Posted by george md on November 18, 2010 at 09:22:25 from (209.213.167.201):
In Reply to: Engine Block Repair posted by Scott in PA on November 17, 2010 at 20:22:22:
Scott,
That crack will go all the way thru, cast does not bend ,it breaks except in very thin sections. Second note ,if you weld it with any kind of arc, the area around the weld will be so hard that it is almost impossible to machine. The weld may be soft ,but the fusion zone will be extremely hard. It does that because the rapid temp drop between the arc temp and the surrounding cool material. To get rid of the hard spots ,you need to heat the casting to about 1500 deg and hold for 15 to 20 minutes to normalize, then it will be machineable.
As stated below ,you best repair would be the locknstitch products , they work much better than the old irontite pins .I used the old ones for years, but have changed to the locknstitch for almost every thing, and will be very machineable after installation.I do a fair amount of cast repair.
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