Re: How much overbore?

Posted by PackardV8 On 2010/12/28 18:58:04

OWen, My experiences are the same as yours.

Had the center main bearing cap removed from my 56 Executive about 9 months ago. At 0.002" clearence plastigauge (yes crank jacked up) showed no unusual wear in the cap shell. I didn't check the other mains. .002" should be somewhere near high end of acceptable clearence for service. Engine has 55K miles on it.

I routinely lug every engine i've ever owned at low speeds. Especialy the Packard. It's just not a dragster.