Originally Posted by m_lars

Just a quick follow up. I decided to pull the engine back apart and found that it had evidence of coolant in #5 with no obvious reason why. I found a youtube video that had the same problem I think I had, but now I can't find it to post here... He had a leak in the aluminum between the cylinder walls that worked it's way up between the sleeve and the block. The block initially passed a pressure test, but failed after he warmed it up. It had little pinholes that allowed coolant to leak in. Anyway, I bought a junkyard engine to replace it, but I'm not happy with the results. The truck now sits in the back yard while I acquire parts for an LS swap.