Quote:
Originally Posted by BenzTurbo
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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That presents a dilemma. You can't flush the block without a head but do you want to flush that junk through a freshly cleaned head? Can you slap the cracked head back on the block for a flush? Reuse the head gasket with easy-to-remove RTV then wedge the thermostat open so you can flush the engine cold. Run the water pump with a belt and electric motor.
Sixto
MB-less