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Reply to "Frozen head bolt / engine reconditioning"

i just asked if it was an L key because they might not have used great tool steel for someting only intended to be used by hand. i'd gently warm the block in the area where the bolt is sunk with a propane torch, again very gently maybe several times to let the heat soak in before going at it again. absolutely no where near hot enough to harm anything just like normal operating temp

a little heat can be good
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