Modern engines can withstand plenty of punishment, but if you’re dead set on shortening their lives, neglecting basic maintenance is one of the best ways to do it. One 2021 Lincoln Aviator’s twin-turbocharged V6 recently provided an ugly reminder of that fact.
With fewer than 70,000 miles on the clock, this 3.0-liter EcoBoost should have had plenty of life left in it. Instead, it ended up on an engine stand, waiting to be pulled apart.
Eric Berg of the I Do Cars YouTube channel acquired the failed engine through a salvage-yard core exchange. With little information about its past, he used the VIN stamped on the block to investigate its service history.
The Carfax report showed just two recorded oil changes over nearly 70,000 miles. Now, that didn’t necessarily mean the owner had only changed the oil twice, but what Berg discovered inside suggested maintenance had been seriously neglected.
The First Valve Cover Told the Story
Berg barely needed to begin the teardown before things got ugly. Removing the first valve cover exposed thick sludge and dark varnish coating the valvetrain.
“I’ve seen engines with 250,000, 300,000 miles that look 10,000 times better than this,” he said. The opposite cylinder bank looked similarly awful.
Bearing Material Everywhere
The variable cam timing solenoids offered another warning, with their screens packed with sludge and metallic debris. The oil filter contained shiny particles, while the timing cover concealed more silvery residue.
Things became even worse when Berg removed the oil pan. Bearing shavings had accumulated inside, leaving little doubt that the engine’s rotating assembly had suffered serious damage.
The EcoBoost Put Up a Fight
Interestingly, the engine hadn’t completely seized, and several components looked better than expected. Its timing chains and guides appeared serviceable, although virtually everything was stained by contaminated oil.
The real failure emerged when Berg inspected the connecting-rod bearings. Number six had spun its bearing, with Berg blaming debris circulating through the oil rather than outright oil starvation.
Berg even believed the compacted-graphite-iron block might be reusable. Considering the conditions inside, the EcoBoost had survived an extraordinary amount of abuse before finally giving up.
A Warning for Used-Car Buyers
Berg stressed that Carfax doesn’t capture every oil change, especially work performed at home or by shops that don’t report maintenance, so the records alone couldn’t establish exactly how often this Lincoln had been serviced.
His advice is to arrange a thorough pre-purchase inspection when a vehicle’s maintenance history raises questions. Checking accessible variable cam timing solenoid screens can sometimes reveal contamination before an expensive failure becomes obvious.
As Berg put it, “If you can afford a brand new Lincoln, you can afford to change its oil.” Perhaps the owner actually had so much money he simply viewed the Aviator as disposable? Who knows?! All we can say is that its damage makes a convincing case for keeping up with basic maintenance.