Upgrade Your Datsun 510 Brake Master Cylinder

If you are upgrading your 1968*-73 Datsun 510 to disc brakes or simply replacing your old master cylinder, Wilwood brake master cylinder is a great option. This unit features a 1″ bore for improved pedal feel and also has a heat shield which helps keep brake fluid cool even under harsh driving conditions.

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Brake Pedal Feel

When you brake, the master cylinder’s fluid pressure pushes into the lines feeding calipers and drums, activating their piston so brake pads are squeezed between rotor and drum.

Your brake pedal can tell you a lot about the condition of your brakes, including whether they require replacement. If it feels spongy or soft, air could be entering into the brake line or the master cylinder needs filling with fresh fluid.

One of the most essential parts of any brake system is the master cylinder, and getting the right size can make all the difference in how your car feels when you step on the pedal. Chase Bays offers master cylinders designed and tested for excellent pedal feel without over-aggressive braking.

This Datsun 510 brake kit includes the master cylinder, steel braided brake lines, Wilwood calipers, rotors, hats and hardware for an easy bolt-on installation. Plus it includes a firewall brace to reduce firewall flex during hard braking and improve overall pedal feel.

Brake Fluid Temperature

The brake master cylinder is an integral part of your vehicle’s braking system, transferring hydraulic pressure from your foot to the brake calipers that clamp down on rotors to stop you.

The master cylinder is composed of three parts: a piston, pushrod and spring. The piston moves fluid from the master cylinder to your brake lines, which transport it to all four wheels.

Modern master cylinders feature two brake lines, one for each wheel. This way, if one line leaks you still have the other to keep your brakes functioning optimally.

The master cylinder’s primary challenge is keeping brake fluid from boiling over while driving. If left unchecked, your pedal could become soft and potentially result in complete brake failure. To protect against overheating, Lava Master Cylinder Heat Shield is the solution: this patented thermal barrier material withstands 1,200 degrees F of continuous heat while being resistant to corrosive fluids like brake fluid.

Brake Lines

Brake lines run from the master cylinder to each caliper, carrying brake fluid so that when you press on your pedal it pushes against the caliper.

Old rubber hoses will expand under pressure and stretch, decreasing braking performance by making your pedal feel spongy. New stainless steel braided brake lines eliminate this weakness by offering a firmer feel and more predictable braking.

Selecting the ideal brake line for your vehicle’s braking performance is an essential decision that can make all the difference. There are a variety of options to consider when making this selection.

Goodridge G-Stop high performance race-bred street brake lines feature a PTFE inner hose enclosed by stainless steel overbraid to offer more responsive pedal feel and reduce sponginess. They also reduce stopping distances, are abrasion resistant for extended life and eliminate sponginess.

Although bending bulk line is less complex than flaring it, both require patience and skill to produce an end result that’s safe, efficient and attractive. Plan out your bends ahead of time using a baling wire or welding rod as a guide.

💥See also: What is a Brake Master Cylinder?


The brake master cylinder is an essential element of your vehicle’s brake system. It stores brake fluid, and any leak could render your vehicle unable to stop quickly and effectively.

Typically, the brake master cylinder is located beneath the brake fluid reservoir. You can identify it by its threaded cap on top.

Replacing a master cylinder in your vehicle is relatively straightforward if you follow the instructions in your owner’s manual. Before taking out the old master cylinder, be sure to disconnect and discard its brake fluid level sensor as well.

Once you have taken out the brake fluid level sensor, it is time to take apart the master cylinder by hand. The mounting bolts for this are usually located at the back of the brake master cylinder.

📢Read also: 4 Wheel Disc Brake Master Cylinder

Install the new master cylinder by connecting its bleeder nipples to each chamber of the cylinder. Fill with brake fluid, and then pump it with someone holding a container under its nipples until no air bubbles can be seen in the clear hoses – this will “prime” the cylinder and purge any air that might exist in your brake system.

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