Engine: V8 guys - stud on top of head bolt - what years/applications?

[PackardV8]

Today, in a discussion, there was some disagreement as to what years and applications the Studebaker V8s came with a large threaded stud on top of one or two head bolts.

What say you? What applications had this stud and what years? What were the locations of the head bolts with this threaded stud?

jack vines

[StudeRich]

Stud 7/16 -14 X 4 15/16" 532446 (2) For '51 to '58's on the LEFT Front bolt 1 & 2 at Exhaust Ports for the Eaton? P/S Pump only used with the Saginaw Power Steering Gear.

Also on the Front of the Right Head, Exhaust side, Bolt 1 and 2 for the Early A/C Systems. This one is just a little bit sketchy in back of my deteriorating brain, since on the West Coast we see SO few A/C Cars.

But very handy for use with Aftermarket R3 Headers for Lark/Hawk that have no Alt./Gen. Mount Bracket on them.

[bezhawk]

53-58 with the Saginaw power steering, and the R2 and R3 engines for the supercharger bracket. I wasn't aware that AC cars used them too. I haven't seen them on later AC compressor mounts...perhaps the early Novis used them?

[Mike Van Veghten]

Also the front "two" head bolts (actually, cap screws by definition), lower pass. side (at the front exhaust passage), alternator bracket for the R3 exhaust alternator bracket.

Mike

[PackardV8]

As usual, the answers are found here and everyone (other than he who shall not be publicly shamed) was right to some degree.

So, while not common, these were used on some early, some late, some left, some right, some PS, some AC, some supercharged.

Are Stud 7/16 -14 X 4 15/16" 532446 (2) available through our vendors?

Thanks again for sharing the wealth of experience.

jack vines

[Xcalibur]

Probably the same used for the R-series supercharger bracket mount, as well. Stude wouldn't use two different parts if only one would do.

[rkapteyn]

These are ard to find.
I bought the last ones in 1972 and they are all gone.

Robert Kapteyn

[larkregal62]

I'm confused. Why can't a 7/16-14x5" grade 8 (cap bolts) be used?? http://www.nutsandbolts.com/716-14-x...-5-p-1438.html

[StudeRich]

I'm confused. Why can't a 7/16-14x5" grade 8 (cap bolts) be used?? http://www.nutsandbolts.com/716-14-x...-5-p-1438.html

Maybe you did not read this:

Quote Post #1: "the Studebaker V8s came with a large threaded stud on top of one or two head bolts."

Quote Post #2: "Stud 7/16 -14 X 4 15/16" 532446 (2)"

This is not your ordinary Stud, it is a Cap Screw with a smaller Stud on top of the Hex head for mounting equipment to the Head ("Bolt") Cap screw.

[Mike Van Veghten]

I got mine from the Stude Int. guys.
Nice fastener, well made. Do not know its grade, but they have a nice "ring" to them when tapped. The threads (both ends) "appear" to be rolled.

Or is it my post you didn't like...

Mike

P.s. - It IS a double ended fastener...which is what you asked about.

[jlmccuan]

ARP has a stud kit that includes them for R2/3 engines. They will sell them individually as well.

[SN-60]

Calm down now boys!!...If anyone wants to install, say, an R2 sidemount supercharger bracket on a Stude V8, and doesn't have the aforesaid special factory mounting bolts,....simply use two MID length Stude V8 head bolts. (Studebaker used three different length head bolts to fasten a cylinder head onto their V8's.) Install four flat washers on this bolt (between the head and bracket) and you're "Good To Go"!!

[bezhawk]

I see someone edited their post, so my post later on pointing out incorrect statements seems moot. so I deleted it.