LT4 Rocker Studs
Thread Starter
Racer
Joined: Jan 2001
Posts: 425
Likes: 0
From: Frederick MD
LT4 Rocker Studs
Replacing my LT4 springs and trying to find a spring compressor that fits the stock LT4 Rocker studs, all sources tell me that they are 3/8 but when I measure the diameter it looks more like 5/16. Can anyone help out.
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
Cruise-In II Veteran
Re: LT4 Rocker Studs (tdock)
They are actually a 10mm. All of the screw on tools that I have seen only work with 3/8 or 7/16 studs. You may have to use one of the crappy spring compressors that do not screw on. It will take a lot longer though.
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
Cruise-In II Veteran
Re: LT4 Rocker Studs (tdock)
If you did it probably would have been to an LT1 owner looking to upgrade to roller rockers. Otherwise I am not sure what post you would be refering to.
Thread Starter
Racer
Joined: Jan 2001
Posts: 425
Likes: 0
From: Frederick MD
Re: LT4 Rocker Studs (Vette92)
Finally found the thread, my mistake it was recommended by lcvette for MarkLT1
"-Comp ProMag 1.6 Rocker arms
-Engine Works Ti Retainers
-Engine Works Hardened Pushrods
-Engine Works Billet Double Roller timing Set
-Engine Works Rocker Studs
-Engine Works Guide Plates
-Engine Works 0.550" Springs with Dampener
-Meziere Electric Water Pump
-and for the cam, I will use the GM Hot Cam"
[Modified by tdock, 2:02 PM 9/3/2002]
"-Comp ProMag 1.6 Rocker arms
-Engine Works Ti Retainers
-Engine Works Hardened Pushrods
-Engine Works Billet Double Roller timing Set
-Engine Works Rocker Studs
-Engine Works Guide Plates
-Engine Works 0.550" Springs with Dampener
-Meziere Electric Water Pump
-and for the cam, I will use the GM Hot Cam"
[Modified by tdock, 2:02 PM 9/3/2002]
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Re: LT4 Rocker Studs (Vette92)
As was mentioned before, the factory LT4 rocker arm studs are 10mm. If you're switching rocker arms (stock LT4 arms are non-adjustable), then you'll need to switch studs too. After you switch the studs to 3/8" or 7/16", you can then use a screw-on type compressor to remove the springs.
Jim Mason
'96 Grand Sport #007
Jim Mason
'96 Grand Sport #007
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: LT4 Rocker Studs (96GS#007)
You could take one 3/8 stud and keep replacing the stud on the spring your changing. After you change the spring, put the 10mm stud back in. All the screw in studs have 7/16 thread on the lower portion that goes into the head.
Thread Starter
Racer
Joined: Jan 2001
Posts: 425
Likes: 0
From: Frederick MD
Re: LT4 Rocker Studs (RichS)
I went ahead and ordered some 3/8 studs so I could do the stud swap method if I need to, but the salesman at Jegs couldn't answer what RichS just did about the thread size on the heads. Also picked up a pry bar style spring compressor locally which works ok, just removed #1 springs.
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