- Oil Leak: Check for any visible oil leaks around the engine, especially near the valve cover gasket, oil pan gasket, or rear main seal. Worn or damaged seals can cause oil to leak and burn, resulting in the smell and increased coolant temperature.
- PCV Valve: A faulty Positive Crankcase Ventilation (PCV) valve can cause excessive pressure in the crankcase, leading to oil leaks and burning. Check the PCV valve for proper functioning or replace it if necessary.
- Piston Rings: Worn or damaged piston rings can allow oil to seep into the combustion chamber and burn. This can cause the burnt oil smell and potentially lead to increased coolant temperature due to reduced engine efficiency.
- Head Gasket: A blown or leaking head gasket can allow coolant to enter the combustion chamber and mix with oil. This can result in the burnt oil smell and increased coolant temperature due to reduced cooling efficiency. Check for signs of coolant contamination in the oil or oil in the coolant reservoir.
- Catalytic Converter: A damaged or clogged catalytic converter can cause increased exhaust gas temperatures, which can lead to increased coolant temperatures. Check the condition of the catalytic converter and replace it if necessary.
Recommendation:
It is essential to have the vehicle inspected by a qualified mechanic to accurately identify the source of the burnt oil smell and increased coolant temperature. Some of these issues can be complex and may require specialized tools or expertise to properly diagnose and repair.
