my Toyota Camry Eighth Generation (2018-present) has a knocking sound when idling what's the cause

Solution

1. Preparation

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

2. Inspect Engine Oil

• Remove the oil dipstick and wipe it clean.
• Reinsert dipstick and remove to check oil level; add oil if low (SAE 0W-20 recommended).
• If oil is contaminated or old, proceed to oil change.

3. Change Engine Oil and Filter

• Tools Required: Oil filter wrench, socket set, oil catch pan.
• Remove the oil drain plug using a socket wrench and drain the old oil into the catch pan.
• Replace the oil filter with a new one, ensuring the rubber O-ring is lubricated with new oil.
• Reinstall the drain plug and torque to manufacturer specifications (typically around 30 lb-ft).
• Fill the engine with new oil through the oil filler cap.

4. Check Engine Mounts

• Inspect the engine mounts visually for cracks or signs of wear.
• If damaged, use a socket set to remove the bolts securing the engine mount and replace it with a new mount.

5. Compression Test (if knocking persists)

• Tools Required: Compression gauge.
• Remove the spark plugs using a spark plug socket.
• Insert the compression gauge into each cylinder and crank the engine to measure compression.
• Compare readings against manufacturer specifications to identify any discrepancies.