Thread: stripped crank nose

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Chase the threads with a bottoming tap and install a grade 8 stud with Loctite. Use a nut to retain the damper.
Use some 400 sandpaper to lightly sand the inside bore of the damper to make sure there are no burrs. Feel around inside with your fingers. Make sure the crank snout is de-burred as well. Oil both surfaces well and use a piece of pipe a little bigger than the crank snout to bang the damper on with a block of wood held between the pipe and your BFH, then secure it with the nut.