On the 3rd-gen Tacoma this is one of the easier fluid jobs. There is a plastic drain cock at the lower driver's corner of the radiator, and the only real wrenching is pulling the lower splash shield (or the front skid plate on TRD Off-Road and TRD Pro trucks) with 10 mm and 12 mm sockets. A single radiator drain gets you roughly 1.5 gallons out of a system that holds more than 2, so a lot of old coolant stays in the block and heater core unless you pull the block plug or do a second drain-and-fill a few hundred miles later.
The thing people get wrong is air. There is no bleeder screw anywhere on these trucks, so if you just top off the radiator and drive away you will end up with a big air pocket, no heat from the vents, and a needle that wanders. Use a spill-free funnel, run the engine with the heater on full hot until both fans cycle and the bubbling stops, and recheck the level cold the next morning. Also use Toyota pink Super Long Life Coolant — not green, not Dex-Cool.
| Item | Type | |
|---|---|---|
| Floor jack 2 ton minimum Lifts the front of the truck to reach the radiator drain and splash shield. | Required | shop |
| Jack stands 2 ton pair, under frame rails Supports the truck while you work underneath. | Safety | shop |
| Wheel chocks Blocks the rear wheels while the front is lifted. | Safety | shop |
| Socket wrench 3/8 in drive ratchet Drives the sockets for the lower shield and any block drain plug. | Required | shop |
| Socket 10 mm, 3/8 in drive Most lower splash shield and air dam fasteners are 10 mm. | Required | shop |
| Socket 12 mm, 3/8 in drive Larger shield/skid plate bolts and some bracket bolts are 12 mm. | Required | shop |
| Socket 14 mm, 3/8 in drive Some TRD Off-Road/Pro front skid plate bolts and crossmember hardware are 14 mm. | Recommended | shop |
| Socket extension 3/8 in drive, 6 in Reaches recessed shield fasteners behind the bumper valance. | Recommended | shop |
| Phillips screwdriver #2 A few splash shield screws and clips take a Phillips head. | Recommended | shop |
| Trim/clip removal tool plastic pry set Pops the plastic push pins holding the lower valance and splash shield. | Recommended | shop |
| Drain pan 3 gallon / 12 qt low-profile Catches the roughly 2 gallons that come out of the radiator. | Required | shop |
| Water pump pliers small, smooth-jaw Gently turns a stiff plastic radiator petcock without snapping it. | Recommended | shop |
| Hose 3/8 in ID clear vinyl, 2-3 ft Slips onto the drain nipple to route coolant into the pan instead of over the crossmember. | Recommended | shop |
| Spill-free funnel kit universal radiator funnel with Toyota adapter Lets you fill and burp air without overflowing; essential since there is no bleeder screw. | Required | shop |
| Coolant Toyota SLLC pink, premixed 50/50 — about 2 gallons Correct P-HOAT coolant for both engines; premixed avoids mixing errors. | Consumables | shop |
| Distilled water 1 gallon For rinsing spills and topping the reservoir if needed. | Consumables | shop |
| Torque wrench 3/8 in drive, 5-75 ft-lb Sets the block drain plug and skid plate bolts properly. | Recommended | shop |
| Shop rags and cardboard Coolant will run down the crossmember; keeps the mess controlled. | Consumables | shop |
| Nitrile gloves Ethylene glycol is toxic and stains skin. | Safety | shop |
| Safety glasses Protects eyes from hot coolant spray if the system is still pressurized. | Safety | shop |
| Turkey baster or fluid extractor small Empties the overflow reservoir so old coolant is not pulled back in. | Recommended | shop |
Tool sizes are the same for both engines: 10 mm and 12 mm for the lower shield, plus 14 mm on some TRD skid plate hardware. The difference is access and volume — the 2.7L 2TR-FE has a reachable cylinder block drain plug on the driver's side of the block, while the 3.5L 2GR-FKS V6 block drain is buried and most people skip it. The V6 also holds roughly a quart more coolant than the four-cylinder; confirm capacity in the manual.
| Radiator drain cock (plastic petcock) | Hand tight only — do not use a wrench to tighten |
| Cylinder block drain plug (if removed) | verify in the service manual |
| Lower engine splash shield / air dam bolts | Approx. 7-9 ft-lb (10-12 Nm) — verify in the service manual |
| TRD front skid plate bolts | verify in the service manual |
The 10/12 mm shield fasteners, plastic radiator petcock location, Toyota pink SLLC requirement, and lack of a bleeder screw are all solid for the 2016-2023 Tacoma; verify exact coolant capacity, block drain plug size, and any torque values labeled 'verify' against the factory service manual for your specific engine and trim.
Toyota Super Long Life Coolant (SLLC), the pink premixed P-HOAT type, for both the 2.7L and 3.5L. Buy the pre-diluted 50/50 jugs; the concentrate must be mixed with deionized water. Plan on about 2 gallons for a drain and fill.
No. There is no bleed screw on either engine, so you purge air by filling through the radiader neck with a spill-free funnel and idling with the heater on full hot until both fans cycle and bubbling stops.
Toyota specifies the first change at 100,000 miles or 10 years, then every 50,000 miles or 5 years after that. If the pink coolant looks brown, rusty, or has debris in the reservoir, change it sooner regardless of mileage.
It is a black plastic petcock at the lower driver's side corner of the radiator, reachable once the lower splash shield or front skid plate is off. Turn it counterclockwise about half a turn by hand — it is fragile, so do not crank on it with a wrench.