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Product Information

A threaded coolant bottle cap from Gates, rated 16 psi, for the closed cooling system on 2011-2014 Ford F-150 and 2011-2014 Ford Mustang applications in our fitment data. Its one job is to seal the coolant bottle and hold the cooling system at the pressure the cap is rated for. Small part, but a tired or wrong-rated cap is the kind of thing that turns a good day into a puddle under the truck.

Why Upgrade to a Fresh Coolant Bottle Cap

  • Rated 16 psi, so you are putting a cap with a stated pressure rating on the bottle instead of guessing what the old one still holds.
  • Threaded design: it screws onto the coolant bottle, so you can feel it seat when it is tight.
  • Built for a closed system, which is the setup this cap is named for, so you are matching the cap to the kind of bottle it was made to seal.
  • Gates puts its name on it, and the part number 31406 is a real catalogue number you can cross-check against your bottle before you order.

Fitment Notes

Our fitment data lists this cap for the 2011-2014 Ford F-150 Base and the 2011-2014 Ford Mustang GT, GT500, V6 and Boss 302 (2012-2013). Does not fit the F-150 Raptor. [VERIFY: the title names a 97-08 Ford Expedition and 02-12 Explorer, while our coverage data lists 2011-2014 F-150 and Mustang, so confirm the cap threads match your bottle before you buy.]

More Oil System that fit your truck or Mustang

Install and Honest Talk

The old cap comes off the coolant bottle and this one threads on in its place. Afterwards you should have a cap that seats properly and holds the system at the 16 psi it is rated for. Honest talk: this is a cap, not a cure. If the bottle itself is cracked or a hose is weeping, a new cap will not stop the loss, and if your bottle calls for a different pressure rating this is the wrong part, since 16 psi is the only rating listed here. There is also the fitment question above, which is worth settling before the box arrives. What else you need: [VERIFY: supporting parts, hardware in the box, tune requirement, install steps, and whether a coolant top-up is called for after the swap].

Specs

  • Brand: Gates
  • Part number: 31406
  • Quantity: Single cap, as titled
  • Pressure rating: 16 psi
  • Cap style: Threaded
  • System type: Closed system
  • Part type: [VERIFY: catalogue files this under "Oil Caps", the title says coolant bottle cap]
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