Radiator Cap Confusion

[NJGearhead666]

I servicing my cooling system and installing a new thermostat. I noticed that my radiator cap is starting to leak and the rubber in it is starting to crack up. Its a Ford radiator cap 16lb. But NAPA says I should have a 13lb cap. which is the right cap for the IDI? Also can I trust an aftermarket cap? or should I go to Ford to get it?

 

[chris142]

13 psi is what it originally came with.

 

[yARIC008]

You need a 13 PSI cap.

 

[FoolhardyIDI]

Stant 10329 it's the cap I use on my radiator. 13lb pressure rating.

Pulled this from there web sight

Part Number 10329 (13 psi)
Product Type Safety Release Radiator Cap
CARQUEST 33061
Gates 31511
Gates Canada 31511
NAPA 703-1700
Stant (Carded) 11329
Carquest 33061
Gates 31511
Napa 703-1700
Stant Carded 11329