1. Engine Knocking: A knocking sound coming from the engine is a classic sign of worn-out engine components, such as bearings or piston rings.
2. Loss of Power: If you notice a significant decrease in power or performance, it could be a sign of engine issues.
3. Excessive Oil Consumption: If you need to add oil more frequently than usual, it could indicate worn out piston rings or seals, leading to oil loss.
4. Engine Overheating: Consistent overheating can be a sign of a failing cooling system or engine issues, such as a blown head gasket.
5. Check Engine Light: The Check Engine Light (CEL) is a warning indicator that the engine is experiencing a problem. It could be related to various engine components or sensors.
6. Blue or Black Exhaust Smoke: Blue smoke typically indicates oil burning in the engine, while black smoke can be a sign of excessive fuel or worn-out engine components.
7. Rough Idle: A rough or uneven idle can indicate various engine problems, including fuel injection issues or engine wear and tear.
8. Stalling or Difficulty Starting: If your Blazer stalls frequently or has difficulty starting, it could be a sign of engine problems, such as faulty ignition components or fuel delivery issues.
9. Oil or Coolant Leaks: Any visible leaks of oil or coolant should be taken seriously as they can indicate problems with the engine's seals or gaskets.
10. Reduced Fuel Efficiency: If you notice a sudden decrease in fuel efficiency, it could be a sign of engine problems affecting fuel consumption.
It's important to pay attention to these signs and have your vehicle inspected by a qualified mechanic or automotive technician if you suspect any issues with the engine. Early detection and timely repairs can help prevent further damage and costly repairs.