radiator question
 

What year N/A was the one that did not have a overflow cap on the radiator? my overflow niple come out of the filler neck.

Some S4s had it on the top/middle of the radiator, and all S5s had it on the extended neck near the battery.

S4's

see my radiator does not have the cap on the top or the extended neck near the battery

And the problem is? Lots of S4s have it on the thermostat cover. There are a couple different OEM S4 radiators.

the one that i have its bad so i need to replace it so when i call around i want to get the right one.

you can touch the radiator and it only gets hot on the bottom corner

Pick up a koyo or similar aluminum radiator and be done with it. You'll need a S4 (86-88) specific model, just dont throw away anything off your old radiator in case you need to supply mounting gear.