do you think a citric acid flush will loosen most of that rust? i loosened the block drain and clean blue mb coolant came out but it seems to be built up a bit in the block
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83 300CD- sanden, dual p/f condensers, 160a alternator, ect
91 300TD- 722.6, #22 head, 3.5L IP, w140 manifolds, ect
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