Ford 3.5 EcoBoost Gen 1 Engine Specs

The Ford 3.5 EcoBoost Gen 1 is a 3.5-liter twin-turbocharged V6 petrol engine produced from 2010 to 2019, developed as part of Ford's first generation of EcoBoost technology to bring meaningfully more power and towing capability to full-size trucks and SUVs while improving fuel economy compared with the larger naturally aspirated V8 engines it was designed to complement or replace. It has been used across the Ford F-150, Explorer, Flex, Taurus SHO, Expedition, Transit, and several Lincoln models including the MKS, MKT, and Navigator.

Producing between 310 and 380hp and substantial torque of 475-624Nm depending on application and tune, the Gen 1 3.5 EcoBoost uses a DOHC 24-valve head, twin turbochargers, direct injection, and a compression ratio of 10.0:1, delivering genuinely strong low-end and mid-range pulling power that made it a popular choice in F-150 trucks for buyers wanting V8-like towing capability with better fuel economy than a comparable naturally aspirated V8.

As with most first-generation applications of new turbocharging technology, several known issues are worth understanding on used examples. Carbon buildup on the intake valves is common over high mileage, a trait shared by nearly all direct-injection engines, and periodic intake cleaning helps maintain performance and smooth running. Early examples in particular have been associated with occasional turbocharger wastegate rattle and, in some cases, premature turbocharger wear, particularly on vehicles used for heavy or frequent towing without adequate cool-down periods. The timing chain, tensioners, and associated components should be inspected on higher-mileage examples, as chain-related noise has been reported on some units. Cooling system health matters considerably given the heat generated by twin turbochargers under sustained heavy load, particularly in trucks used for towing in hot climates. Spark plugs on this engine can be a notably involved and labor-intensive replacement job due to the twin-turbo V6's tightly packaged engine bay, which is worth factoring into expected maintenance costs. With attentive maintenance, the Gen 1 3.5 EcoBoost has proven capable of covering 300,000km or more, and it remains a popular, well-understood choice in the F-150 and Explorer used markets specifically because of its strong power-to-economy balance.