[TedEaton]

Not to be an alarmist but that antifreeze on that rear main bolt would make me suspect a crack in the rear main bolt hole. The front four main caps have longer bolts than those two bolts in the rear cap (under the rear main seal retainer) and it's possible during a previous engine disassembly that one or two of the longer bolts was used in the rear main holes rather than the required shorter bolts. If this was the case, then the longer bolts bottomed out when being torqued in place and potentially cracked the block. Ted Eaton.