Review on 🔧 Dorman M39842 Brake Master Cylinder: Your Ultimate Solution for Reliable Braking Performance by Mark Bullock

Includes plastic screw plugs which I used as vent plugs. I clamped it in a vise, filled the reservoir and pumped about 75-100 times, a bubble coming out with each compression. Installed on the car and one of the brake line connectors was at a slightly different angle than standard so I had to be very careful not to cut the threads. With brake line nuts, it's helpful to use a small feeler gauge to tighten the wrench so you don't round the edges of the nut. Bleed the brakes on all four wheels and the brake pedal problem hits the floor.