engine
Valve Cover Gasket - Single
for 2012 Ford F-150 5.0L V8 Coyote · 4WD
Editorial review:Chris Hackleman — Master Technician · 20+ years
Difficulty
Moderate
Time
2.0 h
Tools
12
Steps
14
✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman — 20+ years each). Always follow the vehicle's factory service information and torque specs.
This procedure replaces a single valve cover gasket on the 5.0L Coyote V8 engine to eliminate oil leaks from the valve cover mating surface.
Warnings
⚠️Allow engine to cool completely before beginning work. Hot oil and components can cause severe burns.
⚠The 5.0L Coyote engine uses aluminum heads. Excessive torque on spark plugs or valve cover bolts can strip threads. Always use a calibrated torque wrench.
⚠Keep debris out of open spark plug holes and valve train area. Foreign material can cause catastrophic engine damage.
ℹ️This procedure covers one valve cover (driver or passenger side). Determine which side is leaking before ordering parts.
Tools required
10mm socket and ratchetEssential
8mm socket and ratchetEssential
Torque wrench (5-25 Nm range)Essential
Torque wrench (40-80 Nm range)Essential
Spark plug socket (16mm)Essential
Extension bars (3-inch and 6-inch)Essential
Plastic gasket scraperEssential
Brake cleaner or degreaserEssential
Clean lint-free ragsEssential
Anti-seize compoundEssential
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Parts
- Valve cover gasket kit (single side) × 1 — Motorcraft YS4Z-6584-AA or equivalent
- Spark plug tube seals × 8 — Included in valve cover gasket kit
- PCV valve grommet (if equipped on side being serviced) × 1 — Use OEM specification
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Preparation
- Ensure engine is completely cool to the touch
- Disconnect negative battery terminal to prevent accidental ignition system activation
- Identify which valve cover requires replacement (driver or passenger side)
- Remove engine cover if equipped by pulling upward on retention clips
- Clean external area around valve cover with degreaser to prevent contamination
Procedure
- 1Disconnect ignition coilsDisconnect the electrical connectors from all eight ignition coils on the affected side by pressing the release tab and pulling straight up. Remove the single bolt securing each coil using an 8mm socket, then carefully pull each coil straight out from the spark plug tube. Set coils aside in order.
- 2Remove spark plugsUsing a 16mm spark plug socket with extension, remove all eight spark plugs from the affected cylinder bank. Inspect plugs for condition and set aside. Temporarily stuff clean lint-free rags into spark plug holes to prevent debris entry.⚠Do not drop anything into the open spark plug holes. Even small debris can damage pistons or valves when the engine starts.
- 3Disconnect PCV system and harness clipsDisconnect the PCV hose from the valve cover by twisting and pulling the grommet. Release any wiring harness clips or brackets attached to the valve cover. On some configurations, the fuel rail mounting bracket may need to be loosened but not removed.
- 4Remove valve cover boltsRemove the ten valve cover bolts in a crisscross pattern starting from the outer bolts and working inward using a 10mm socket. Keep bolts organized as some may be different lengths. Note the bolt sequence for reinstallation.Torque specValve Cover Bolts10 Nm (7 lb-ft)
- 5Remove valve coverCarefully lift the valve cover off the cylinder head. It may require gentle side-to-side rocking if the gasket is stuck. Do not pry between the cover and head surfaces as this can damage the sealing surfaces. If stuck, tap lightly on the cover edges with a rubber mallet.
- 6Remove old spark plug tube sealsUsing a spark plug socket or appropriate tool, carefully extract all eight old spark plug tube seals from the valve cover. These are press-fit and may require twisting while pulling. Remove any remaining pieces from the spark plug tubes in the cylinder head.⚠Ensure all pieces of old tube seals are removed. Leftover fragments can fall into cylinders or prevent proper new seal installation.Torque specSpark Plug Tube Seals12 Nm (9 lb-ft)
- 7Clean mating surfacesRemove all old gasket material from both the valve cover and cylinder head mating surfaces using a plastic scraper. Clean surfaces thoroughly with brake cleaner and lint-free rags. The surfaces must be completely clean, dry, and free of oil or debris. Inspect for damage or warping.⚠Do not use metal scrapers on aluminum surfaces. Cover open valve train area with rags while scraping to catch debris.
- 8Install new spark plug tube sealsPress new spark plug tube seals into the valve cover by hand or using a spark plug socket until fully seated. Apply a light coating of engine oil to the outside of each seal before installation. Ensure all eight seals are flush and properly seated in their bores.Torque specSpark Plug Tube Seals12 Nm (9 lb-ft)
- 9Install new valve cover gasketPosition the new valve cover gasket onto the valve cover. Most gaskets have integrated grommets and will snap into place in the cover. Ensure the gasket is fully seated in all locations and properly oriented. Install new PCV valve grommet if applicable.
- 10Install valve coverRemove protective rags from spark plug holes. Carefully position the valve cover with new gasket onto the cylinder head, ensuring all bolt holes align and spark plug tube seals enter their respective tubes. The cover should sit flat without forcing.ℹ️Ensure no wiring or hoses are pinched between the valve cover and cylinder head.
- 11Install and torque valve cover boltsHand-thread all ten valve cover bolts, ensuring proper bolt length in each location. Tighten bolts in the factory sequence (start at center, work outward in a spiral pattern) to 10 Nm (7 lb-ft) using a calibrated torque wrench. Do not over-torque as this can damage the gasket and cause leaks.⚠Torque specification is critical. Over-torquing will compress the gasket excessively and cause leaks. Follow proper tightening sequence.Torque specValve Cover Bolts10 Nm (7 lb-ft)
- 12Reinstall spark plugsApply a small amount of anti-seize compound to the spark plug threads (avoid getting any on the electrode or tip). Thread each spark plug by hand into its respective hole to prevent cross-threading. Torque all spark plugs to 20 Nm (15 lb-ft) using a torque wrench.⚠Always hand-start spark plugs first. Cross-threading will destroy aluminum cylinder head threads requiring expensive repair.
- 13Reinstall ignition coilsApply a thin coat of dielectric grease to the inside of each ignition coil boot if desired. Install each coil into its spark plug tube, ensuring it seats fully onto the spark plug. Install and torque the coil mounting bolt to 8 Nm (6 lb-ft). Reconnect all eight coil electrical connectors.
- 14Reconnect accessories and batteryReconnect the PCV hose to the valve cover grommet. Reattach any wiring harness clips or brackets that were removed. Tighten any fuel rail mounting brackets to 59 Nm (44 lb-ft) if they were loosened. Reconnect the negative battery terminal. Reinstall engine cover if equipped.
Reassembly
- Double-check that all electrical connectors are fully seated and locked
- Verify no tools or rags were left in the engine compartment
- Ensure PCV system is properly connected and sealed
Verification
- Start the engine and listen for any unusual noises or misfires
- Allow engine to reach operating temperature and inspect valve cover for oil leaks
- Check for proper idle quality - rough idle may indicate disconnected ignition coil or vacuum leak
- After initial test run, recheck valve cover bolt torque when engine is cool
- Monitor for leaks over the next several days of driving