7upedition

open the pepcock drain all the coolant our flush the system through the old radiator and then replace the radiator with a new one for a $100 and fill with fresh 50/50 colant and then keep a good close eye on it for a few weeks. you nay want to change your thermostat to 180* from 195* while the coolant system is empty and easy to get at... jmo you may spend $150 for radiator, thermo, coolant, but it'd be worth every penny.... cause when your radiator rots from the inside out you'll have a mess when/where it blows