With a simple diesel engine compression test, it is possible to spot compression problems before they get worse. Here’s information on these tests and how to decide if it is time to perform one.

Also, engine compression readings can vary depending on altitude and other factors, so it is more important to compare the cylinders to each other rather than the assumed compression number.

If your car is getting older or you feel like you may be losing some engine power, a compression tester can help sort out the problem.

We walk you through a compression test, a great way to determine the condition of your valves and piston rings.

Checking a diesel engine's compression by performing a leakdown test is a more detailed method of diagnosing the powerplant's condition and determining the amount (percentage) of blow-by.