JB Weld Waterweld is some good stuff. It managed to patch the crack in my coolant crossover on my 93 with the PI swap.
Just gotta clean up the area and give it a little scuff with some light sandpaper. Kneed the putty for a bit and jamb it in the crack something fierce and it should seal it up. You may have to drain some coolant to keep if from wetting the location and preventing the bond, but considering that I did mine with a little leakage going on, I don't think that should be an issue. It does take a while to cure up though.
Just gotta clean up the area and give it a little scuff with some light sandpaper. Kneed the putty for a bit and jamb it in the crack something fierce and it should seal it up. You may have to drain some coolant to keep if from wetting the location and preventing the bond, but considering that I did mine with a little leakage going on, I don't think that should be an issue. It does take a while to cure up though.
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