Review on 💪 Enhanced Universal R134A Valve Core Remover/Installer by Mastercool (81290) by David Caldwell

It is used to service high and low pressure switch ports on Ford Superduty trucks. Assuming there is no charge left in the system, remove the pressure sensors and use this tool to remove the valve cores. This solves some of the mysterious AC leaks. tire tool. You probably only used one side of this (same as one side of this Mastercool puller) to remove the tire valve stems. Well, the tip of the four-way tool has left-hand threads, so screw it in counter-clockwise as far as it will go and pull out the broken core. It is only held in place by the friction of the lower o-ring.