bought a spoon radiator cap and it came in today i was trying to install it but it not fitting like the stock one would do, i notice the spring on the cap is harder. anyone have one and know how to put it on?

Thx

edit: Its a Type F if that matters

 

i believe the Type F fits the koyo radiator and not the OEM radiator

i'm not sure but just a guess

 

The type F will not fit the OEM radiator. You need the type D.

 

Bummer. You didn't check to see which type fits OEM S2000s?