Freakin' water outlet won't seal!

The flange probably is straight when you take it off and measure it. But as soon as you tighten it...I'm betting it warps like mad.

I went to Carquest and got a new filler neck, it was aluminum and the flange was OVER twice as thick as my old one. One gasket, no leaks.

The RTV's and sealers DO work but I'm not confident that they deal with a warpage issue. I prefer to get to the root of the problem, myself, but there's nothing wrong with sealants if they work. Having read this thread, I'd consider a nice beefy new flange, AND sealer!