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Question for the guru's on head stud install
Posted by: 2ragtops ()
Date: June 26, 2020 07:40AM

Has anyone ever, or is it even possible to install a new upper stud without

removing the head. This is a "blind" hole, so no danger of metal inside the engine.

Your thoughts

Bob Bauer

Show-Me Corvairs

1966 Monza Convert 140 P/G with A/C, plastic wheel with tele-column am-fm posi-traction
1966 Corsa Convert 180 wood wheel tele-column am-fm sport steering posi-traction
1965 Corsa Coupe Crown V8 temporarily red lined for repair
House Springs, Missouri

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Re: Question for the guru's on head stud install
Posted by: davemotohead ()
Date: June 26, 2020 08:18AM

Replace it for what reason? And Just remove and Replace? Or are the treads pulled out and it needs a time sert?







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Question for the guru's on head stud install
Posted by: JimBrandberg ()
Date: June 26, 2020 09:44AM

I reinstall studs with red Loctite all the time with the head in place as long as they merely unscrewed with no aluminum on them.
I use a rocker stud with a ball bearing inside so it will release once the stud is in. I can't take credit for that idea, it's something I picked up on this forum.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Question for the guru's on head stud install
Posted by: MattNall ()
Date: June 26, 2020 10:03AM

In 20 years on this forum I have learned soo many "tricks" it's scary!I thought I knew all the quick /shortcuts in 1999.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Question for the guru's on head stud install
Posted by: Chet Jr ()
Date: June 26, 2020 10:03AM

An oversized stud might be a useful option IF the original stud did NOT just unscrew.

If it did cleanly unscrew I’d use Jim’s suggested method above.

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Re: Question for the guru's on head stud install
Posted by: 2ragtops ()
Date: June 26, 2020 10:38AM

The stud will not longer tighten, but I have not removed it yet, but I suspect the threads will come out as well.

I was planning on using an oversize. I wanted thoughts on doing it without removing the head.

Bob Bauer

Show-Me Corvairs

1966 Monza Convert 140 P/G with A/C, plastic wheel with tele-column am-fm posi-traction
1966 Corsa Convert 180 wood wheel tele-column am-fm sport steering posi-traction
1965 Corsa Coupe Crown V8 temporarily red lined for repair
House Springs, Missouri

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Re: Question for the guru's on head stud install
Posted by: flat_six ()
Date: June 26, 2020 10:40AM

Following.

Is it advisable, when removing head studs, to heat the threaded area of the block?

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Re: Question for the guru's on head stud install
Posted by: davemotohead ()
Date: June 26, 2020 12:22PM

Well ya gotta remove the stud first before deciding on what repair is best?







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Question for the guru's on head stud install
Posted by: vairmech ()
Date: June 26, 2020 04:38PM

It sounds like you have pulled threads, If you do then you will have to put in either a timesert or a helicoil. Can this be done with the head on? Yes. You will need a 12" long drill bit of the size needed for whatever thread restoration you do. DO NOT get an oversized stud! Do get a new 3/8-16 die and cut the threads on the stud you just pulled out then put some high temp loctite on the threads and install the stud. Don't get in a hurry and try to get the double nuts off before the loctite sets up.

If you put a thread insert in the engine block even the standard stud thread will lock up half way in and you will NOT get it out without drilling

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Question for the guru's on head stud install
Posted by: JimBrandberg ()
Date: June 27, 2020 06:04AM

I would want to remove shrouding until I could see what's going on.

I'm inclined to think if the stud is pulling the threads out you may as well keep pulling as the aluminum that's left doesn't lend mechanical grip anyway. Just my opinion and I could be wrong.

Like Ken said you have to run a die over the stud threads with an insert. They are special for going in the aluminum and not quite 3/8-16. The stud is VERY HARD for reforming threads. I'd sure hate to try and drill one.

Yes heating the aluminum can help when trying to get studs to unscrew but the heat dissipates into the entire aluminum piece like crazy. I had one where someone cut all the studs off, getting them all out was an adventure.

A stud that is pulling threads out is a different animal from one that has simply unscrewed. Aluminum on the stud threads is a horrible sinking feeling.

I'd sure like to read more if I'm off base or missing something. Sometimes I just come up with my own way and I'm misguided.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Question for the guru's on head stud install
Posted by: corventure Dave ()
Date: June 27, 2020 04:57PM

Sounds like a plan. However I have always felt the cylinder fins were in the way. Especially on the 1960 jug's. So I have always just puled the head and adjoining cylinder- piston assembly.
Heck of a big job, but gave me all the access I needed.

Corventure Dave

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Re: Question for the guru's on head stud install
Posted by: 2ragtops ()
Date: June 27, 2020 06:10PM

I was hoping to leave the head on, but while I am somewhat skilled as a shade tree mechanic, I probably would feel more comfortable having a good view and plenty of access to what I am doing

Bob Bauer

Show-Me Corvairs

1966 Monza Convert 140 P/G with A/C, plastic wheel with tele-column am-fm posi-traction
1966 Corsa Convert 180 wood wheel tele-column am-fm sport steering posi-traction
1965 Corsa Coupe Crown V8 temporarily red lined for repair
House Springs, Missouri

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Re: Question for the guru's on head stud install
Posted by: jjohnsonjo ()
Date: June 27, 2020 07:19PM

Bob, I will share this with you, not to recommend it, but to share it. I will probably get flamed, but that's OK just sharing truth and personal experience. Many, many, many years ago, 1977, I was rebuilding my turbo engine. Everything was done and I was final torquing the heads. One of the upper middle ones stopped increasing at 25. I thought about my options as you have and decided to run it and see what happened. No WEB then for help. Keep in mind this a turbo with 110 heads on it that I drive very hard. I fully expected to have a leak or blow a gasket. Well it never happened. Three years ago the clutch went and I decided to rebuild and modify the engine some more. That stud that was on my mind for all these years almost fell out. There was no, zero sign of any head gasket leakage. A member of the group loaned me his time sert tools and it was corrected on this build. I checked all the other at tear down, not build up, and they all pulled at least 35. One thing for sure is you need a high quality new die to allow the stud threads to mate with the time sert.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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Re: Question for the guru's on head stud install
Posted by: 2ragtops ()
Date: June 27, 2020 07:27PM

thank you advice will be taken from all

Bob Bauer

Show-Me Corvairs

1966 Monza Convert 140 P/G with A/C, plastic wheel with tele-column am-fm posi-traction
1966 Corsa Convert 180 wood wheel tele-column am-fm sport steering posi-traction
1965 Corsa Coupe Crown V8 temporarily red lined for repair
House Springs, Missouri

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Re: Question for the guru's on head stud install
Posted by: 66vairman ()
Date: June 27, 2020 07:42PM

2ragtops Wrote:
-------------------------------------------------------
> thank you advice will be taken from all

PM sent

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Re: Question for the guru's on head stud install
Posted by: vairmech ()
Date: June 28, 2020 04:09AM

I have to laugh at some of the responses. Some state the very obvious, Yup, top shroud needs to come off! How many 1960 engines have you seen with pulled studs? Can't say I have ever seen any but if one did pull, that engine would have to have the cylinder removed as will Clark's full finned cylinders. Yes, that means pulling the head and just the cylinder though.

No flames intended just chuckling!

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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