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Tools you need for coolant flush on a 2021-2024 Ford F-150

Moderate ยท 1.5-2.5 hours (add 30 min if you vacuum-fill) ยท Updated 2026-09-14
Must-have tools
  1. Hose clamp pliers, spring-clamp type
  2. 8 mm socket, 1/4 in drive
  3. Drain pan, 4 gal (15 L) minimum
  4. Motorcraft Orange prediluted coolant, 2 gal
  5. Cooling system vacuum fill tool

On the 14th-gen F-150 this is a hose-off job rather than a drain-plug job. Most trucks in this generation have no usable radiator drain cock, so you pull the lower radiator hose at the driver-side corner after taking off the lower air deflector with an 8 mm socket. The hoses use constant-tension spring clamps, so real hose clamp pliers are the difference between a 20-minute job and a knuckle-busting hour. Expect roughly 3.5-4 gallons out of the radiator and a couple of quarts of old coolant still hiding in the block, which is why a distilled-water flush is worth doing if the coolant is dark.

What varies is capacity and how many loops you are dealing with, not tool sizes. Every engine here takes Motorcraft Orange prediluted (WSS-M97B44-D2) โ€” already mixed, so no water gets added. The thing people get wrong is the refill: filling the degas bottle to the mark and calling it done leaves air in the heater core and, on EcoBoost trucks, in the turbo coolant lines. Either vacuum-fill it or idle it with the heater on full hot and a spill-free funnel until the fan cycles and the vents blow hot, then re-check the level over the next few cold starts.

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Complete tool and parts list

ItemType
Floor jack
2 ton minimum
Lift the front of the truck to reach the lower radiator hose.
Requiredshop
Jack stands
3 ton pair
Support the truck while you work under the front bumper.
Safetyshop
Wheel chocks

Chock the rear wheels before lifting.
Safetyshop
Socket set
1/4 in and 3/8 in drive, 7/8/10/13 mm
8 mm and 10 mm hex-head screws hold the lower air deflector and splash shields; 13 mm for tow-hook/skid plate bolts if fitted.
Requiredshop
Ratchet and extensions
1/4 in and 3/8 in drive, 3 in and 6 in extensions
Reach deflector fasteners behind the bumper valance.
Requiredshop
Hose clamp pliers
Spring (constant-tension) clamp pliers, cable type preferred
Ford uses spring clamps on the radiator and heater hoses; these are very hard to move with regular pliers in a tight space.
Requiredshop
Flat-blade screwdriver
Medium, plus a small pick
Break the hose bead loose from the radiator neck and pop plastic push-pin retainers.
Recommendedshop
Drain pan
4 gal (15 L) low-profile
Catches the roughly 3.5-4 gal that dumps out when the lower hose comes off.
Requiredshop
Funnel
Long-neck, coolant-only
Fill the degas bottle without spilling onto the belt and accessory drive.
Requiredshop
Cooling system vacuum fill tool
Venturi type, needs 90 psi air supply, universal cone adapters
Pulls the air out of the block and heater core so you avoid a long burp cycle and heater-core air lock.
Recommendedshop
Coolant spill-free funnel kit
Universal with Ford degas-bottle adapter
Alternative to vacuum filling; lets you run the engine and burp air without overflowing.
Recommendedshop
Refractometer or coolant tester
Ethylene glycol scale
Confirms the final mix is around -34 F / 50-50 after refill.
Recommendedshop
Torque wrench
1/4 in drive, 2-20 Nm range
Small deflector and shield screws strip easily in plastic and sheet metal.
Recommendedshop
OBD-II scan tool
Live data, coolant temp PID
Watch coolant temperature climb and confirm the thermostat opens so the system burps fully.
Recommendedshop
Motorcraft Orange prediluted coolant
VC-3DIL-B, meets Ford WSS-M97B44-D2; 2 gal (7.5 L) for a drain and fill, 4-5 gal if you flush
The only coolant specified for these engines; it is already 50-50, do not add water.
Partsshop
Distilled water
1 gal
For rinsing during a flush and for cleaning spills โ€” never tap water in the system.
Consumablesshop
Replacement spring clamps or worm clamps
Sized to 1.5 in / 38 mm lower radiator hose
Insurance if an old spring clamp loses tension or you damage one removing it.
Partsshop
Nitrile gloves

Ethylene glycol is toxic and absorbs through skin.
Safetyshop
Safety glasses

Hot coolant can spray when a hose releases.
Safetyshop
Shop rags and absorbent pads

Coolant is slick and toxic to pets โ€” clean up fully.
Consumablesshop
Fender cover

Keeps the plastic engine cover and paint clean while you lean in.
Recommendedshop

Differences within the 2021-2024 generation

Tool sizes are the same across 2.7 EcoBoost, 3.5 EcoBoost, 5.0 V8 and 3.5 PowerBoost โ€” 8 mm (some 10 mm) deflector screws and spring clamps on the lower hose. Capacity differs: plan on roughly 3.5-4 gal (13-15 L) total for the engine loop on the V6s and 5.0, slightly more on PowerBoost; verify the exact figure for your VIN. PowerBoost also has a second, independent low-temperature coolant loop with its own reservoir for the power electronics that is serviced separately and is not touched by an engine drain.

