my Honda Civic 9th Generation (2012-2015) engine makes a knocking noise what should I do

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical issues during repair.

2. Engine Oil Change

• Sub-steps:
  1. Place an oil drain pan under the oil pan.
  2. Remove the oil drain plug using a socket wrench and allow old oil to drain completely.
  3. Replace the oil drain plug with a new washer and torque it to manufacturer specifications.
  4. Remove the old oil filter using an oil filter wrench and install a new oil filter, applying a thin layer of oil to the rubber O-ring.
  5. Refill the engine with the recommended oil type and quantity.

3. Inspect and Replace Components

• Sub-steps:
  1. If compression test results indicate low pressure, remove the cylinder head.
  2. Inspect piston rings and cylinder walls for wear or damage; replace as necessary.
  3. Check for any damaged timing chain/belt components and replace them if required.
  4. Reassemble the engine components, ensuring all bolts are torqued to specifications.

4. Valve Adjustment

• Sub-steps:
  1. Remove the valve cover.
  2. Use a feeler gauge to check the clearance of each valve and adjust as necessary according to specifications.
  3. Reinstall the valve cover with a new gasket to prevent leaks.