ARP Main Studs & Bolts Detailed

Duster, you can have your shop enlarge the hole in the head where that feed is. It doesnt take much. It looks like a ton of space, but the hole in the cam bearing is only about 3/16 in diameter. So about .020 wider than the stud diameter should be enough room for the oil to get by, and wont weaken the head at all.

It's funny. That oil pump/stud issue has ben around for over a year. I've heard from about 5 other people who were told by ARp "this is the first we've heard of it.." I love that line. No matter what tech line you call, you will always hear that. Now I have a standard response. "I'm sure. Can you transfer me to the guy that wrote the tech line personnel instruction notebook you are reading from please?"