Review on Universal Black A/C Valve Core Remover/Installer by MASTERCOOL - Model 58490 by Russ Freeman

This worked great and saved me time and money from having to completely evacuate the HVAC system. The build quality of this kit is much better than most. I will definitely recommend it to my friends who do similar jobs. I recommend doing a test run with a valve stem swap to get a feel for how it works. That way you can also make sure the rod gets clean before you remove the old one. tool back. If this happens don't panic as most likely the bar is still in place at the bottom and all you have to do is push the tool back down and line it up with the bar again so you can detach it. Once the shank disengages, slowly raise the tool and then close the ball valve. You should have the old stem so you can put the new one back in. Also, for people who say it doesn't work with Ford's high stem pressure, this certainly fits, but I will say that the receiving chamber (the space between the ball valve and the stem removal tool) is a bit tight to close facilitate ball valve. This is the only complaint about this kit. What you need to do is use the second largest tool as it will hold the stem without dropping it and this tool is short enough to close the ball valve. If you try to use the largest, it won't hold the stem and the ball valve won't be able to close.