The firing order for Ford's 3.7-liter Duratec V6 is 1-4-2-5-3-6. This sequence helps balance the engine’s two banks and provides smooth operation across RPM ranges.
The 3.7 L V6, often referred to as the Duratec 37, is a 60-degree V6 used in several Ford mid-size models and trucks during the 2010s. As with any timing-related specification, exact details can vary by model year and variant, so always confirm with the official service manual or a reliable OEM source for your vehicle before performing timing-related work.
Engine layout and cylinder numbering
Understanding the firing order requires knowing how the engine is laid out. The Duratec 37 is a dual-overhead-camshaft V6 with six cylinders arranged in two banks. Typically, one bank is numbered 1-3-5 and the opposite bank 2-4-6, with the firing sequence cycling between banks to maintain balance and smooth power delivery.
Firing order sequence
Before performing timing work, note this commonly cited firing sequence for the Duratec 37 family. The sequence below reflects the order used in many service references; always verify against your exact model-year manual for precise timing marks and any variant.
- 1
- 4
- 2
- 5
- 3
- 6
This arrangement distributes combustion events across both banks, helping to reduce vibration and maintain even torque across the engine’s operating range.
In practice, technicians verify timing by aligning the crankshaft and camshaft timing marks, then ensure the cylinders fire in the order above while the engine is rotated to the correct Top Dead Center position for cylinder 1. If you’re re-timing or replacing timing components, follow the OEM procedure exactly, including any notes about variable cam timing or specific timing checks for your vehicle.
Note that some model-year variants or regional versions of the 3.7 L V6 may use slightly different cylinder numbering conventions or firing order specifics. Always consult the exact factory manual for your engine variant to confirm the correct sequence.
Summary: The commonly cited firing order for Ford's 3.7 L Duratec V6 is 1-4-2-5-3-6, with cylinders 1-3-5 on one bank and 2-4-6 on the other. Verify the exact order in your vehicle’s service documentation before performing any timing work. The chosen sequence is designed to maximize balance and smoothness across the engine’s RPM range.