Ismalley, as you probably already know you need to drill a hole in the remaining bolt portion in order to use an EZ-Out. Use a center punch so the drill bit has a good starting point. Best to start with a small drill bit and increase in size until the hole is large enough to accept the EZ-Out. Take your time and things should work out fine. As mentioned isolate the work area so you don't get any metal chips in the engine. You may want to apply some rust cutter sparingly to the bolt remnant threads before using the EZ-Out in the drilled hole.

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Fred Hoelzle