Head Studs Problem

[B-O-B]

You might checkout the blue Loctite.
Loctite Threadlocker Blue 242 from Loctite Adhesives

 

[JSeery]

Just wondering why are you using studs? bolts solve all this.....X2 for permatex #2

bolts you know the way Henry assembled them.

Don't think so (assuming this is a pre-8ba block), until they decided to get cheap! Bolts will work in an earlier block, but I prefer the studs.

 

[37Flat]

Just wondering why are you using studs? bolts solve all this.....X2 for permatex #2

bolts you know the way Henry assembled them.

Well, I'm confused. The Ford Catalogue shows studs, not bolts. The engine is a 37, 21 stud 221. Where would one get the proper bolts?

The studs I'm using were purchased from C&G, they have a shoulder and they do screw in too much. That's what threw me off in the first place. Permatex seems to be the most viable option.

Thanks for the input.

 

[37Flat]

You might checkout the blue Loctite.
Loctite Threadlocker Blue 242 from Loctite Adhesives

It's my understanding that the blue would be able to be removed by simply using the tools the stud was put in place with, while the red hardens and can only be removed with heat of 500°, so they wouldn't turn if they're not seated to the shoulder, which is the only way to elevate them for the nuts to go on full thread. At least that's the plan unless someone tells me I'm wrong. It's happened before.

 

[rotorwrench]

Looking at Ford stud part numbers, it appears that they just had the three different lengths 6065/6/7 with various prefixes depending on application. In aviation, studs are special critters. They can be purchased in standard size, .003" OS, and .006" OS. Just the standard size is tighter fit than any regular bolt type fastener. They are generally set in at a specific torque to get proper protrusion height. I don't know if the OEM Ford studs were a tighter fit or not but I've been warned by more than one old timer not to chase the stud screw holes with a tap. They just use a plain bolt with a few flutes cut in with a carbide wheel to "clean" them. For aircraft engine work, they actually had oversize taps so a person could properly size the screw bore for the next oversize stud otherwise the stud may end up too tight and protrude too far when it reaches the torque limits.

I use Loctite 680 when I want something loose to stay where I put it. The green stuff is about the strongest stuff they make and they claim it can make up for .015" loose fits but I've never had to try it at that loose a fit.