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5 iffy head studs....
Posted by: Grandpacorvair ()
Date: February 03, 2018 07:07AM

The tops of these studs are..damaged. There is enough thread left to mount the head properly. The case is also missing two studs but the threads are good

What would you do? recommendations appreciated.

.003 over size studs? use original size and locktite?

Replacing 7 studs with oversize is going to put a significant dent in the budget!

Kerry Borgne
Birmingham, Michigan

1963 Spyder Convertible

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Re: 5 iffy head studs....
Posted by: Wagon Master ()
Date: February 03, 2018 07:11AM

If the threads looked good I would reinstall the studs with red Loctite and test torque to 35 Ft. Lb.
How those barrels cleaned up after honing below the ridge would concern me more.

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Re: 5 iffy head studs....
Posted by: Chilly Willy ()
Date: February 03, 2018 07:12AM

Replace the studs. Do a stress test before installing the cylinders.




The Corvair, Keeping Nader Notorious winking smiley


Will
Northern California

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Re: 5 iffy head studs....
Posted by: Grandpacorvair ()
Date: February 03, 2018 07:16AM

The cylinders are going out for boring....simple honing is not an option..

Kerry Borgne
Birmingham, Michigan

1963 Spyder Convertible

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Re: 5 iffy head studs....
Posted by: vairmech ()
Date: February 03, 2018 07:53AM

I have used studs that looked like that before.

If you feel uncomfortable with those stop over and look at my select used studs that have full threads. Removal and installation can be arranged.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: 5 iffy head studs....
Posted by: Frank DuVal ()
Date: February 03, 2018 08:53AM

As to the missing threads, all of here in the east use studs that look like that! Of course good looking studs with all their threads are best, but if a stud with missing threads is already installed and passes a torque test, they stay.thumbs up

Torque test can be as simple as a piece of 1/2" emt cut to length, tighten nut on stud to 30 ft-lbs or so.

Frank DuVal

Fredericksburg, VA

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Re: 5 iffy head studs....
Posted by: jjohnsonjo ()
Date: February 03, 2018 09:06AM

Mine looked like that. I ran a NEW die over the existing threads, then did a test pull. No problems.

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: 5 iffy head studs....
Posted by: Bob Helt ()
Date: February 03, 2018 11:08AM

Use the studs that are there. If you replace any, use std size. Stress test them as already suggested. If threads are there, double nut them.
Bob Helt

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Re: 5 iffy head studs....
Posted by: Timothy Shortle ()
Date: February 03, 2018 11:48AM

I like the idea of putting an acorn nut after the head is properly torqued with the idea of keeping the threads protected. Of course this does not answer your question nor is it helpful if the threads are already gone.

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Re: 5 iffy head studs....
Posted by: JimBrandberg ()
Date: February 05, 2018 04:01AM

I generally leave them if they don't come out but replace them with std ones with better threads if they do come out. I would not go to oversize studs unless I try a std on and it goes in too easy. Getting good used ones from Ken sounds like a good idea.
Jim Brandberg
Isanti, MN
CorvairRepair.com

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