Quote:
Originally Posted by grumppyoldman
The block was boiled out when rebuilt about 8 yrs. ago, so I'm pretty sure it' ok. Al
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From my experience that will not clean the stuff out of the water jackets. Most of the blocks still have stuff in there from the factory and several rebuilds (tank cleanings). There is casting wire and core sand, etc. My guess is that over the years these serve as a damn/retainer that further plug things up. The only thing that gets it out of there is scraping it out. Now, if the reduced flow is not bothering you and it stays in place, just flushing it out might work.