Does the manual say how to change the plugs?
No. The 2.7L and 3.5L notes say to contact a dealer for spark plug replacement. The 3.3L and 5.0L notes point at the schedule and do not print a removal procedure.
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In-depth guide
2020 Ford F-150
2020 Ford F-150 spark plug gap, Motorcraft number, and firing sequence by gasoline engine. The manual does not print a removal procedure.
Difficulty, time, and cost are estimates when this guide gives them. Torque is a cited figure, or it is left off.
Main source: 2020 F-150 Owner's Manual, engine specifications and Motorcraft parts (opens in a new tab), Ford Motor Company, published 2019-07-01, read 2026-10-15.
Numbers on this page come from the cited source. Match the engine before you use a capacity or a torque. Do not work under a vehicle held only by a jack.
None listed for removal
The parts notes tell you to contact a dealer or to follow the maintenance schedule. They do not name a socket or a gap tool.
| Item | Figure | Where it comes from |
|---|---|---|
| 2.7L EcoBoost | Coil on plug. Gap 0.028–0.031 in (0.7–0.8 mm). Motorcraft SP-578. Firing order 1-4-2-5-3-6. | Engine specifications and the 2.7L Motorcraft parts table |
| 3.3L | Coil on plug. Gap 0.049–0.053 in (1.25–1.35 mm). Motorcraft SP-520. Firing order 1-4-2-5-3-6. | Engine specifications and the 3.3L Motorcraft parts table |
| 3.5L EcoBoost | Coil on plug. Gap 0.028–0.031 in (0.7–0.8 mm). Motorcraft SP-578. Firing order 1-4-2-5-3-6. | Engine specifications and the 3.5L Motorcraft parts table |
| 5.0L | Coil on plug, coil near plug. Gap 0.049–0.053 in (1.25–1.35 mm). Motorcraft SP-551. Firing order 1-3-7-2-6-5-4-8. | Engine specifications and the 5.0L Motorcraft parts table |
2.7L EcoBoost
3.3L
3.5L EcoBoost
5.0L
Firing sequence from the 2020 F-150 owner's manual engine specifications. Sequence only.
Illustration, not to scale; confirm with your owner's manual. This is the firing sequence only. It does not show where each cylinder sits on the engine.
Source for this drawing: 2020 Ford F-150 Owner's Manual, edition July 2019, Engine Specifications for the 2.7L EcoBoost, 3.3L, 3.5L EcoBoost, and 5.0L.
Read the engine on the emissions label or the driver's door and use that row. SP-578 is listed for the 2.7L EcoBoost and the 3.5L EcoBoost. SP-520 is listed for the 3.3L. SP-551 is listed for the 5.0L.
The specification tables print 0.028–0.031 in (0.7–0.8 mm) for the 2.7L and the 3.5L EcoBoost, and 0.049–0.053 in (1.25–1.35 mm) for the 3.3L and the 5.0L. The 5.0L ignition line says coil on plug, coil near plug. The other three say coil on plug.
The firing order is 1-4-2-5-3-6 on the 2.7L, 3.3L, and 3.5L, and 1-3-7-2-6-5-4-8 on the 5.0L. That is the order in the specification table. It is not a map of the coils on the engine.
For the 2.7L and the 3.5L, the parts notes say to contact an authorized dealer for spark plug replacement and to replace plugs at the scheduled interval. The 3.3L and 5.0L notes also point at the schedule and do not print a removal procedure. Do not pull a coil from a video for a different engine.
The specification pages also print a drive-belt figure for each engine. Those figures are not redrawn here. See the drive belt sheet for the figure IDs and the link to the manual.
The diesel firing order in the same chapter is 1-4-2-5-3-6, and the diesel parts table lists glow plug ZD-22. That engine is left off the spark plug drawing on purpose.
Outbound links only. BaySheet does not sell parts. Confirm fitment on the retailer page. Amazon links are searches for the part name plus this vehicle. They are not a part number.
Part
Motorcraft spark plug for the gasoline engine
SP-578, SP-520, or SP-551 as listed above. The manual says to use Motorcraft parts that meet Ford's specification.
Spark plug numbers in the 2020 F-150 owner's manual (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
Tool
None listed for removal
The parts notes tell you to contact a dealer or to follow the maintenance schedule. They do not name a socket or a gap tool.
Spark plug notes in the 2020 F-150 owner's manual (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
No. The 2.7L and 3.5L notes say to contact a dealer for spark plug replacement. The 3.3L and 5.0L notes point at the schedule and do not print a removal procedure.
0.049-0.053 in (1.25-1.35 mm), Motorcraft SP-551, firing order 1-3-7-2-6-5-4-8. The 2.7L and 3.5L EcoBoost gap is the tighter 0.028-0.031 in range, and those engines use SP-578.
The maintenance checklist is on the site now. The email list is not sending yet, so this box will not store an address.
These guides cover the same kind of work. Their numbers belong to those vehicles, not to this one.