When you go to buy a used car, it’s important to make sure that you know what you’re buying. Prices vary considerably, and there’s often good reason. Two cars that look similar on the outside can be very different on the inside. Here are 6 tips to make sure the used car you’re buying has a good motor:1. Make sure the motor runs smoothly. Do you hear any knocking or strange noises? If you do, don’t buy.2. Look at the spark plugs. Take at least one wire off and look for oil or burn marks. If you see damage, beware.3. Take a long enough test drive. When you do this, you will let the engine get up to a normal temperature. Watch the gauges and make sure they stay normal. Look for any warning lights that come on. Doing this can save you a lot of trouble. If warnings go off, you know you’re looking at a car that needs some work.4. Put the hood up and take a look at the motor while it’s running. Is there anything unusual (like oil spurting)? That sounds obvious, but you won’t know if you don’t look.5. While you have the hood up, look around completely to see if there’s anything out of the ordinary. For example, evidence of an oil or fluid leak would be cause of alarm.6. Make sure the engine starts quickly and easily. If it doesn’t, you might have an issue with an old battery, a failing ignition, or a multitude of other problems.Be sure to make use of those 6 tips when you’re buying a used car. If you do, you can be confident that you’re buying a good, dependable car. News source: CarWizard