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Manche757

Broken Key in Ignition 89MJ

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I was leaving the gym at 6:20am this morning and thought I had a jump on the day.  I put the key in the ignition and the tumblers hung a little as they often do.  It was dark out and only one of the interior lights work. I fiddled with it a little and pulled the key out and saw that it was broken off on the smooth part of the shaft; all of the ridges were in the cylinder. I had not forced it but I think it was an original 30 year old key.  I thought hell, I will call a cab. Have the truck towed to a mechanic and hope he can get to it today. Another cab to pick it up when finished.  Much of the day blown.  But.....   I keep a spare key hidden on the truck and thought what the hell I will give it a try. I was amazed that the second key went in without any hesitation.  I assume the other end of the cylinder is open and the broken shaft was pushed out the other end.  Is the inside end of the cylinder open for that very reason?

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If half the key remains in the cylinder you may want to get it out before long, eventually something is going to bind up.

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7 minutes ago, Jeep Driver said:

If half the key remains in the cylinder you may want to get it out before long, eventually something is going to bind up.

 

The second key went in without any trouble and turned and started the truck without any trouble.  Could that have happened, if the ridged part of the shaft wasn't pushed out the other end of the cylinder?

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The other end is blocked, I don't see that happening. Could it be that the key was just so worn the ridges worn down. The other possibility is that when you pulled the old one out they came out and are on the floor. I would like to see the old key, can you send me a picture of it?

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5 hours ago, jdog said:

The other possibility is that when you pulled the old one out they came out and are on the floor. 

 

This sounds like the most plausible sitiation.  No way two keys fit in the cylinder at the same time, and the cylinder is only open on one end.

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14 hours ago, jdog said:

The other end is blocked, I don't see that happening. Could it be that the key was just so worn the ridges worn down. The other possibility is that when you pulled the old one out they came out and are on the floor. I would like to see the old key, can you send me a picture of it?

The broken off piece was in a crevice on the floor. Glad it was not in cylinder. The key has Jeep on one side; American Motors on the other. Chrome over brass.

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