rear union o ring. After several runs and complete cool downs ,no leaks finally.Yes . In my minds eye i thought taking off #7 clamp to take off the linkage was needed. Hopefully i can get at both union hose pieces no problem. I have in hand the two hoses, 0 rings and new clamps.Waiting on the unions . Might just put in what I have and skip the unions. My new engine ice coolant i drained again is turning black and wrecked.I hope its that rear union 0 ring that has turned to liquid coal like the front one so as to fix the problem. Thanks again.
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