Repairing SB Chev Heads

Steve Williams · 06-26-2013, 09:40 PM

Quote:

Originally Posted by Alan Roehrich

That head needs those stud bosses drilled and tapped on a Bridgeport style mill, they have to be perfect, if they're not, you'll have nothing but trouble.

Truth.

Jody Lang · 06-26-2013, 10:42 PM

Jeff, you're asking for a favor by asking for help on the forum. Now get on the horn and ask for some help!!! There's 2 machinists we both know that live in the North end that i assume would want to help you out.

A keensert or timesert that has plenty of thread i would think would be the ticket.

Rich Biebel · 06-27-2013, 12:27 PM

I once had a set of small block heads brought to me for repair that had old BRC rocker shafts. Stuff was all worn out and a mess. Needed new valves as well. I convinced the racer a simple set of stud mounted rockers would be fine.

I soon discovered the stud holes had been drilled and tapped by hand as they were all crooked and if you sighted down the side it was rediculously bad.

I was able drill and tap the holes in my seat and guide machine and helicoiled every hole......They were not perfect as it was impossible to get a perfectly straight hole after what was done previously....

It all worked out well and the guy got many runs out of those heads....

Seat and guide machine or a Bridgeport is a must....if there is enough stud boss left to do anything with. I would not consider welding them as I just don't feel that is a good option

06-26-2013, 10:42 PM	#2
Jody Lang Member Join Date: Mar 2002 Posts: 306 Likes: 28 Liked 89 Times in 28 Posts	Re: Repairing SB Chev Heads Jeff, you're asking for a favor by asking for help on the forum. Now get on the horn and ask for some help!!! There's 2 machinists we both know that live in the North end that i assume would want to help you out. A keensert or timesert that has plenty of thread i would think would be the ticket.

06-27-2013, 12:27 PM	#3
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: Repairing SB Chev Heads I once had a set of small block heads brought to me for repair that had old BRC rocker shafts. Stuff was all worn out and a mess. Needed new valves as well. I convinced the racer a simple set of stud mounted rockers would be fine. I soon discovered the stud holes had been drilled and tapped by hand as they were all crooked and if you sighted down the side it was rediculously bad. I was able drill and tap the holes in my seat and guide machine and helicoiled every hole......They were not perfect as it was impossible to get a perfectly straight hole after what was done previously.... It all worked out well and the guy got many runs out of those heads.... Seat and guide machine or a Bridgeport is a must....if there is enough stud boss left to do anything with. I would not consider welding them as I just don't feel that is a good option __________________ Rich Biebel S/C 1479 Stock 147R Last edited by Rich Biebel; 06-27-2013 at 06:16 PM.