Pinned rocker stud - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hjewell2 · 07-13-2019, 11:30 PM

How do you remove a pinned rocker stud on a SBC head.. The rocker stud is cross threaded and needs to be removed..

vince1 · 07-14-2019, 01:38 PM

https://www.youtube.com/watch?v=WCkf95HpGs4

If your threads are totally stripped I think I'd start by welding something on to be able to pull it out.

As a last resort drill it out and tap for a new stud. It might be best left for a machine shop to have it done right.

What do you mean by pinned? Maybe I am missing something here as I am a newbie to the SBC.

sweetk30 · 07-14-2019, 01:45 PM

older sbc heads had pressed in rocker studs . sometimes they would start to pull up and out . the trick was hammer it back in . cross drill a hole and insert a roll pin to lock it in place .

**Captainfab** · 07-14-2019, 11:12 PM

You will have to drive out the roll pin and then pull the damaged stud. Depending on the stud, this may require pulling the head unfortunately.

GASoline71 · 07-16-2019, 12:05 PM

Quote:

Originally Posted by Captainfab

You will have to drive out the roll pin and then pull the damaged stud. Depending on the stud, this may require pulling the head unfortunately.

This is correct. Had to do that with a set of pinned heads I had on a 350 in a 79 K25. Only way I could access everuthing to drive the pins out was to remove the head and have it on my bench.

Gary

hjewell2 · 07-16-2019, 05:42 PM

Quote:

Originally Posted by GASoline71

This is correct. Had to do that with a set of pinned heads I had on a 350 in a 79 K25. Only way I could access everuthing to drive the pins out was to remove the head and have it on my bench.

Gary

They didn't drill it all the way through only50% so I can not drive the roll pin out..

Tom · 07-16-2019, 06:00 PM

Quote:

Originally Posted by hjewell2

They didn't drill it all the way through only50% so I can not drive the roll pin out..

Da fuq?
Thats some half ass stuff right there. I'd drill the pin out, and keep going till its a full hole and not a half.

geezer#99 · 07-16-2019, 06:32 PM

[QUOTE=hjewell2;8559782]They didn't drill it all the way through only50% so I can not drive the roll pin out..[/QUOT

That’s the cheap method!
Done that way 90% of the time.
Can’t drill it out though.
The pin is likely hardened.

sweetk30 · 07-16-2019, 06:44 PM

time to bump the performance up and fix the problem with new heads .

hjewell2 · 07-16-2019, 07:51 PM

Quote:

Originally Posted by sweetk30

time to bump the performance up and fix the problem with new heads .

Thats what im afraid of,, its a shame too cant remember the head number but gm made them for two years only 70and 71 76cc with 2.02 and 1.60 valves from the factory.
Someone took the time to port the heads also. I know gm made tons of 76cc heads but these are big valve and good thick casting

sweetk30 · 07-16-2019, 07:59 PM

o.k. maybe worth a shop taking the time to fix them and swap to screw in studs and guide plates .

GASoline71 · 07-17-2019, 12:13 PM

Yep... those can be modified to accept screw in studs.

Gary

**MySons68C20** · 07-17-2019, 03:29 PM

If you pull the heads the machine shop should be able to drill through on the backside so the pin can be pushed out.
I'm talking out my a** a bit here since I've never done it but just my .02
Please let us know what you end up doing.

hjewell2 · 07-17-2019, 06:16 PM

Quote:

Originally Posted by MySons68C20

If you pull the heads the machine shop should be able to drill through on the backside so the pin can be pushed out.
I'm talking out my a** a bit here since I've never done it but just my .02
Please let us know what you end up doing.

Pulled heads dropped off at Reichert racing Sold both kids , Gave blood , shaved the hair off my back dropped it off to the wig company.. Pick them up next week. didn't have the heart to throw them away.

screw in studs
and guides. They said I"am the last person in Michigan to save the cast heads..

sweetk30 · 07-17-2019, 07:46 PM

well you also know what this combo does and how it works so why not leave it alone and fix this goof and be done with no extra re-tuning / tweeking / pulling what hair you have out getting a whole new combo to run .

toolboxchev · 07-21-2019, 03:21 AM

Quote:

Originally Posted by hjewell2

Pulled heads dropped off at Reichert racing Sold both kids , Gave blood , shaved the hair off my back dropped it off to the wig company.. Pick them up next week. didn't have the heart to throw them away.

screw in studs
and guides. They said I"am the last person in Michigan to save the cast heads..

Well I must have been the second to the last guy, unfortunately I left Michigan first. What about your shirt? Just kidding.

The Shop I use says the same thing. I think they did some good work, I have not brought anything back to them!

Most likely the Cast heads are still out there performing once they get hardened seats, viton seals and the other problems addressed.

07-13-2019, 11:30 PM	#1
hjewell2 Registered User Join Date: May 2011 Location: mich Posts: 654	Pinned rocker stud How do you remove a pinned rocker stud on a SBC head.. The rocker stud is cross threaded and needs to be removed..

07-14-2019, 01:38 PM	#2
vince1 Registered User Join Date: Jan 2013 Location: Calgary Alberta Posts: 1,164	Re: Pinned rocker stud https://www.youtube.com/watch?v=WCkf95HpGs4 If your threads are totally stripped I think I'd start by welding something on to be able to pull it out. As a last resort drill it out and tap for a new stud. It might be best left for a machine shop to have it done right. What do you mean by pinned? Maybe I am missing something here as I am a newbie to the SBC.

07-14-2019, 01:45 PM	#3
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Pinned rocker stud older sbc heads had pressed in rocker studs . sometimes they would start to pull up and out . the trick was hammer it back in . cross drill a hole and insert a roll pin to lock it in place . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

07-14-2019, 11:12 PM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: Pinned rocker stud You will have to drive out the roll pin and then pull the damaged stud. Depending on the stud, this may require pulling the head unfortunately. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

07-16-2019, 06:32 PM	#8
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,513	Re: Pinned rocker stud [QUOTE=hjewell2;8559782]They didn't drill it all the way through only50% so I can not drive the roll pin out..[/QUOT That’s the cheap method! Done that way 90% of the time. Can’t drill it out though. The pin is likely hardened.

07-16-2019, 06:44 PM	#9
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Pinned rocker stud time to bump the performance up and fix the problem with new heads . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

07-16-2019, 07:59 PM	#11
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Pinned rocker stud o.k. maybe worth a shop taking the time to fix them and swap to screw in studs and guide plates . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

07-17-2019, 03:29 PM	#13
MySons68C20 Senior Member Join Date: Sep 2014 Location: Wenatchee, Wa Posts: 897	Re: Pinned rocker stud If you pull the heads the machine shop should be able to drill through on the backside so the pin can be pushed out. I'm talking out my a** a bit here since I've never done it but just my .02 Please let us know what you end up doing.

07-17-2019, 07:46 PM	#15
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Pinned rocker stud well you also know what this combo does and how it works so why not leave it alone and fix this goof and be done with no extra re-tuning / tweeking / pulling what hair you have out getting a whole new combo to run . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.



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