Just a suggestion here. Please make sure that before you post the vendor you got it from, make sure you’ve contacted them and they refuse to warrantee or do anything for you. Not fair to post the vendor in a "no support" thread if you haven't checked with them first. I assume you have also contact AMG? You can contact them from their website, I've done it a few times and they are very responsive. It would be nice to know what their responses are.
Very disconcerting if a new AMG crate motor cracked. Was your engine a complete engine including IP? Reason I ask is that I believe complete engines are test fired and the IP is set correctly. If not, did you or a mechanic set the IP? I would think that if the IP were set too far retarded it would probably put a lot of additional stress on the internals including the block webbing. Just curious.
Art.
Art Paltz
1999 Suburban K2500 6.5TD (stock)
2000 Undercover Dragster, 468 BBC, 7.74@173MPH, waiting on new 622 aluminum BBC to be finished.
1992 Tube Chassis Camaro, 468 BBC, 8.54@157MPH (SOLD)
1987 Buick Grand National, 11.8@114, pump gas (for sale)
1969 Camaro SS/RS 396-350HP, stock restoration, it never leaves the garage...