[77 TRASHCAN]

Originally Posted by johnta1

And if it's less than about 3.5", there is probably something in there.



Or after marking where it is in the hole, lay it on the outside against the block to end of the pump to see how much would be sticking in the hole.

I was pointing out fact that there's another stud/bolt hole on other side of block...to compare hole depth (factory depth may not be same though...). I just checked both those holes on a 455 block I have , both were exactly 1-1/16 inch deep.....

[HWYSTR455]

The stud length is 3 11/16", as listed in the Ames catalog...

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[jonmachota78]

On a related note, if I remember correctly, the studs have corse threads on one end that go into the block, and fine threads on the other end with corresponding nuts and washers. Be careful to not over torque these fine thread nuts onto the stud. Fine threads will require 1/2 the torque value of corse threads because of the mechanical advantage so its an easy mistake to make. Those two fine thread nuts and studs are the only fine threads on the timing cover/water pump assembly, dont accidentally place undue stress on the studs and possibly crunch the timing cover.