Quote:
Originally Posted by mgarblik
I just read your entire thread. Based on the information I was able to gather, you most likely have a broken ring land, stuck piston ring (s) in cylinder #1. A blown head gasket rarely effects just 1 cylinder, almost always 2 are effected, side by side. But the loose head bolts you found, anything is possible. Cast pistons are particularly prone to detonation damage. I mention this because you mentioned 93+ octane gasoline was hard to find in your area. That leads me to believe some detonation was happening and it doesn't take much to kill those pistons. To me, it looks like a disassembly is in your future. Once disassembled, you can figure out what cam is actually in there and the condition of the pistons and ring lands. All I can say concerning aluminum vs iron heads is aluminum is more tolerant of lower octane fuel. Good luck with it.
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the cylinder did hold fluid for 24hrs with a 50/50 acetone/ATF soak.
So I still have 70 psi and this is driving me crazy.
Someone mentioned a burnt valve?