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Mod | | | Forums66 Topics128,104 Posts1,056,201 Members48,436 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: May 2010 Posts: 132 Wrench Fetcher | | Wrench Fetcher Joined: May 2010 Posts: 132 | The distributor is not locked down snugly. There's a big bolt head, and a sideways screw. It will still rotate 1/8 inch or so where hooked up to the vacuum advance. It runs better when I move it all the way counterclockwise. Do I need to replace the vacuum advance assembly? Or is this standard normal? | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | you should be able to grab the dizzy and rotate it by hand, that's the allowance for the advance, it runs best when you set it with a timing light, then let the advance can [and internal mechanical advance] do the moving .... check the shop manual
Bill | | | | | Joined: Mar 2010 Posts: 10,280 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,280 | There is a place on the base of the vacuum can (a pivot) which wears, causing excess slop. There is some amount of movement (minor slop) on a new one.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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