Since the advent of the hydraulic brake system, “bleeding” the system is a necessity. We show you how to properly bench bleed a master cylider, the right way.

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During brake bleeding, the master-cylinder cap should be left unscrewed but still in place atop the reservoir. Each brake must be bled in the correct sequence.

If you've changed the clutch master or slave cylinder, changed the fluid, or replaced the lines, you have to expel the air from the system before your clutch will work properly.

You can bench-bleed your master cylinder using brake hydraulic lines or by purchasing a master cylinder bench bleeding kit from a local auto parts store.

Learn how to install a master cylinder the proper way by making sure you bench bleed it and get all the air out first.