How to Check for Engine Wear on a Used Car

Engine wear is a major concern for used car buyers. It can lead to decreased performance, fuel economy, and reliability. Fortunately, there are a few simple steps you can take to check for engine wear before you buy a used car.

1. Check the oil level and condition

The oil level should be between the “full” and “add” marks on the dipstick. The oil should also be clean and free of debris. If the oil is low or dirty, it could be a sign of engine wear.

2. Listen for unusual noises

When you start the car, listen for any unusual noises, such as knocking, ticking, or grinding. These noises could be a sign of engine wear.

3. Check the exhaust smoke

The exhaust smoke should be clear and free of blue or black smoke. Blue smoke indicates that the engine is burning oil, which could be a sign of piston or valve wear. Black smoke indicates that the engine is running rich, which could be a sign of fuel injector or carburetor problems.

4. Have a compression test performed

A compression test measures the amount of compression in each cylinder. A low compression reading in one or more cylinders could be a sign of engine wear.

5. Have a leakdown test performed

A leakdown test measures the amount of air that leaks out of each cylinder. A high leakdown rate in one or more cylinders could be a sign of engine wear.

6. Check the vehicle history report

The vehicle history report will show you if the car has been in any accidents or had any major repairs. This information can help you to assess the overall condition of the car.

7. Get a professional inspection

If you’re not comfortable checking for engine wear yourself, you can have a professional inspection performed. A mechanic will be able to check for engine wear and other potential problems.

By following these steps, you can help to ensure that you buy a used car with a healthy engine.