chamber. This led to white smoke from the exhaust, engine misfires, and eventually, a completely hydrolocked engine that could not be repaired without a total teardown.
did ford fix the 1.5 ecoboost problems for good?
The short answer is yes, Ford did eventually implement a hardware fix for the 1.5L EcoBoost problems. However, the “fix” depends entirely on the production date of the engine and which generation of the 1.5L you are looking at.
For the older 4-cylinder (I4) version, Ford released a Technical Service Bulletin (TSB) that identified the flaw. The permanent solution for these engines was not just a new gasket, but a completely redesigned short block that eliminated the cooling grooves between the cylinders.
If you are looking at a 2020 or newer model, you are likely dealing with a completely different engine architecture. Ford shifted many models to a 1.5L 3-cylinder (I3) engine, which was designed from the ground up to avoid the structural weaknesses of its predecessor.
Because of these changes, the 1.5L platform is much safer today than it was in 2017. If you are buying used, checking the service records to see if the block was replaced under warranty is a critical step for your peace of mind.
The Redesigned Block: How Ford Changed the Hardware
When Ford engineers realized the “open deck” cooling grooves were the culprit, they went back to the drawing board. The revised 1.5L 4-cylinder blocks, often referred to as the 910 block, feature a different cross-drill design.
Instead of the open slits that allowed the head gasket to bridge across a gap, the new design uses small, precisely drilled holes. This provides structural integrity to the top of the cylinder wall while still allowing enough coolant flow to prevent overheating.
This redesign ensures that the head gasket has a flat, solid surface to clamp down on. By removing the “sinkhole” where the gasket used to fail, Ford effectively stopped the coolant migration into the cylinders.
If you are a DIY mechanic, you can sometimes identify these revised blocks by looking at the casting marks. However, for most owners, the easiest way to verify the fix is by checking if the part number on the engine matches the updated version listed in Ford’s TSB 19-2346.
The Move to the 3-Cylinder “Dragon” Engine
For the 2020 Ford Escape and the Bronco Sport, Ford introduced the 1.5L 3-cylinder EcoBoost. This engine is part of the Dragon engine family and is fundamentally different from the older 4-cylinder units.
The 3-cylinder version uses a timing chain instead of a belt and features a much more robust block design. It also includes cylinder deactivation technology to help with fuel economy when you are just cruising on the highway.
So far, the 3-cylinder variant has not shown the same widespread coolant intrusion issues. It has proven to be a reliable workhorse for those who want a balance of power and efficiency without the looming threat of a $6,000 engine bill.
Signs Your 1.5L EcoBoost Might Have a Problem
Even though there is a fix, many older vehicles are still on the road with the original, flawed block. If you own one of these, you need to be vigilant about early warning signs before the engine fails completely.
The most common symptom is a rough cold start. If the car stumbles or shakes for the first 30 seconds after sitting overnight, it might be burning off coolant that leaked into the cylinder while the engine was off.
Keep a close eye on your coolant reservoir. If you find yourself topping it off every few weeks but don’t see any puddles on your driveway, the engine is likely “consuming” the coolant internally.
- White Smoke: Persistent white smoke from the tailpipe that smells sweet like maple syrup.
- Check Engine Light: Codes P0300 through P0304, which indicate cylinder misfires.
- Low Coolant Warning: The dashboard alert triggers even though the radiator hoses look dry.
If you notice these signs, do not wait. Continuing to drive a 1.5L EcoBoost with coolant intrusion will lead to engine overheating and potential permanent damage to the cylinder head.
Maintenance Strategies for EcoBoost Owners
Whether you have the revised block or the older version, maintenance is your best defense. Turbocharged engines like the EcoBoost are much harder on their oil and cooling systems than naturally aspirated engines.
I always recommend a 5,000-mile oil change interval using high-quality full synthetic oil. This helps protect the turbocharger bearings and ensures the variable valve timing (VVT) components stay clean and functional.
Furthermore, never ignore your cooling system. Use only the Ford-approved Motorcraft coolant (usually the yellow OAT type for newer models) and ensure there are no air pockets in the system.
- Check your coolant level at least once a month.
- Use a high-quality oil filter to prevent dry starts.
- Replace your spark plugs every 40,000 to 50,000 miles to reduce stress on the ignition coils.
- Listen for “low-speed pre-ignition” (LSPI) sounds, which are metallic clicking noises under heavy load.
By staying proactive, you can extend the life of your engine and catch small leaks before they turn into major mechanical failures. A well-maintained EcoBoost can easily cross the 150,000-mile mark with proper care.
Frequently Asked Questions About did ford fix the 1.5 ecoboost problems
Which Ford models are affected by the 1.5L coolant intrusion?
The most commonly affected models are the Ford Escape (2014-2019) and the Ford Fusion (2014-2019). Some Ford Focus models equipped with the 1.5L I4 also faced similar issues during these production years.
Is there a recall for the 1.5L EcoBoost coolant issue?
There was no universal safety recall for the coolant intrusion, but Ford issued Customer Satisfaction Programs (like 21N12) and TSBs. These programs often extended the warranty or provided coverage for engine replacements under specific conditions.
How can I tell if my engine has the redesigned block?
The best way is to check the engine build date on the sticker located on the timing cover. Engines manufactured after April 2019 generally feature the revised block design that prevents coolant intrusion.
Is the 1.5L 3-cylinder engine better than the 4-cylinder?
From a reliability standpoint regarding coolant intrusion, yes. The 3-cylinder Dragon engine uses a different cooling jacket design that is not prone to the same head gasket failures found in the older 4-cylinder units.
What should I do if my Ford is losing coolant?
You should immediately perform a cooling system pressure test. If the system loses pressure but no external leaks are found, a technician should use a borescope to look for coolant inside the cylinders.
Final Thoughts on the 1.5L EcoBoost Fix
Navigating the world of used Fords can be tricky, but the data is clear: Ford did take steps to rectify the 1.5L flaws. By redesigning the engine block geometry and eventually moving to a new engine architecture, the company addressed the root cause of the failures.
If you are currently driving an older model, don’t panic, but do stay observant. Watch your fluid levels and listen to how your engine sounds on a cold morning. If you are in the market for a newer Ford, prioritize models built after 2020 to ensure you have the latest engineering updates.
The EcoBoost platform offers great performance and fuel economy when it is working correctly. By understanding the history of these issues and verifying that the necessary updates have been made, you can drive with confidence. Stay safe, keep an eye on those gauges, and enjoy the road ahead!
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