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ENGINE DATA
Engine 3.5L V6 engine
3.5L V6 EcoBoost™
engine
Cubic inches 214 214
Fuel
See Octane
recommendations
earlier in this chapter.
See Octane
recommendations earlier
in this chapter.
Firing order 1–4–2–5–3–6 1–4–2–5–3–6
Spark plug gap
0.052–0.056 inch
(1.32–1.42 mm)
0.033–0.037 inch (.84–
.94 mm)
Ignition system Coil on plug Coil on plug
Compression
ratio
10.3:1 10.0:1
Engine drivebelt routing
3.5L V6 engine
1. Short drivebelt is on first pulley groove closest to engine (not
applicable to vehicles with electric power assisted steering).
2. Long drivebelt is on second pulley groove farthest from engine.
Maintenance and Specifications
381
2011 Flex (471)
Owners Guide, 1st Printing
USA (fus)