Review on 🔧 Improved DAYUAN 28-Piece Universal Radiator Pressure Tester & Vacuum Cooling System Kit by Scott Gamache

Great tool! I mainly use it on bikes because of the tight spots around the radiator cap and some bikes have been known to get air stuck in the system without making a few attempts at burping and refilling. , all air is pumped out and replaced only by refrigerant (overheating from air pockets is not a pleasant experience). My only caveat with this system is that I recommend removing each connection and wrapping it with Teflon tape to ensure the connections don't leak over time. I also replaced one of the valves with something more durable. If you do eventually notice a loss of vacuum pressure, I recommend trying a few things before calling this tool junk. Install the tool as usual, attaching the heatsink adapter cap to the blue line, but instead of attaching it to the heatsink, simply place your thumb over the hole. Open the air supply to the compressor and open the valve, creating a vacuum. The pressure gauge should rise whenever you can close the valve and stop creating a vacuum. If the gauge holds vacuum with a finger over the hole the tool is still working properly, if not then vacuum is leaking through the tool through one of the ports. Correct it before proceeding.2. After verifying that the tool can draw and hold vacuum on its own and that you have fitted the correct radiator cap to the system (particularly on motorcycles) ensure that the fairings/body are not putting pressure on the lines. Simply squeezing the connection can allow a vacuum to escape and convince you that the system or tool is faulty.3. While building vacuum, slowly open the coolant supply line to allow the coolant to reach the top of the valve, then close it again and continue to draw vacuum. This is to ensure that when refilling, no air is sucked back into the system before the coolant has been removed. Finally, I used a manual coolant pump to help me find bad seals in the bike's rebuilt water pump. I applied pressure and coolant immediately spurted out, letting me know the seals had failed. Without this tool I would probably rack my brains and replace unnecessary parts trying to find the problem! I've already built about 6 bikes with this tool and this is now my favorite method of topping up or testing coolant systems. Happy repair! Everyone! :-)