Rocker Stud

[cfalson]

No luck pulling stud out, threads strip and the stud does not move, will start tear down today. Pulling head for machine shop to mill out and install thread in.
While I am at it, I was thinking of replacing sender since restoration it's been action up. Can anyone comment on the accuracy of the Wells TU-5
Thanks,
Charlie

 

[JohnZ]

No luck pulling stud out, threads strip and the stud does not move, will start tear down today. Pulling head for machine shop to mill out and install thread in.
While I am at it, I was thinking of replacing sender since restoration it's been action up. Can anyone comment on the accuracy of the Wells TU-5
Thanks,
Charlie

The TU-5's vary, just like the rest of them, some are closer than others. I have a Standard ST-6 in mine, and it's dead on the money (pure luck, I think).

 

[Mike McKown]

No luck pulling stud out, threads strip and the stud does not move, will start tear down today. Pulling head for machine shop to mill out and install thread in.
While I am at it, I was thinking of replacing sender since restoration it's been action up. Can anyone comment on the accuracy of the Wells TU-5
Thanks,
Charlie

You must have an earlier thread I missed.

I have pulled them out by center drilling the stud and tapping. Run a 5/16's bolt in it with a nut run up on the threads and then run the nut down on the bolt to jack the stud out.

 

[Tom Bryant]

You must have an earlier thread I missed.

I have pulled them out by center drilling the stud and tapping. Run a 5/16's bolt in it with a nut run up on the threads and then run the nut down on the bolt to jack the stud out.

That was what I suggested in the original thread too. Did you try that?

If I was going to have to pull the head I'd pull both heads and replace them all and be done with it. Then you won't be pulling it down again to do another one on the same head or on the other side later.

Tom

 

[ChuckG]

Why are you pulling a head to replace one stud?

Pull the old one using the washer/nut trick. Buy a threaded stud at any major auto parts store, tap the hole, and screw in the new stud. You can do it in an hour and not remove the head.

IF you want the fancy hex studs, you do have to remove the head and mill the top of the boss flat. Don't need to do that with a plain old threaded stud. I posted a pic in your other thread. Chuck

 

[cfalson]

Have tried to run a 3/8x24 but thread strips and stud does not budge. Will try again this weekend with a course thread and a hardened nut, better die, still have a 1/2 of untouched stud I can tap.
Thanks for all the encourgement.

 

[cfalson]

Success, using a 5/16x16 machinist die and hardened nut stud backed right out. Magnetized the tap 7/16x14 so chips would cling and presto clean tapped threads, inspected area for chips, assembled (with locktite sealer) checked lifter adjustment, put valve covers back on and fired her up. Sounded great, on to rebulding the P/S control valve and mechanical work for the season will be done.
I want to thank all who encouraged and helped with this one, save a few days of work pulling the head for no reason.

 

[ChuckG]

Excellent. It's simple.

I believe I mentioned that I ended up doing ALL 16 studs in my 63 that way, after "my buddy" at the machine shop INSISTED that I replace the originals, and that he had NEVER had a stud pull out.

Well, I proved that scenario to be false, and I told him so afterwards. Chuck

 

[motorman]

Have tried to run a 3/8x24 but thread strips and stud does not budge. Will try again this weekend with a course thread and a hardened nut, better die, still have a 1/2 of untouched stud I can tap.
Thanks for all the encourgement.

make sure someone did not install a set screw in the stud boss to lock the stud. i have use washers and a good quaility nut,lubed with never seize to pull lots of rocker arm studs. you will need a tap with a "pilot" ground on the end to make sure the tap starts straight.

 

[ChuckG]

And here's the pic again of the pilot, or jig that Clem describes. Chuck

 

[cfalson]

Where can you buy the tap guide or is it a home tool

 

[ChuckG]

I borrowed it from a friend, so they are available. Don't remember who manufactured it. Chuck

 

[JohnZ]

Comp Cams makes one - #CCA-5306; Rocker Stud Puller and Tap Guide.