2018 Ford Fusion: engine overheating

Filed Oct 5, 2026 · Engine · FL

My 2018 Ford Fusion suffered a sudden and complete engine failure caused by internal coolant intrusion — coolant leaking into the cylinders and destroying the engine. Pep Boys diagnosed that the failure developed internally over time and could not have been avoided by the owner. This is a known Ford factory defect in the 2.0L EcoBoost engine, documented in Ford's own publications (SSM 47204, SSM 47462, TSB 19-2346, TSB 22-2229), all of which cover the 2018 Fusion. The root cause is Ford's open-deck engine-block design, which allows coolant intrusion and cracking between cylinders. Ford corrected the design in 2019 production. A federal class action (Nelson et al. v. Ford, E.D. California) and the federal safety agency defect petition DP26008 concern this same defect. The sudden loss of engine power created an unsafe driving condition. My warranty claim was denied based on a 'blown head gasket' finding, which is the symptom of the factory defect, not the cause.

Filed Sep 25, 2026 · Engine · OH

My 2018 Ford Fusion Titanium FWD (VIN: [XXX]) suffered a catastrophic engine failure while driving, causing sudden vehicle overheating, severe engine misfires, and a dangerous loss of power on the roadway.A certified Ford dealership inspection (Invoice #XXX) confirmed that the vehicle has a textbook manufacturing flaw known as EcoBoost coolant intrusion. A pressure test showed an immediate 5 PSI drop within 10 minutes, and a borescope confirmed that engine coolant is actively leaking across the block interface and pooling directly inside the engine cylinders (cylinders 2 and 3).This is a known, widespread structural engineering defect in Ford's block casting that creates a severe, sudden safety hazard by causing vehicle stalling and clouding exhaust smoke while operating at highway speeds. The vehicle is now entirely unsafe to drive and requires a full engine block replacement. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 20, 2026 · Engine · KY

My engine coolant keeps on overheating, I’ve tried changing the antifreeze tank out for a brand new one and it helped the issue for a while but I have to relieve the pressure myself which is a hazard. I’ve had to change the coolant in the tank more than 5 times and it just seems like it’s leaking somewhere other than going into the engine to cool it. When I go out roundabouts off a highway the engine overheats and makes the car go into a safe mode where it won’t go and I have to stop on the side of the road. When I’m driving with my heat on the heat will go cold when I slow down. If I’m not going over 3x1,000 RPMs it will go cold and fluctuate. This has been going on for months now.

Filed Aug 25, 2026 · Engine · DE

my 2018 ford fusion has catastrophic engine failure. Engine stuttering and misfires with check engine light. Low coolant levels with no visible puddles under the car. Engine overheating, could possibly catch fire. Car recently had a tuneup was told no issues at the time. Failure mileage at 109,000.

Filed Aug 4, 2026 · Engine · MD

Coolant leaking into the engine.

Filed Jun 13, 2026 · Engine · IA

Per mechanic, head gasket has failed due to known issue with 1.5L Ecoboost engines. Coolant is leaking into the engine. White smoke in the exhaust indicating coolant leak. Vehicle is currently availble for inspection upon request, but is destined to be sold. Driver safety as well as surrounding driver safety as risk should engine completely fail due to overheating while driving, potentially causing an accident. There is currently a class action lawsuit in the works for this issue as many other have had it. At this time vehicle has only been inspected by our local mechanic. There were no warning lamps, messages or other symptons prior ot the issue. When the issue stated, there was a "waterfall" sound in the engine compartment, which caused us to take the vehicle to the mechanic for diagnoses.

Filed May 25, 2026 · Engine · AZ

My 1.5L EcoBoost engine experienced coolant intrusion into the cylinders, a known and documented defect associated with this engine family across multiple Ford model years. Prior to the failure, the vehicle displayed symptoms consistent with internal coolant loss, including white exhaust smoke, coolant level dropping without visible external leaks, and rough running. No external coolant leak was ever identified. The vehicle was subsequently diagnosed by an independent service center, which confirmed coolant intrusion into the engine internals consistent with a head gasket or coolant jacket failure. The component is available for inspection upon request. The failure rendered the vehicle completely undriveable. The vehicle has been out of service for approximately 12 months and has not been driven since the failure occurred. The repair was quoted at approximately $12,000 for a full engine replacement, exceeding the current market value of the vehicle. Safety was put at risk due to sudden loss of engine performance and drivability while the vehicle was in use on public roads. Coolant intrusion can cause hydrolock, catastrophic engine seizure, and sudden loss of power, all of which create risk of collision, particularly at highway speeds. This failure is consistent with a well-documented defect in the 1.5L EcoBoost engine design, which has been the subject of technical service bulletins and consumer complaints regarding coolant entering the combustion chamber. The failure occurred with no prior accident, overheating event, or owner-caused damage.

