3/8...7/16....HEAD BOLT ?????
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,305
Likes: 11
From: Savannah Ga.
3/8...7/16....HEAD BOLT ?????
I have a LT1 motor.....with 3/8 Roller rocker studs...My question can I use 7/16 studs or not a good ideal.....will they come loose or shoulld i stick to 3/8 :conehead I'm up grading to 1.6 or 1.7 RRs
[Modified by redcorvettedave, 12:45 PM 2/10/2004]
[Modified by redcorvettedave, 12:45 PM 2/10/2004]
Team Owner
Joined: Aug 2000
Posts: 42,934
Likes: 18
From: Sydney, Australia
CI 6-7-8-9-10 Veteran
St. Jude Donor '07-'08-'09-'10-'11-'12-'13-'14-'15-'16-‘17, '22
Re: 3/8...7/16....HEAD BOLT ????? (redcorvettedave)
I understood that you had to get the threads in your heads modified to take the 7/16" studs. The main benefit being that they are a stronger setup.
Drifting
Joined: Feb 2003
Posts: 1,978
Likes: 2
From: San Antonio Texas
Re: 3/8...7/16....HEAD BOLT ????? (redcorvettedave)
You don't have to rethread; they will fit, and are stronger. If you are going to get new rockers anyway, I would use 7/16. Check to get proper ones, depending on useing guide-plates or not. I you use self-aligning rockers, don't use guide-plates. If you use standard rockers (not self-aligning), use guide-plates, and hardened pushrods.
:chevy
:chevy
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: 3/8...7/16....HEAD BOLT ????? (Red 90 L98 Coupe)
I understood that you had to get the threads in your heads modified to take the 7/16" studs. The main benefit being that they are a stronger setup.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: 3/8...7/16....HEAD BOLT ????? (scorp508)
I understood that you had to get the threads in your heads modified to take the 7/16" studs. The main benefit being that they are a stronger setup.
The old iron heads had press-in 3/8" studs. The aluminum heads have threads for a 3/8" shank, but that is the same size shank on the 7/16" studs. The part that screws into the head is smaller than the actual rocker stud above it.
The old iron heads had press-in 3/8" studs. The aluminum heads have threads for a 3/8" shank, but that is the same size shank on the 7/16" studs. The part that screws into the head is smaller than the actual rocker stud above it.
Jake
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: 3/8...7/16....HEAD BOLT ????? (JAKE)
Huh?
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: 3/8...7/16....HEAD BOLT ????? (scorp508)
Huh?
Ok. The lower part of the rocker stud part that screws into the cylinder head is 3/8" no matter if it is a 3/8" stud or 7/16" stud on the top side for the rocker. :)
Ok. The lower part of the rocker stud part that screws into the cylinder head is 3/8" no matter if it is a 3/8" stud or 7/16" stud on the top side for the rocker. :)
Every SB head I've come across that has screw in studs has 7/16 x 14 threads on the end that screws into the head. In fact, Big Block studs, which are 7/16th on both ends (7/16th X 24 top and 7/16th x 14 bottom), screw right in to the SB head and are a direct replacement/upgrade.
The only Chevy studs that I know of that are 3/8th (in the head) are for the Mark V and VI big block engines.
Jake
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: 3/8...7/16....HEAD BOLT ????? (JAKE)
:iagree:
The base of my stock rocker studs was 7/16" but the top was 3/8"; my 7/16" rocker studs are 7/16" top & bottom.
When going to 1.6:1 RRs upgrading to 7/16" studs is a good idea to assure valve train stability; with 1.7:1 RRs it is an even better idea. When the studs deflect under load you lose valve lift.
The base of my stock rocker studs was 7/16" but the top was 3/8"; my 7/16" rocker studs are 7/16" top & bottom.
When going to 1.6:1 RRs upgrading to 7/16" studs is a good idea to assure valve train stability; with 1.7:1 RRs it is an even better idea. When the studs deflect under load you lose valve lift.