Which vacuum advance?
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Elder User
Joined: Dec 2006
Posts: 881
Likes: 1
From: Sudbury, ONT.
Which vacuum advance?
I need to replace the vacuum advance on my distributor. It's a '72ish points style distributor, converted to Pertronix. I called my local parts store and they told me there were three different options for an advance unit. I can't find any numbers on the distributor to use as a reference. Can someone throw a part number at me that I can pass along to the parts store? Thanks!
Laughing Gas
Joined: Mar 2011
Posts: 811
Likes: 1
From: West Central Southern MN
You should be able to find a number on it. Did you remove the advance assembly from the distributor?
What is converted to pertronix? As far as I knew they only sold whole replacement distributors
What is converted to pertronix? As far as I knew they only sold whole replacement distributors
Laughing Gas
Joined: Mar 2011
Posts: 811
Likes: 1
From: West Central Southern MN
I see. Shouldn't have anything to do with the vacuum advance failure I assume. Probably a leaky diaphragm... I would still think there is a part number on there.
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Thread Starter
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Elder User
Joined: Dec 2006
Posts: 881
Likes: 1
From: Sudbury, ONT.
Sorry I wasn't clear with my description. Yes I put a Pertronix unit in my Ford 'points style' distributor. I haven't found a number, where would it be?
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
One thing to think about, throwing it out there - if the vacuum advance diaphragm is shot, it stands to reason at least the possibility the rest of the distributor is well worn with high mileage. Might be money ahead, hassle, just replacing the whole thing?
The distributor number should be stamped or engraved right on the side.
The distributor number should be stamped or engraved right on the side.
Laughing Gas
Joined: Mar 2011
Posts: 811
Likes: 1
From: West Central Southern MN
Not sure if this will help or not. I took a look at my uncle's 87 460 and this is what I found.
It is kind of hard to make out the numbers on the tag so this is what they read.
7C 11
E3HE
12127
BA
I am not sure if this tag is for the advance or for the distributor itself, but this is what I found.
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It is kind of hard to make out the numbers on the tag so this is what they read.
7C 11
E3HE
12127
BA
I am not sure if this tag is for the advance or for the distributor itself, but this is what I found.
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Elder User
Joined: Dec 2006
Posts: 881
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From: Sudbury, ONT.
My distributor is not very old, maybe 15 years old, but less than 10 000 miles of driving. I bought it as a reman unit. I simply went into the parts store and ordered a distributor for a 72 460 because I knew it would have points. Later on I swapped the points for the Pertronix unit. The diaphragm is leaking. When I called the parts store for a replacement advance unit for the 72 distributor, is when they told me there was three options. My distributor housing has been painted a couple times, so now I can't see numbers anywhere. 
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Laughing Gas
Joined: Mar 2011
Posts: 811
Likes: 1
From: West Central Southern MN
The number may not even be on the dist. It may have only been on a stamped on a tag like mine, and maybe got lost/thrown away when it was painted.
Best advice: Buy all three and compare shape and mounting surfaces. Return the two you don't need.
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Best advice: Buy all three and compare shape and mounting surfaces. Return the two you don't need.
Sent from my iPad using IB AutoGroup
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