LEAK DOWN TEST: WHAT IS IT AND HOW TO DO IT
here are two types of compression tests for engines. The regular engine compression test uses a single gauge and measures the maximum instantaneous compression built by that cylinder. A compression test uses the engine turning to generate the compression in the cylinder for the compression stroke, in which both intake and exhaust valves are closed. A leak down test uses a set of gauges and pressurizes the cylinder with air and measures how much of that air is escaping. WHAT I
What's More Important When Buying a Car: Miles or Age?
In the world of used cars, two factors seem to have a major effect on pricing: mileage and age. An 8-year-old car is usually less expensive than a 2-year-old car, for instance, while a 100,000-mile car is normally less expensive than a 20,000-mile car. But what about a 2-year-old car with 100,000 miles? Or an 8-year-old car with only 20,000 miles? If you're buying a car, should you be more concerned about its miles or its age? We have the answers. Mileage Matters If you're bu