2021 Ford Edge 2.0L EcoBoost Spark Plug Replacement — DIY Guide

Dealers charge $150–$220 to replace spark plugs on the Edge's 2.0L EcoBoost; the DIY cost is around $40–$50 for four OEM plugs. Coil-on-plug design, accessible from above, no disassembly beyond the engine cover.

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Parts & Tools

Item	OEM / Spec	Detail
Spark plugs (qty 4)	Motorcraft SP-520	Iridium tip, pre-gapped — do not regap
Spark plug gap	0.032 in (0.81 mm)	Factory pre-set on SP-520 — confirm, don't adjust
Ignition coils	Motorcraft DG-511	Inspect each; replace if cracked or carbon-tracked
Replacement interval	60,000 miles	Ford OEM Motorcraft recommendation
Spark plug torque	13 lb-ft (18 Nm)	Do not overtighten — aluminum head
Anti-seize	Do NOT use	Pre-applied coating on SP-520 threads

Tools: 5/8 in (16mm) spark plug socket, 3/8-drive 6-inch extension, ratchet, needle-nose pliers, dielectric grease.

Torque note: The Motorcraft SP-520 comes with a factory-applied thread lubricant — do NOT add anti-seize. Additional anti-seize changes the effective torque value and can strip the aluminum head. Install at exactly 13 lb-ft.

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DIY vs. Shop Cost

Item	DIY Cost	Shop Cost
Motorcraft SP-520 (4-pack)	$28–$40	—
Dielectric grease (tube)	$3–$5	—
Total parts	~$31–$45	—
Labor	$0	$100–$175
Total	~$31–$45	$150–$220

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Step-by-Step Spark Plug Replacement

1. Let the Engine Cool

Let the engine cool completely — at minimum 2 hours after last running, ideally overnight. Aluminum head threads are easily damaged by overtightening on hot metal.

2. Remove the Engine Cover

Lift the plastic engine cover straight up — four to six friction-fit mounts. No tools required.

3. Disconnect Coil Connectors

Four coil-on-plug (COP) assemblies sit directly over each plug. Disconnect each connector by pressing the locking tab and pulling straight out. Work one cylinder at a time.

4. Remove the Coils

Each Motorcraft DG-511 coil is held by a single 8mm bolt. Remove the bolt, then pull the coil straight up with a slight rotation. Inspect each boot for cracks or carbon tracking — replace any damaged coil.

5. Remove the Old Plugs

Use the 5/8 in spark plug socket with a 6-inch extension. Counterclockwise. Thread out by hand once loose. Photograph each plug's condition — gray/tan is normal; black sooty indicates rich; white/blistered indicates lean or overheating.

6. Check the Plug Wells

Look into each well with a flashlight before installing new plugs. Any water, oil, or debris must be cleared first.

7. Install the New Plugs

Confirm the SP-520 gap is 0.032 in. Thread in by hand until finger-tight. Torque to 13 lb-ft (18 Nm). Trust the spec — 13 lb-ft into an aluminum head is correct.

8. Reinstall the Coils

Apply a small dab of dielectric grease inside each coil boot. Press each DG-511 coil over its plug until fully seated. Reinstall the 8mm bolt (approximately 5–7 Nm). Reconnect each electrical connector until it clicks.

9. Start and Verify

Reinstall the engine cover. Start the engine — it should idle smoothly. A misfire code (P030X) means a coil connector isn't fully seated. Shut off and recheck.

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EcoBoost Notes

The 2.0L EcoBoost's higher cylinder pressure makes overtightening the real risk here — worn iridium plugs on a turbocharged engine accelerate ignition coil wear. Don't delay the 60K service. For the EcoBoost truck platform, see the 2021 Ford Ranger 2.3L EcoBoost oil change guide.

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