KW block sealer! get it at the parts store,follow directions to the letter.CLEAN,CLEAN,CLEAN!.I sealed up a crack between the valves in a 235 that way!
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.I learned that from an anchient mechanic who used it to seal a cylinder wall rust through leak on a Honda Civic! eek
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Then use some of Jims putty to beautify the outside fo appearance! cool

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!