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Old Today, 01:56 AM   #1
skokie
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What size is the distributor hold down bolt

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

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Old Today, 09:43 AM   #2
Dashman
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Re: What size is the distributor hold down bolt

It should be 3/8-16 with 9/16 hex head.
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Old Today, 09:54 AM   #3
1967GMCC20
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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.
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Old Today, 11:49 AM   #4
71CHEVYSHORTBED402
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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”.
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Old Today, 12:00 PM   #5
Already Gone
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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.
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Old Today, 12:25 PM   #6
1967GMCC20
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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.
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Old Today, 01:50 PM   #7
skokie
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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
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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
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