Only time I needed more than a breaker bar was to remove the bolt holding the pulley on my engine in the Acura. I used the pipe from the jack handle to extend the breaker bar several feet, then I hopped on the end until a loud bang occurred. Apparently that was the happy noise of the bolt loosening.
I put an aluminum underdrive pulley on, then snuged back up to spec, which was hundreds less ft/lbs than it took to loosen.
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