Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#484188 08/10/23 07:49 PM
Joined: Apr 2018
Posts: 18
Grease Monkey
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Grease Monkey
Joined: Apr 2018
Posts: 18
I had to replace the vacuum advance. The wires weren't removed from the cap. #1 cyl was put at TDC. The rotor position was marked, dist was removed and replaced in the same position. After installing the cap and wires, I had no fire. Long story short, the wires had to be moved 1 position CCW.

In the pic with the blue wires, #4 wire is on the post right next to the cap clip. It's been this way for the 5yr I've had the car. Now, #1 is next to the clip. With the tab at the bottom of the dist, and the slot in the oil pump, I didn't think it could go together wrong. From pics I've seen, the wire in in the correct position, now.

The car ran great before, and maybe better now. I'm just trying to figure out what happened.

[Linked Image from live.staticflickr.com] before

[Linked Image from live.staticflickr.com] now

Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station


Joined: Dec 2007
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ChatMaster - 4,000
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ChatMaster - 4,000
Joined: Dec 2007
Posts: 4,024
Likes: 99
My best guess is that either the distributor housing got rotated in the clamp mechanism while the vacuum unit was being replaced or the shaft got rotated when the assembly was re-installed into the engine.


Rusty

VCCA #44680
Joined: Apr 2018
Posts: 18
Grease Monkey
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Grease Monkey
Joined: Apr 2018
Posts: 18
The distributor housing is oriented the same, and the rotor/shaft is in the same position. That's why I'm puzzled...


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