Re: Oil Pan drain plug

Posted by PackardV8 On 2007/1/12 21:47:35

The (56?) pan has a flat stamped at 45 degrees at the very front of the pan. (55?) is simply rounded. I've not yet determined which pan is which in terms of years. My 56 very original Exec has the flat at the front of the pan.
Also, at the front of the pan is a reenforcement strap across the two front most bolts. In some pans it is spotwelded to the pan. On my 56 Exec pan it is held in place by the bolts. Supposedly, there is a LATE 56 pan with a subtle expansion at the rear most corner to accomodate the plug for the pressure relief valve of the pump.
I have one of each pan described above EXCEPT the alleged LATE 56 pan.