If removing the shield involves removing other parts that may be damaged in the process, have a professional check the compression for you. Here's how to use a compression gauge: 1.

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.

The guys at Muscle Car Review show you how to check engine compression with the latest tools. Check it out only at hotrod.com or the October 2011 issue of Muscle Car Review Magazine.