why does my Ford Mustang S550 (2015-2023) have a knocking sound on startup

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on the vehicle.
• Tools Required: Socket set, torque wrench, OBD-II scanner, engine oil dipstick, compression tester.

2. Change Engine Oil

1. Drain the old engine oil:

   • Place a drain pan under the oil pan.
   • Remove the oil drain plug and allow the oil to completely drain.
   • Reinstall the drain plug and torque to manufacturer specifications (typically around 20 lb-ft).

2. Replace the oil filter:

   • Use an oil filter wrench to remove the old filter.
   • Apply a thin layer of new oil to the gasket of the new filter.
   • Install the new filter and tighten it according to the manufacturer’s specifications (usually hand-tight plus 3/4 turn).

3. Add new engine oil:

   • Fill the engine with the recommended type and amount of oil (typically 5W-20 for Mustang).
   • Start the engine and let it idle for a few minutes, then check the oil level and add more if necessary.

3. Inspect and Replace Engine Mounts (if necessary)

1. Lift the vehicle using a jack and secure it with jack stands.
2. Remove any components obstructing access to the engine mounts, such as the air intake duct.
3. Inspect engine mounts for cracks or wear; if damaged, remove the bolts securing the mount to the chassis and engine.
4. Replace with new engine mounts, ensuring they are torqued to specifications.

4. Inspect Timing Components

1. Remove the timing cover by unscrewing the bolts and gently prying it off.
2. Check the timing chain or belt for signs of wear or misalignment.
3. If the timing component is worn, replace it according to manufacturer specifications, ensuring proper tension and alignment.