Torque specs

Lower air deflector / splash shield screws (8 mm hex head)verify in the service manual (snug, roughly 7-9 Nm)
Radiator drain plug (if equipped)verify in the service manual
Degas bottle mounting nutsverify in the service manual
Worm-gear clamp on lower radiator hose (if substituted)4-5 Nm (35-45 in-lb), do not crush the neck

How the job goes

  1. Let the engine cool completely. This system holds pressure for hours; the degas bottle cap must be cool to the touch before you touch it.
  2. Chock the rear wheels, lift the front of the truck and set it on jack stands under the frame rails. A slight nose-down or level stance drains best.
  3. Remove the lower air deflector and the driver-side front splash shield with an 8 mm socket (some builds also use 10 mm hex heads and plastic push pins) to expose the radiator's lower driver-side corner.
  4. Slowly loosen the degas bottle cap one turn to vent pressure, then remove it. This also lets the system drain instead of glugging.
  5. Position the 4 gal drain pan under the radiator's lower hose connection. Check first for a factory drain plug on the lower tank; if your truck has one, open it and drain, then finish by pulling the hose.
  6. Squeeze the spring clamp with hose clamp pliers, slide it up the hose, twist the hose to break the seal, and pull it off the radiator. Expect a fast 3-4 gal dump โ€” aim it into the pan.
  7. Let it drain until it stops dripping. If you are flushing, reconnect the hose, fill with distilled water, run to operating temperature, cool, and drain again. Repeat until it comes out clear.
  8. Reinstall the lower hose fully onto the neck and reposition the spring clamp behind the raised bead. Tug the hose to confirm it is locked on.
  9. Refill: either fit the vacuum tool to the degas bottle, pull 20-25 in-Hg, confirm it holds vacuum for two minutes, then draw in Motorcraft Orange prediluted coolant โ€” or fit a spill-free funnel and pour slowly.
  10. If you did not vacuum-fill: with the funnel in place, start the engine, set the heater to full hot with the fan on low, and idle. Top up as the level drops when the thermostat opens; squeeze the upper radiator hose to help air move.
  11. Run until the electric fan cycles and the heater blows hot, then shut off, let it cool, and set the level to the MAX/COLD FILL mark on the degas bottle. Install the cap fully.
  12. Lower the truck, reinstall the air deflector and splash shields, and check the level again after two or three cold/hot cycles. Top up only through the degas bottle.
  13. PowerBoost only: verify the separate low-temperature/eDrive reservoir is at its own mark. It is a different loop and is not filled by draining the engine radiator.
  14. Dispose of the old coolant at a recycling center. Do not leave it where pets can reach it.

Watch out

Fastener sizes (8 mm and 10 mm hex-head deflector screws, spring clamps on the lower radiator hose) and the Motorcraft Orange VC-3DIL-B specification are consistent across the 14th-gen F-150, but capacity varies by engine and whether your truck has a factory radiator drain plug โ€” confirm both in the Ford workshop manual or the owner's manual for your VIN.

Frequently asked

What coolant does a 2021-2024 F-150 use?

Motorcraft Orange Prediluted Antifreeze/Coolant, part number VC-3DIL-B, meeting Ford spec WSS-M97B44-D2. It is already 50-50, so nothing gets added, and it should not be mixed with green, Dex-Cool, or Ford's older yellow coolant.

Does the 2021+ F-150 radiator have a drain plug?

Many do not, and the ones that do are hard to reach behind the lower air deflector. The standard approach is to remove the lower air deflector with an 8 mm socket and pull the lower radiator hose off the driver-side corner of the radiator.

How much coolant does it take?

A drain-and-fill through the lower hose typically takes about 3.5-4 gallons (13-15 L) on the 2.7, 3.5 and 5.0; buy two gallons of prediluted for a simple refill and four to five if you are flushing. Confirm the exact capacity for your engine in the manual.

How do you bleed the air out?

Best method is a venturi vacuum fill tool on the degas bottle: pull 20-25 in-Hg, hold it to check for leaks, then draw the coolant in. Otherwise fit a spill-free funnel, idle with the heater on full hot until the cooling fan cycles and the vents blow hot, then set the level cold at the MAX mark and re-check after a few drive cycles.

Other jobs on the 2021-2024 Ford F-150

Oil ChangeFront Brake Pads and RotorsRear Brake Pads and RotorsBattery ReplacementSpark Plug ReplacementAlternator ReplacementStarter ReplacementSerpentine Belt ReplacementTire RotationHeadlight Bulb ReplacementWiper Blade ReplacementThermostat ReplacementFront Strut ReplacementCabin Air Filter ReplacementEngine Air Filter ReplacementTransmission Fluid ChangeFront Wheel Bearing ReplacementOxygen Sensor ReplacementWater Pump Replacement

Coolant Flush on other vehicles

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