Re: Engine Block Repair

Posted by george md on November 18, 2010 at 09:21:48 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.

george

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