Curious to learn just how healthy or unhealthy your engine is? Get yourself a compression tester and find out. See the best compression testers here.

Testing compression, a relatively simple task, is made even easier with the proper mix of current test equipment. We used Actron's Professional Compression Tester along with Actron's heavy-duty ...

We test four shocks on a shock dyno for compression and rebound comparisons.

The more compression and rebound, the less the damper is going to allow movement of the spring, and the less movement, the more stable the car is in harsh conditions.

While an engine compression tester may not be the most common tool in a mechanic's garage, they can be very useful, especially for older cars.