Flushing your complete coolant system may be necessary if you put the wrong type of coolant in your radiator, if you are welding the block or if you want to drain the coolant system to replace it with more potent coolant for the winter months. Flushing all the coolant out of a Toyota Tundra is a standard, straightforward process that you can perform in your own garage.
Park the truck on a flat spot. Allow the truck and coolant to cool for an hour. Pop the hood and unscrew the coolant cap.
Lay under the engine of your Toyota Tundra. Unscrew the four bolts holding the plastic skid protector to the frame under the engine. Remove the plastic skid protector.
Position the bucket under the driver side of the radiator. Unscrew the drain plug bolt on the base of the radiator located on the driver side. Allow all the coolant to run out.
Locate the three-inch-diameter hose between the base of the radiator and the base of the engine block. Unscrew the clamp holding the hose to the engine block. Position the bucket under the hose. Pull the hose off and allow any coolant in the hose or engine block to drip into the bucket. Reattach and tighten the hose. Screw the drain plug back into the radiator.
Replace the plastic skid protector under the engine.
