Radaitor is leaking and Im not sure where the plug is to drain remaining antifreeze so it can be changed and stopleak added.

For most cars, set your heater temp control to hot, Make sure engine is cold. Open drain on bottom of rad, let it drain down, depending on model the overflow bottle should drain before the rad does, once its drained remove the rad cap and drain to completion. Make sure any spills are wiped up and no open containers of antifreeze are left sitting around. Cats and dogs love to drink it, but it will kill them if they do!

Rule out leak from water pump. What engine is it - 3.0 3.8. Could be intake manifold gasket. Have the cooling system pressurized, about 12 lbs. and look for leak, bubbles.
check oil for coolant in oil also. Possible head gasket leak.

drain the oil an see if it has water in it. if it does that you have a big problem. if not that make sure the freeze plugs are in other than that umm...idk if there is no leaks than it has to be draining into your oil

bad news fellow cause some stopleak products isnt good for the thermostat or the temp sensor my advice is change and drain a lot dirty fluid clean the cool sistem with waer until the remain turn clear and use new antifreeze to refill i hope be helpfull

Take and drain all the oil out and if you have started it change the filter if you havent started it since adding antifreeze to the oil after draining all the oil out put the oil plug back in and fill with oil if you started it do change the oil filter and drain drain all the oil out and refill.

it will either leak antifreeze out of the weep hole on the pump or the old antifreeze was so old that turned into an acis and ate the blades off the pump. hmmmm. you know what try changing the coolent bottle out, this year intrepid had problems with the bottles going bad, just take my advise about the bottle or go to the delearship and ask their mechanics

Depending on the mileage & other facters unseen I would hesitate a guess! You may have a blown head gasket, A frost plug leak, a water pump leak. Have a rad pressure test done to ascertain the leak location, but you can first check the tail pipe for antifreeze smell, if you smell it you have a head gasket problem. Also check the oil dipstick to see if you have any traces of white residue, an indication of a head gasket leak. I hope this helps & good luck!

Best way to change the antifreeze is to open the petcock at the bottom of the radiator to drain the antifreeze/coolant. Once completely drained close the petcock and refill. Only other way would be to get a flush kit which involves cutting a heater hose, inserting a T and running a garden hose through the system with the radiator open at the bottom through the petcock while the motor is running.
Hope this answers your question. Good luck!
Greg

dont ever use stop leak. need to have t-stat checked and possiable plugged radiator

i would try to flush the cooling system completely
if I had to guess someone put stop leak in it when the freeze plug started leaking
also check the oil to make sure there is no water in the oil