Yeah the early ones had a few problems but think how many of these engines have been made. The later (after 96 i think) and a 599 block had sorted a few issues out with cracked blocks, heat. ONe thing they don't like is to much boost, thats why the heads crack.
Like anything there is a site dedicated to them, very helpful bunch and a hell of alot of help. The Diesel Page - for the 6.2L, 6.5L, and Duramax 6600 (6.6L) GM Chevrolet and GMC diesel engines.
Is there a site dedicated to the 4BD1 other than the 4btswaps? Just curious for info on them

