How to change antifreeze in 1998 Chevy Astro van?

Answer 1

fairly simple, using a catch pan open the drain petcock on the bottom of the radiater and let the coolant flow out, I like to flush it pretty well so I run a garden hose in the open radiator cap, start the engine, and let the thermostat open and close 3 or 4 times until what comes out the petcock is mostly clear, you can run a radiator flush product in there prior to doing this is yours is getting clogged. Then start with 1 gallon of straight antifreeze ( you already have 1 gallon of water inside the engine to mix, then add premixed coolant until its full, fill up the reservoir and run the vehicle. Check several times after using the car until it does not use up the reservoirs contents, there should always be coolant in there up to the fill line.