Review on Thorstone No Spill Coolant Funnel Kit: Spill-Free Radiator Filling & Antifreeze Bleeding for Universal Vehicles by Gary Perry

I should have bought this sooner! Easy to use and clean. That's how I work. Hope this is helpful. Before: Make sure your expansion tank is at the coolant level where the line marked "COLD" is, make sure your car is cold, do not attempt this with the engine running. 1. Attach a funnel to open the radiator cap when cold, and fill the funnel about 1/4 full so that when the system is burped, the liquid goes into the system and not into the air. thermostat and turn on the fans. 3. After the bubbles stopped, I put the stopper in the funnel and used the rest to fill up the overflow tank. More details are in the product description, maybe it will help. Anyway, highly recommend this item for your next coolant flush.👍