Dumbo The Flying Elephant - Page 99

Larry Hill · Yesterday, 09:34 AM

Hindsight is always clear. If I knew to listen, the block was trying to tell me something. All of the outside studs had to have more force to remove them from normal. What normal is I can't define, but something changed. Part of the problem as I see it is the outer main studs are non ARP and the OD of the rolled threads are .006-.007" smaller than the ARP studs with the same thread form. To correct for the small studs I made the tap drill size a little smaller then carefully taped the hole for the insert. I did a test in an aluminum practice piece before I repaired the first hole. The end result was the stud fit better in the block. I did have to make some stuff to drill hole straight and something to keep the tap straight.

Yesterday, 09:34 AM	#981
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,329 Likes: 1,679 Liked 9,632 Times in 1,998 Posts	Re: Dumbo The Flying Elephant Hindsight is always clear. If I knew to listen, the block was trying to tell me something. All of the outside studs had to have more force to remove them from normal. What normal is I can't define, but something changed. Part of the problem as I see it is the outer main studs are non ARP and the OD of the rolled threads are .006-.007" smaller than the ARP studs with the same thread form. To correct for the small studs I made the tap drill size a little smaller then carefully taped the hole for the insert. I did a test in an aluminum practice piece before I repaired the first hole. The end result was the stud fit better in the block. I did have to make some stuff to drill hole straight and something to keep the tap straight. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817