broke rocker stud
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Pro
Joined: Dec 2006
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From: wilmington nc
broke rocker stud
on my 74 i had a rocker stud break today looks like someone before me put a single nut on one instead of an adjustiable cap should i upgrade studs or just get another set from chevrolet i'm not up to date on rocker studs it has double springs and a different cam i asume these are hydralic lifters but dont know how to tell i did a search and found how to adjust them if there hyd need a little help here thanks guys
Race Director
Joined: Nov 2002
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From: Taylor Michigan
Unfortunately they are not screw in studs. The missing posi-lock is probably down in the pan out of harms way. I have seen this before from tightning them too tight and actually streching the threads to a point they finally fail. Another reason some aftermarket stuff just dont work as good as the General originally made them. If thats a press in stud the head should probably come off as trash trying to repair the head will be all over to get the other 1/2 of the stud out. Just buy long slot stamped rockers next time. Thats all thats on L88`s!
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Joined: Sep 2005
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From: South of giving a damn
St. Jude Donor '11, '17
with ironcross.It looks like you have been making other mod to the engine, so it's time to step up the heads. If one broke due to someone over tightening it figure the odds that the other 15 were done properly. Cheapest way might be to find a set of Vortecs & a Vortec intake. I don't know the specs on your engine, you'll need to know that before buying new heads. The other path, if you are happy with the current performance level, would be to pull the rocker studs & have the heads machined for screw-ins, but that is kind of a waste on stock heads of little value anyway.
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From: wilmington nc
i have the posi lock it wont fit through the oil holes in the head i sat the rocker back on the stud and looks like i might have enough threads to put on a locking nut maby i could try that? looks like what someone did 2 studs over from the one that broke but that stud doesent look broke maby they just lost a posi lock lol if i try and unscrew the stud i will mess up the threads probly, i only had this car 3 weeks and i was impressed with the power i would like to know whats inside i just didnt want to find out quiet this quick
Drifting
Joined: May 2005
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From: BETHEL PARK PENNSYLVANIA
they make a tool to pull the rest of the stud out while leaving the heads on the car. pull the stud, and loctite the new 1 and press it in. something else to think about if you don't want to pull the heads off. you can drill thru the casting around the stud and straight thru the stud and out the other side and put a pin thru it. takes lots of time and patience. good luck
vc
vc
Racer
Joined: Jan 2005
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From: In the shop most of the time,,, And it BEER TIME somewhere
If you turn this engine very hard at all, most likley this will happen again. The stock studs just will not take that much. The fix for that is to remove the heads and have your favorite machine shop put in 7/16 th screw in studs. Yeah its a lot of work to do that, but if it does happen again, you might break the pushrod, bend valves, ect. Valve train is no where to skimp on parts in a motor that you want to run hard and live long.
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From: NorCal
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From: wilmington nc
wrencher i got you a picture does anyone know what these are ? my plans right now are to go back with screw in studs in the original heads but i'll look around tonight an see what other heads i can find if those are stock 1974 pistons cant i use about any head i want to? 
does anyone know what these are ? my plans right now are to go back with screw in studs in the original heads but i'll look around tonight an see what other heads i can find if those are stock 1974 pistons cant i use about any head i want to?
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From: wilmington nc
well i went to the machine shop wouldnt have been to bad just to replace studs but i have some other issues to the tune of broke inner valve springs new studs guide plates valve springs and a valve job comes to around 360-380 to much for these old heads thats allmost half the price of a set of dart heads so i'll get the darts i got my cam out i'll need some help iditifing that but this close i figure i might as well find out what bubba did in the bottom end while i'm at it the numbers on my cam are
engraved in the rear of cam 692130
next to gear 1517
between lobes cwc
between lobes e8
between lobes d1
and i really do appericate you gentlemen helping me with this david
engraved in the rear of cam 692130
next to gear 1517
between lobes cwc
between lobes e8
between lobes d1
and i really do appericate you gentlemen helping me with this david
