My 1998 k-1500 4.3, 229,000 miles just started to drip from a seam below the filler. I just put new water pump in 2 weeks ago. I turned the cap back to relieve some pressure & it stopped. Any suggestion's? will it be all-right? dosen't over-heat. should I put some radiator sealer in it? by backing off the pressure, will it hurt my Vortek? Been snow plowing big time this winter & want what's best for my work-horse, what can I use to quick fix til I have time to put new radiator in it, with out hurting my motor cooling system?