Swapping to a larger cam? Learn how to change your valve springs with the heads on or off the engine.

Once the installed height has been established you can use a spring pressure tester to determine the state of the springs. Obviously, this method of monitoring spring life by comparing pressures ...

Routine MaintenanceAnother trick is to regularly check the springs using a seat-pressure tester (inexpensive models such as the Moroso unit shown in the accompanying photo are readily available).

Read up on everything you'll need to know about choosing the right valve springs and what will work best for your Mopar. Check out details along with photos only in Mopar Muscle Magazine ...