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What's the best way to clean out the freeze plug water jackets on a big block?

Hot water ones are great but 10 times the cost.
My tool jobber is an exellent guy.... He will call me when he gets high dollar trade ins that he knows i could never buy new. Thats how i got my Ridgid 535 all in one pipe threader ( shop style) and my Alkota hot water pressure washer. God knows i give him the cash when its something i really need new. The pressure washer belonged to a school, and they only used it to wash trash cans and de-ice an occasional bus.
 
The hot tank active agent is still available. It's the cleaning of the tank hazardous part and disposal they are avoiding. Seems like Engine Power TV show always has a nice clean new looking engine blocks. They are in Nashville area. Yeah, wasted my money on the last 3 blocks that I had done, well, I didn't have to knock the cam bearings out.
 
There's absolutely no way that you can reach all of the dead-end corrosion and debris traps with a probe

Do it right and have the block hot tanked.
 
There's absolutely no way that you can reach all of the dead-end corrosion and debris traps with a probe

Do it right and have the block hot tanked.

For sure have it still hot tanked and flushed out. But I would pick the debris and opened up rust clogged passageways first.

Need to do both.
 
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