This procedure covers the replacement of a single Variable Valve Timing (VVT) solenoid on the 3.5L EcoBoost V6 engine, typically performed to resolve timing-related fault codes or engine performance issues.

Warnings

Tools required

Parts

• VVT solenoid (specify intake or exhaust, left or right bank) × 1 — Use OEM Ford part number for specific bank/position
• VVT solenoid O-ring/seal × 1 — Usually included with solenoid

Fluids

• Motorcraft 0W-20 Full Synthetic — 0.25 qt

Preparation

1. Ensure engine is completely cool to the touch
2. Disconnect negative battery terminal and wait 2 minutes for system capacitor discharge
3. Identify which VVT solenoid requires replacement (left/right bank, intake/exhaust position) based on fault codes
4. Position vehicle on level ground with parking brake applied
5. Remove engine cover by pulling upward on front clips and lifting off

Procedure

1. 1

   Access the VVT Solenoid
   Depending on solenoid location, you may need to move wiring harnesses or remove plastic harness retainers. For right bank solenoids, access is typically easier. For left bank (driver side), you may need to move the air intake tube or other components for better access. Use plastic trim tools to release any harness clips blocking access to the target solenoid.
2. 2

   Disconnect Electrical Connector
   Locate the electrical connector on the VVT solenoid. Press the locking tab and pull the connector straight off the solenoid. Inspect the connector terminals for corrosion or damage. If the connector is difficult to remove, use a pick tool to release the secondary lock if equipped.
3. 3

   Remove VVT Solenoid Mounting Bolt
   Using an 8mm socket, remove the single mounting bolt securing the VVT solenoid to the cylinder head or timing cover. Place the bolt in a clean area for reinstallation. Note the bolt length and any washers present.
   Torque spec

   VVT Solenoid Bolt10 Nm (7 lb-ft)
4. 4

   Extract VVT Solenoid
   Grasp the solenoid body firmly and pull straight out from the cylinder head bore. The solenoid may require moderate force to overcome O-ring seal resistance. Twist slightly while pulling if needed. Expect 1-2 tablespoons of engine oil to drain from the bore. Have shop towels positioned to catch oil.
   ⚠Do not rock or tilt the solenoid excessively during removal as this can damage the solenoid bore sealing surface.
5. 5

   Inspect Solenoid and Bore
   Examine the old solenoid screen filter for debris or metal particles, which may indicate internal engine problems. Inspect the O-ring for damage. Use a shop light to look into the solenoid bore for debris, sludge, or metal shavings. If excessive contamination is present, investigate oil system condition before proceeding.
6. 6

   Clean Solenoid Bore and Mating Surface
   Use a clean shop towel and brake cleaner to thoroughly clean the solenoid mounting surface on the cylinder head or timing cover. Remove all old oil residue. Do not allow debris to fall into the solenoid bore. If the bore is contaminated, carefully clean with brake cleaner and compressed air, directing air away from internal engine passages.
7. 7

   Prepare New VVT Solenoid
   Remove the new solenoid from packaging. Verify it matches the old solenoid configuration exactly. Inspect the new O-ring seal and ensure it is properly seated in the solenoid groove. Lightly coat the O-ring with clean 0W-20 engine oil to ease installation and prevent seal damage.
8. 8

   Install New VVT Solenoid
   Align the new solenoid with the bore, ensuring proper orientation. The electrical connector should face the same direction as the original. Push the solenoid straight into the bore until it seats fully against the mounting surface. The solenoid should sit flush without gaps.
   ⚠Do not force the solenoid. If resistance is encountered, remove and check for O-ring damage or debris in the bore.
9. 9

   Install and Torque Mounting Bolt
   Install the VVT solenoid mounting bolt and hand-tighten. Using a torque wrench and 8mm socket, torque the bolt to specification in a single smooth motion. Do not overtighten as this can crack the solenoid housing.
   Torque spec

   VVT Solenoid Bolt10 Nm (7 lb-ft)
10. 10

    Reconnect Electrical Connector
    Push the electrical connector onto the VVT solenoid until it clicks into place. Verify the locking tab is fully engaged. Gently tug on the connector to confirm it is secured. Reinstall any wiring harness clips or retainers that were removed for access.
11. 11

    Reinstall Engine Components
    Reinstall any components removed for access, such as air intake tubes, wiring harness brackets, or engine covers. Ensure all clips and fasteners are properly secured. Reinstall the main engine cover by aligning the rear grommets first, then pressing down on the front clips until they snap into place.
12. 12

    Reconnect Battery and Clear Codes
    Reconnect the negative battery terminal. Start the engine and allow it to idle. The engine may run slightly rough for 10-15 seconds while the PCM relearns VVT parameters. Use a diagnostic scanner to clear any stored VVT-related fault codes and verify no new codes are present.

Reassembly

1. Verify all electrical connectors are fully seated and locked
2. Confirm engine cover and any removed components are properly reinstalled
3. Check for any tools or parts left in engine bay before closing hood

Verification

• Start engine and verify smooth idle with no unusual noises or rattles from timing system
• Scan for diagnostic trouble codes - VVT codes should be cleared and not return
• Perform a test drive and verify normal engine performance with no hesitation or rough running
• Check around the solenoid installation area for any oil leaks after engine reaches operating temperature
• Re-scan for codes after test drive to confirm repair success

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