Here's the deal. If you've read the "1st Diesel Ever" thread you know my 99 2500 I just bought Thursday has a cracked block. I knew I would be replacing the motor at some point due to the 209K miles on it but hoped to get a couple years of use from it first. So, I've been reading about two products; Moroso Ceramic Engine Seal & K&W Block sealer. I don't have 6-8 grand to put into this vehicle right now, so I was wondering if you guys have ever tried either of these products and what was the result? The engine hasn't even come close to overheating, by the way.