Intake manifold bolt size
Thread Starter
Race Director
Joined: Nov 2006
Posts: 13,225
Likes: 7,823
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Intake manifold bolt size
Like the title says. What is the correct size for the intake manifold bolt on a gen1 SBC. 3/8th's 16 ×1inch?? or × 1 1/4 inch?? I really don't want to pull one at the moment. Just want to have everything ready when I do pull the heads.
Edlebrock alloy manifold if that makes a difference.
I have read that to long can cause some pushrod interference. That can't be a good thing.
What is correct?
Thanks guys.
Edlebrock alloy manifold if that makes a difference.
I have read that to long can cause some pushrod interference. That can't be a good thing.
What is correct?
Thanks guys.
Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,501
From: Little Rock AR
The 4 outer corners are blind holes so those bolts cant be too long or they will bottom out. Near the middle of each bank is 1 bolt hole that can interfear with a pushrod if the bolt is too long. That bolt needs to be the shortest. If you have lift brackets you might have a few longer bolts.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
1" should work for all holes........make sure you use PTFE ora sealer on the for center ones as they go to oil/valley...and will be a constant source of seepage if not sealed.
I pretty much only use this set anymore and the correct number for any other engine...12pt stainless.
https://www.summitracing.com/parts/a...rolet#overview
Jebby
I pretty much only use this set anymore and the correct number for any other engine...12pt stainless.
https://www.summitracing.com/parts/a...rolet#overview
Jebby
Thread Starter
Race Director
Joined: Nov 2006
Posts: 13,225
Likes: 7,823
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Thanks much.
