why is there a knocking sound coming from my Honda CR-V's engine

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, mechanic's stethoscope, compression tester, long screwdriver.
• Safety Warnings: Disconnect the battery before working on electrical systems. Allow the engine to cool before opening any components.

2. Change Engine Oil and Filter

• Sub-steps:
  1. Raise the vehicle using jack stands and secure it.
  2. Remove the oil drain plug and drain the old oil into a container.
  3. Replace the oil filter using an oil filter wrench.
  4. Reinstall the drain plug and torque it to the manufacturer's specifications.
  5. Fill the engine with new oil, following the manufacturer's recommended oil type and capacity.

3. Replace Worn Components

• Sub-steps:
  1. Identify the source of the knocking sound (e.g., rod bearings, timing chain, or valve lifters).
  2. If necessary, remove the engine oil pan to access the connecting rod bearings.
  3. Replace any worn or damaged bearings and reassemble the engine.
  4. If the timing chain or belt is the issue, follow the manufacturer's procedure for removal and replacement.

4. Reassemble and Test

• Sub-steps:
  1. Reinstall any components removed during the repair process.
  2. Reconnect the battery and start the engine.
  3. Monitor for any abnormal sounds or warning lights.