Opinions Please

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I sometimes think I've tried all available products to determine the most suitable for my requirement. Many times only to have a massive collection of what doesn't't work as well as the salesman said. So I asking everyone that cares to respond, what  have you found in SMAW rod suitable for cast iron (engine parts) heads and blocks that puts a smile on your face and if it is difficult to find where do I get it. I'm looking for 3/32nd and 1/8th diam. and would be willing to try either doing the repair(cracks) cold and slow or hot. #1 priority would be a rod that wets in well and is machinable and is porosity free.Thanks in advance for any suggestions,Ric Havel
Reply:nickel rodIF it Catches...Let it Burn
Reply:I have also tried numerous rods , some more succesfully than others. Alot of times if possible I'd just braze it myself. I'm looking forward to the various opinions on this thread. (please don't let me down) LOLAdam
Reply:we've "windowed" many 427 ford "fe" blocks in the past..rods out the side..cracks up the main galleys up to the cam bores...what a mess..we saved what we found in the starting line..waterbox..wherever the kaboom was as far as "block pieces"..we constructed a oven out of firebrick thats big enough for blocks..heads..use charcoal (50-60 lbs) to get everything nice and toastyall we've ever used was "nickle 99" rods from harris..after welding we put the block.. head..whatever back in the oven and let the natural cool off process run its course..i'd say 95% of the time we are succesful...sometimes after done the blocks need "massaging" but when you cant get them anymore you do what you must to save what you have left... hope you can get any useful info from this post....take care...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.