The radiator on my 2006 Explorer has had a slow leak for about 6 years. Has been leaking a bit more lately at times, but still not too bad. I put a quart of antifreeze in every 2 weeks or so. Sometimes I see the leak on the ground, but mostly it evaporates, and there is no sign of it, but a low overflow tank. Short of replacing the radiator, have been considering trying some stop leak. The truck is only worth a couple of grand as is, so figured there isn't much to lose. I could always put a radiator in, but if a cheap fix might get me down the road a year or so, that's all I want. Or I could just do nothing. Suggestions?? Thanks, Ed