Review on 🔧 Copap Brake Fluid Bleeder with 4 Master Cylinder Brake Bleeder Adapters - 90 to 120 PSI for Enhanced SEO by Ryan Lawson

Took me a few minutes to figure out how to do this properly. If you tear off the bleed valve, the vacuum will take the path of least resistance and pull air out from under the threads of the bleed valve. I pulled the bleed holes all the way out and let the brake fluid run down the threads, which sort of sealed the threads. The rear calipers are coarsely threaded so this trick didn't work so I pulled them out and wrapped the threads in teflon tape and bam the block worked great. The refill bottle that sits upside down on the container is useless as it needs a way to aerate as it can't drain fast enough. So be careful not to suck all the fluid out of the brake reservoir. Hope that helps!