Toyota Tundra 2000-Present: How to Change Coolant

Keep reading to learn how to replace the coolant in the Toyota Tundra in a few simple steps.

By Bassem Girgis - January 26, 2016

This article applies to the Toyota Tundra (2000-present).

The coolant in your Toyota Tundra's radiator is what keeps your truck's engine cool. Replacing it ensures the engine continues to remain cool under heavy use. If you don't remember the last time you've replaced your engine coolant, then it wouldn't hurt to replace it now. The process isn't difficult and can be done quickly. Whether you tow, drive under rough conditions, or just drive it to work everyday, keeping your engine cool means keeping your truck going for years to come. Read on to learn how to replace your coolant.

Materials Needed

  • Drain pan
  • Turkey baster
  • Coolant

Step 1 – Drain old coolant

To drain the old coolant, open the radiator cap, then place the drain pan under your radiator's drain plug. Loosen the drain plug with your fingers by turning it counter clock-wise. Let the coolant drain completely.

Drain plug on the right bottom side of radiator if you're facing the truck
Figure 1. Drain plug on the right bottom side of radiator if you're facing the truck.

Step 2 – Fill with new coolant

Make sure the drain plug is closed on the bottom of the radiator, then fill the radiator with 50/50 coolant until it reaches the top.

Fill radiator with coolant
Figure 2. Fill radiator with coolant.

Step 3 – Start truck, then refill

Start the truck and let it run for a few seconds, then check the coolant's level again. It will most likely be lower; add more coolant until it reaches the top.

Add coolant as needed
Figure 3. Add coolant as needed.

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