1. Oil Filter: Check if the oil filter is clogged or damaged. A clogged oil filter can restrict oil flow and cause the oil pressure to rise.
2. Oil Pump: The oil pump may be faulty or damaged, leading to high oil pressure. Check for leaks or damage to the oil pump and its gears.
3. Oil Pressure Relief Valve: The oil pressure relief valve may be stuck or malfunctioning, preventing the oil pressure from being regulated.
4. Main or Rod Bearings: Worn or damaged main or rod bearings can cause a knocking noise and high oil pressure. Check the condition of these bearings.
5. Hydraulic Lifters: If the vehicle has hydraulic lifters, they might be faulty or damaged, causing a knocking noise and affecting oil pressure.
6. Pistons or Piston Rings: Excessive wear or damage to the pistons or piston rings can create knocking noises and affect oil pressure.
7. Crankshaft: A worn or damaged crankshaft can also cause knocking noises and high oil pressure.
8. Oil Viscosity: Using oil with the wrong viscosity can lead to high oil pressure. Ensure you are using the correct oil specified by the manufacturer.
It is important to identify the exact source of the knocking noise and high oil pressure to determine the appropriate repair. Consulting a professional mechanic or automotive technician is recommended to diagnose and address the issue accurately.
