To properly and completely drain and fill the the coolant on our 1st generation Toyota Tacoma, it is necessary to replace the coolant in both the radiator and the engine. This requires emptying out the coolant in two locations and refilling accordingly. The 1st generation Tacoma has a variety of configurations that can make the coolant capacity slightly differ from one model to the next.

The coolant (or antifreeze) in a vehicle plays a significant part of the vehicle’s operation. It was about time for my 2003 Toyota 4Runner to have its coolant drained, flushed, and replaced. I’ve outlined the steps I took to do this and also provided an alternative way of replacing antifreeze that might be a bit easier to do.