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keys for a 66

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Old Apr 6, 2011 | 07:09 AM
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From: killingworth ct
Default keys for a 66

I would like to know which keys to use for the door and for the ignition on a convertible, I am assuming the octogon shape is for the ignition and the round is for the door and the glove box, I am new to this as you can tell, thank you very much. Tom
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Old Apr 6, 2011 | 07:13 AM
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Not sure on the convertible but the coupe uses the octagon for the door and ignition. The round one is for the glove box. At least that is the way mine is set up and was before I bought the car.
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Old Apr 6, 2011 | 07:27 AM
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Starting in 1965, the Octagon key is used for the door and ignition, the round key is used for the glove box lock and the spare tire lock.
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Old Apr 6, 2011 | 07:35 AM
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Thanks guys, Tom
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Old Apr 6, 2011 | 03:46 PM
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That's very interesting information. My '66 has one key for the doors and a different key for the ignition....and I don't know if either fits the glove box!!
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Old Apr 6, 2011 | 06:47 PM
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Originally Posted by 62Jeff
Starting in 1965, the Octagon key is used for the door and ignition, the round key is used for the glove box lock and the spare tire lock.
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Old Apr 7, 2011 | 08:47 PM
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I think you will find that the hex key opens the doors, ignition and trunk...The round is the glove box key....I can cut keys if supplied with the codes
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Old Apr 7, 2011 | 08:50 PM
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Originally Posted by LB66383
That's very interesting information. My '66 has one key for the doors and a different key for the ignition....and I don't know if either fits the glove box!!
I'm guessing someone has changed the ignition cylinder and key for your car, possibly with another year. Like I said, I'm guessing.
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Old Apr 7, 2011 | 11:40 PM
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Originally Posted by Ironcross
I think you will find that the hex key opens the doors, ignition and trunk...The round is the glove box key....I can cut keys if supplied with the codes
Is there any way to reverse-engineer the codes? I have a non-original key, but the doors match the ignition.
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Old Apr 7, 2011 | 11:43 PM
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Originally Posted by Godholio
Is there any way to reverse-engineer the codes? I have a non-original key, but the doors match the ignition.
If you have access to the door locks, the code should be stamped on the side of the lock cylinder.
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Old Apr 7, 2011 | 11:48 PM
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All '63 and '64 cars used one Briggs and Stratton octagon key for the doors, ignition, glovebox and spare tire carrier according to the JG. Dave
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Old Apr 8, 2011 | 09:19 AM
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Originally Posted by Godholio
Is there any way to reverse-engineer the codes? I have a non-original key, but the doors match the ignition.


You don't have to reverse engineer. All you do is take the key you are using to a locksmith. Have him cut a new key using the Octagon key in cutting the new key. Just make sure the Octagon key you are getting is a Briggs and Stratton key. Mine still has the GM logo on both keys. You may be able to find some original blanks on the internet. I thought I saw some on Ebay a while back.

Steve
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Old Apr 8, 2011 | 10:28 AM
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A good locksmith can tell, or has the information, to cut your key with a cutter, and not by copying your worn key on a grinder, like the hardware stores. He can then give you the key code to duplicate this. I have seen Chevrolet parts men do this just by looking at it, and my buddy, the locksmith, did it for me. I have seen others that did not have a clue. Check around for a smart one.

You can also remove the ignition tumbler very easily, and have it recoded to match the doors. This is very easy. Many lock shops also carry original blanks.

BTW, one of my Chevrolet service manuals has a section on doing just this, as do pages O-2&3&4 of the 63 Corvette service manual.

Last edited by landshark 454; Apr 8, 2011 at 10:38 AM.
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Old Apr 8, 2011 | 08:38 PM
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I should've been more clear...I want to get a key with the code on it. Sounds like that's an option if the code is stamped on the lock itself. Thanks!
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Old Apr 8, 2011 | 08:58 PM
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Default '66 locks and keys

Originally Posted by Godholio
I should've been more clear...I want to get a key with the code on it. Sounds like that's an option if the code is stamped on the lock itself. Thanks!
For '66, original door looks will have the 4-digit code number for the octagonal key stamped into the outer surface of the lock core. Same is true for the ignition lock core.

Also for '66, an original glove box lock will have the code number for the pear shaped key stamped into the lock core.

Of more than 100 spare tire locks I've examined, only about 5% have the code numbers stamped into the side of the lock core, so the spare tire lock is NOT helpful 95 times out of 100 for finding the code number stamped into the lock plug.

The code number can also be deciphered by reading the cuts on a key (by eye, or using a key cut gage) and then going to a code book or locksmith software to determine the code. Using the code books is a bit of a pain, since there are not sorted by cuts, they are sorted by key code. On average, it takes me about 20 minutes to find a specific sequence of key cuts in the code book. It's quicker, of course, if the specific cuts happen to be for a key near the starting code number of 8500; longer if the specific cuts are near 9499.

Gary
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Old Apr 8, 2011 | 09:18 PM
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Originally Posted by Godholio
Is there any way to reverse-engineer the codes? I have a non-original key, but the doors match the ignition.
If you have the cylinders out a locksmith may help but most of them are not interested in our old cars...That's exactly what I recently experienced when I worked on my ignition switch as my decoder was incorrectly thought to be missing, {stolen} fortunately it was just miss placed

The doors, ignition and trunk are the same key 1953 to 1966 {B-10}....I have a decoder that can recognize the six OE cuts of a key if the key is not too badly worn. A Chevy dealer may have the same tools and could read your key cuts.... If they dont have the cutter any more I could cut the key if supplied with the code
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Old Apr 8, 2011 | 09:24 PM
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Originally Posted by LB66383
That's very interesting information. My '66 has one key for the doors and a different key for the ignition....and I don't know if either fits the glove box!!
well make it right man....we can't have that! ...
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Old Apr 9, 2011 | 10:40 AM
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What am I missing? Why dont you just try the keys and see which one unlocks the doors and glovebox and which starts the car? I take it you havent started the car???
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