Repairable or Garden Art ????

Fairlane500

Fairlane500

Senior Member
I have another C69A and stripped it to assess its condition when I met this crack. I am a relative new comer to these things, So is this something repairable or is she garden art ???? Please let me down gently it will be like a death in the family if shes goneburger...
 

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The way I have seen it done was to find the end of the crack and drill it then install a threaded iron plug that's tapered. Then drill another hole overlapping the first plug, keep repeating this process the length of the crack. I bet your block can be saved by this method and installing a sleeve in that cylinder and a new seat. I would pull the valve and guide out to see if the crack runs down into the guide hole, it might just be under the seat which would be a good thing. The further it goes in the guide hole it makes it harder to repair.
 
Ken has it exactly correct , I have fixed several cracked the same as yours . If it has a valve seat remove it first the crack s usually go down into the port also just pin it from one end of crack to the other , cut & install new seat , then bore & install sleeve in cylinder. Been away too long , so not sure who in CHCH will do this for you , but Blacklows in Ashburton can handle it . The drilling & pining is really easy to do , its like a pipe thread & as the plugs get tight enough they break off & then you drill the next hole intersecting the last plug.
Cheers
Tony
 
This pinning is ok but not a true stitch. The tapered plugs can spread the crack. Usually locks are put in every so often to keep the crack from opening.
Look in the third picture to see what I am referring to. This was most likely done by Frank Casey of Millbury Ma. He has all kinds of drills and tooling to get into places no one thought possible. Makes his own pins and locks. One man operation out of his cellar. Pressure tests all repairs.
http://www.jandm-machine.com/metalStitching.html
 
There are different pins, some are tapered.. some have straight threads, some have hooked threads and pull the crack together ---then there are locks ---
http://www.locknstitch.com/ --this site has some good information so you can have some knowledge in your search for a proper repair.
 
Fairlane, i think "laced" is meant the same as "stitched", as discussed.....good luck....doesn't look too bad, and i hope it can be repaired....Mike
 
If done right there is no need to sleeve the bolck. Have had several done by Frank Casey of mass. Depending on how far down the cylinder the crack goes.
 
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