I searched and found one that said the main saddles had cracked. That's severe. All the others were due to catastrophic failures or amatuer hour at the head swap shop. Water doesn't compress at the bottom of a head bolt hole and when you tighten the head bolts it blows out the aluminum and breaks/cracks the block. I've even done that one myself long ago. :whack: God, did I honestly admit that in a public forum? :eek:

