In that situation, and only then, I'd give the sanding a shot before replacing the radiator...but it's the first I've heard of that issue here...and I read a lot here. But, that said, my concern was whether he had the decent skill. If you're sanding plastic to then have a pressure seal from o-ring, you'd need to be very careful and finish with a very fine sandpaper.
Debut Radio Show Tues, May 3, 1 p.m. on Hamiltonradio.net The Mechanical Animals
call in for car repair help! 609-503-4058
A recent set--NSFW audio: https://youtu.be/_dcxcZfD6dg
Mangofy your E46!
Last edited by dmax; 01-09-2013 at 08:22 PM.