Filed May 25, 2026 · Engine · PA

On [XXX], I drove my 2018 Ford Fusion Titanium AWD to a doctor 37 miles away through rural PA. The car was a reliable workhorse, needing only regular shop visits, and had 108K miles by this date. Midway through the [XXX] drive , a red warning square popped up on the dash to tell me that the engine was overheating, and a pink warning square said the car would lessen electrical draw so that it could cool the engine. Both alerts disappeared quickly. There was no unusual sound or smell before the alerts nor the rest of the drive. I also had no prior dash alerts, only ?3 misfires months apart I now know were symptoms of [XXX]. During down time before/after the doctor, I Googled the error messages and read my owner's manual. I restarted the car w/o incident after it had sat for 45 minutes. Six miles into my way home, the same red square popped up, though no second alert did. I pulled over at a clearing 3 miles later. I sat by the side of the road without cell service for 45 minutes. I had no coolant or water with me. I was unable to remove the coolant lid after the wait, nor could I see if there were coolant in the reservoir. I needed to move the car because of having no cell service. After a total of 75 minutes, I restarted the vehicle and moved 2 miles up the road. A red triangle icon appeared and stayed on. I called my dealer, described what happened, and they told me to tow the car the 21 miles to them. My dealer found no issue beyond a cracked spark plug on cylinder 3 that they replaced 4K miles earlier. Not satisfied, my B-I-L and I researched the incident and found the 2.0L EcoBoost coolant intrusion issue. I had the car tested according to Ford's TSB #19-2346 at a separate dealer; they duplicated the intrusion in cylinder 3, and we had a diagnosis. I was fortunate that the car didn't stop mid-traffic, didn't catch fire, and I was stranded in daylight in an Amish community. The other side of that coin is grim. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 21, 2026 · Engine, Fuel system · CA

Formal Complaint – 2018 Ford Fusion 1.5L EcoBoost – Engine Block Defect Statement of Issue:I am writing to report a premature engine failure on my 2018 Ford Fusion 1.5L. The vehicle is exhibiting all symptoms of the well-documented "coolant intrusion" defect described in Ford Technical Service Bulletin (TSB) 22-2222. Despite following all recommended maintenance intervals, the engine block has failed, allowing coolant to enter the combustion chamber.Observations:Confirmed coolant loss with no external leakage found via pressure test.Significant white smoke and rough idle upon cold start. Desired Resolution: Since this is a known manufacturing defect involving the engine block's cooling channels—and not a result of wear and tear—I am requesting a "Goodwill Repair" for a long-block replacement. The current TSB denial based on [8 years] is unacceptable for a known catastrophic design flaw that compromises vehicle safety.

Filed May 3, 2026 · Engine · TN

The engine has coolant intrusion. It is available upon inspection. Safety at risk due to side effects from the intrusion such as: engine overheating, misfiring, massive coolant loss that could cause an engine fire. The problem was diagnosed as a blown head gasket, but there is evidence of coolant loss and corrosion of spark plugs etc from coolant in engine. Has not been inspected by insurance or police. Symptoms started March 2026; check engine light on showing code P0303 (misfire in cylinder 3) and code for over temperature sensor. It occasionally ran hot, rough start up, misfiring, coolant loss (without external leaks), trouble accelerating, eventual service wrench light, and sometimes flashing engine light when it misfired bad.

Filed Mar 28, 2026 · Engine, Fuel system · MI

- There is a crack in the engine block; coolant is leaking into cylinder 3. I am having the car taken by carvana on 3/30 and it will no longer be available for inspection, but I have record of the mechanical issues from taking the vehicle into the dealership on 3/18. - My/others safety was not immediately at risk, but I know that my engine could have blown while driving, causing an accident or even an engine fire. - As stated, issue was confirmed by dealer, and I have records of this - N/A - Check engine light appeared on approximately 3/5; was unable to have car inspected right away and continued driving. Started to get intermittent errors stating that the engine was overheating/coolant was low on 3/12. Stopped driving car more than 2 miles at a time after this. Boyfriend correctly diagnosed issue on 3/15 and I had the issue confirmed by dealer on 3/18.

Filed Mar 19, 2026 · Engine, Fuel system · MI

2018 Ford Fusion SE 1.5L EcoBoost, just purchased the car 10 days ago and I already have antifreeze that's mixing with the oil causing the car to overheat and white smoke coming from the back cannot drive the car took it to three mechanics they told me it needs a new turbo and a head gasket which will cost well over $4,000 which I don't have the money that I bought the car with I borrowed from family members so I can go back to work and I don't have money to fix it so at the moment I am unemployed because I have no vehicle to get to work this is a major problem. My father before he passed away had a 2017 Ford Escape with the same engine and he had the same problem he sold it for $1500 lost 14 Grand on it