Quote:
Originally Posted by JSeery
Tanking a block does not insure it is cleaned out inside the water jackets. However, your cooling issue seems like a bigger issue than that. Are you sure the radiator has a large enough capacity for the engine?
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Correct on hot tanking.
Scraping, prodding, poking at all the crud is the first.
Then bake blasting
Then more scraping, prodding, and poking to get any left over bits.
Tanking is the final cleaning step.