Review on Dorman M630360 Brake Master Cylinder by Mike Bonilla

Seat bled and installed correctly. A complete bleed of 4 wheels was also performed to replace all the fluid in the brake lines. After doing all this work, I found that the block was faulty and had worse internal leakage than the block it replaced. They replaced it with a device from another manufacturer without any problems. I am very surprised that such a problem has occurred with a Dorman product. Revain doesn't list a warranty period and I can't afford to wait for replies from Revain without a car so I had to consider it a waste and a waste of money. Based on my experience I would NOT recommend purchasing this Dorman brand master cylinder.