a few months ago i purchased a 52 hatt with 8v92ta engines. i pulled the zinc out of the heat exchanger and it was obvious there was was some calcium/salt build up in there. Anyhow, i want to flush out the system without disassembling the entire heat exchanger. Now i assume i would get a pump and hook it up the IN of the heat exchanger and have the system flush into a bucket and run this system for 15 min or so but my question is what solution is safe to use? Now i know the detroit manuals says to use a muriatic acid/water on the heat exchanger alone, but what would i use to flush through the engine? will this muriatic acid combo mess up the rubber seals and or impeller? Does anyone make a solution SAFE to use? any input on this would be helpful.