ENGINE SPECIFICATIONS
Engine 3.5L V6 engine
3.5L V6 EcoBoostā¢
engine
Cubic inches 214 214
Fuel
See Octane
recommendations in
the Fuel and Refueling
chapter.
See Octane
recommendations in the
Fuel and Refueling chapter.
Firing order 1ā4ā2ā5ā3ā6 1ā4ā2ā5ā3ā6
Spark plug gap
0.049-0.053 inch
(1.25-1.35 mm)
0.033ā0.037 inch (.84ā
.94 mm)
Ignition system Coil on plug Coil on plug
Compression
ratio
10.8:1 10.0:1
Engine Drivebelt Routing
370 Capacities and Specifications
2013 Flex (471)
Owners Guide gf, 1st Printing
USA (fus)