The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 06-15-2024, 01:56 AM   #1
skokie
Registered User
 
skokie's Avatar
 
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,354
What size is the distributor hold down bolt

Is it distributor hold down bolt 1/2 or 7/16?

Thanks
__________________
RIP to my son Dylan. 5/17/2002 - 8/18/2018
If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started.
https://slothforpedcancer.org



68 build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=223234
skokie is offline   Reply With Quote
Old 06-15-2024, 09:43 AM   #2
Dashman
Active Member
 
Join Date: Apr 2021
Location: Santa Cruz, NM
Posts: 115
Re: What size is the distributor hold down bolt

It should be 3/8-16 with 9/16 hex head.
Dashman is offline   Reply With Quote
Old 06-15-2024, 09:54 AM   #3
1967GMCC20
Registered User
 
1967GMCC20's Avatar
 
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 227
Re: What size is the distributor hold down bolt

OEM 3/8 but various lengths, depending on distributor, clamp style, and manifold.

Always check that distributor has clearance to oil pump shaft by installing without gasket. Should sit flush on manifold, then, add your distributor gasket.
1967GMCC20 is offline   Reply With Quote
Old 06-15-2024, 11:49 AM   #4
71CHEVYSHORTBED402
Senior Member
 
71CHEVYSHORTBED402's Avatar
 
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,322
Re: What size is the distributor hold down bolt

Mine has a: (GR 5) 9/16” hex flange head bolt. The bolt threads are 3/8-16 x 9/16”, and the head is stamped “E”.
__________________
Tony
71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025
71CHEVYSHORTBED402 is offline   Reply With Quote
Old 06-15-2024, 12:00 PM   #5
Already Gone
70+ ( Old Skool Club )
 
Already Gone's Avatar
 
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,143
Re: What size is the distributor hold down bolt

From experience use a factory bolt and clamp as some of the aftrmarket ones are crap and will loosen and let your distributor move around.
__________________
1972 C10 Custom/Deluxe 613 Highlander 406/700R4
1999 White Tahoe LS 4x2 with Z56 Police Package
1992 K1500 GMC Suburban

Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601

" Circumsatances Do Not Change Responsibility "

" The Sky is not the Limit, Your Mind is." Marilyn Monroe ..


RIP Charlie Watts 1941 - 2021
Already Gone is offline   Reply With Quote
Old 06-15-2024, 12:25 PM   #6
1967GMCC20
Registered User
 
1967GMCC20's Avatar
 
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 227
Re: What size is the distributor hold down bolt

Quote:
Originally Posted by Already Gone View Post
From experience use a factory bolt and clamp as some of the aftrmarket ones are crap and will loosen and let your distributor move around.
Factory clamps are always better.
1967GMCC20 is offline   Reply With Quote
Old 06-15-2024, 01:50 PM   #7
skokie
Registered User
 
skokie's Avatar
 
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,354
Re: What size is the distributor hold down bolt

Thanks for the info. Going to pick up a set of these when I need to adjust timing etc.
https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1
__________________
RIP to my son Dylan. 5/17/2002 - 8/18/2018
If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started.
https://slothforpedcancer.org



68 build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=223234
skokie is offline   Reply With Quote
Old 06-15-2024, 04:13 PM   #8
RustyPile
Registered User
 
RustyPile's Avatar
 
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,841
Re: What size is the distributor hold down bolt

Quote:
Originally Posted by skokie View Post
Thanks for the info. Going to pick up a set of these when I need to adjust timing etc.
https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1
Why go to the internet and wait a week and possibly pay shipping??? O'Reillys, NAPA, CarQuest and most parts suppliers have them on the shelf for immediate purchase...
RustyPile is offline   Reply With Quote
Old 06-15-2024, 04:23 PM   #9
1967GMCC20
Registered User
 
1967GMCC20's Avatar
 
Join Date: Apr 2022
Location: Medina, Ohio
Posts: 227
Re: What size is the distributor hold down bolt

Quote:
Originally Posted by RustyPile View Post
Why go to the internet and wait a week and possibly pay shipping??? O'Reillys, NAPA, CarQuest and most parts suppliers have them on the shelf for immediate purchase...
Not to mention every flea market, swap meet.
1967GMCC20 is offline   Reply With Quote
Old 06-15-2024, 07:15 PM   #10
skokie
Registered User
 
skokie's Avatar
 
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,354
Re: What size is the distributor hold down bolt

Quote:
Originally Posted by RustyPile View Post
Why go to the internet and wait a week and possibly pay shipping??? O'Reillys, NAPA, CarQuest and most parts suppliers have them on the shelf for immediate purchase...
Yep. Just threw that out there as what I was looking for.
Thanks!
__________________
RIP to my son Dylan. 5/17/2002 - 8/18/2018
If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started.
https://slothforpedcancer.org



68 build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=223234
skokie is offline   Reply With Quote
Old 06-16-2024, 01:28 AM   #11
71CHEVYSHORTBED402
Senior Member
 
71CHEVYSHORTBED402's Avatar
 
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,322
Re: What size is the distributor hold down bolt

Quote:
Originally Posted by skokie View Post
Thanks for the info. Going to pick up a set of these when I need to adjust timing etc.
https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1
Mine is similar the bottom one, it's ancient and does the trick. If I remember right, it's the only tool I have that remotely works for the lower RH hood hinge bolt with the blower and inner fender mounted.
__________________
Tony
71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025
71CHEVYSHORTBED402 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:43 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com