Posted By: dragon
Which rad cap - 07/21/18 12:29 AM
How are you deciding what pressure cap to run on your radiator Thanks
Posted By: nss guy
Re: Which rad cap - 07/21/18 01:17 AM
18-21 psi, got to keep the coolant in the radiator.
Posted By: ahy
Re: Which rad cap - 07/21/18 01:41 AM
From memory, 12 or 14 psi was original and some replacements are 16 psi. With a good cooling system + antifreeze, either should work fine. Boiling point with 50/50 is above 250 F with 12 psi.
Only thing to add is sometimes the "flip top" type with pressure release lever tend to leak. I avoid those. Otherwise I find a decent replacement cap from the AP store is fully functional.
If you want original appearance, need to look around.