how to fix the engine knocking sound in my Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety.
• Allow the engine to cool down before starting work.

2. Change Engine Oil and Filter

• Sub-steps:
  1. Place an oil drain pan under the oil pan.
  2. Remove the oil drain plug using a socket wrench and let the old oil drain completely.
  3. Replace the oil drain plug and tighten to manufacturer specifications (usually around 20 ft-lbs).
  4. Remove the old oil filter using an oil filter wrench.
  5. Apply a small amount of new oil to the rubber gasket of the new oil filter.
  6. Install the new oil filter, hand-tightening it only.
  7. Refill the engine with the appropriate oil type (5W-20 is typical for F-150) and check the oil level.

3. Inspect and Replace Worn Components

• Sub-steps:
  1. Remove the engine cover if necessary to access internal components.
  2. Check for wear on the timing chain/belt; replace if it shows signs of damage or slack.
  3. Inspect the rocker arms and lifters; replace any that are worn or damaged.
  4. If knocking persists, consider replacing connecting rod bearings or main bearings.

4. Reassemble and Test

• Sub-steps:
  1. Reinstall any components removed during the inspection.
  2. Reconnect the battery.
  3. Start the engine and listen for any persistent knocking sounds.