1. PCV System:
- Check that the PCV valve and hose are properly seated and not obstructed. Ensure the PCV system is functioning correctly by creating a vacuum at the valve port. If the system is functioning correctly, proceed to step 2.
2. Valve Cover Gasket:
- This gasket is located beneath the valve cover and can leak oil. Check for signs of oil seepage around the valve cover area. If the gasket is damaged or leaking, replace it.
3. Oil Filter:
- Check to ensure that the oil filter is properly installed and not leaking. If the filter is loose or incorrectly seated, oil may leak, causing smoke. Replace the oil filter if necessary.
4. Oil Pan Gasket:
- The oil pan gasket is located at the bottom of the engine and can leak oil if damaged or worn out. Check for oil dripping from the underside of the car. If the gasket is damaged, replace it.
5. Rear Main Seal:
- The rear main seal is located where the crankshaft exits the engine block. Check for oil leaks around the seal. If the seal is leaking, replace it.
6. Exhaust Manifold Gasket:
- This gasket is located between the exhaust manifold and the engine block. A damaged or leaking exhaust manifold gasket can cause smoke and a burnt oil smell. Check for signs of leaking exhaust gas around the manifold area. Replace the gasket if necessary.
7. Turbocharger (if equipped):
- If your Mercury Topaz has a turbocharger, inspect the turbocharger seals for leaks. If you find evidence of oil leaks coming from the turbo, you may need to have the turbo seals replaced or the entire turbocharger unit.
Note: If the smoke persists despite addressing these potential causes, it is advisable to have your vehicle inspected by a qualified mechanic to identify and resolve the underlying issue.
