Door lock cylinders...

[kevinshi]

I am unable to find a source for the 65 convertible door lock cylinders using the precise MPC part number (C5GY-6222050-A).

However there is wide availability for the Falcon/Mustang part number (C5DZ-6222050-A).

The pictures of these parts look compatible to me... anyone have experience replacing their cylinders?

[Jims65cyclone]

Are you planning to replace just the cylinders, or the whole lock assembly? I had to replace my ignition switch a year or so ago, so that meant my ignition key didn't match my doors anymore, so that meant three keys to deal with. Then, my 54 year old keys that are worn down to nubs got to where they wouldn't open the doors without a lot of jiggling, and sometimes not even then. So I ended up ordering this set off of ebay. $27 bucks and they work great.
https://www.ebay.com/itm/1964-1965-Merc ... 9072!US!-1

JIm

[kevinshi]

Well "yes" sort of...

I have replaced my ignition with a push button starter... meanwhile my door lock cylinders are just worn out. So I really didn't want the ignition switch...

However I ended up buying exactly what you did and they work just fine (as I expected). I found a good video on YouTube for how to rekey the lock (by swapping the tumbler pins) so I ended up setting mine up to match the trunk lock.

Thanks!
kevin

[Jims65cyclone]

Got a link for that re-keying video? That could come in handy in the future.

Jim

[kevinshi]

Yep: https://www.youtube.com/watch?v=icq_D0v8RF0

Thru trial and error I discovered that the whole process would be a gazillion times easier with something called a Key Guage or Key Decoder which is used to measure the cuts on the key so that you know what size pin to use for each of the five lower pins. I cannot say for certain but I believe this one specifically measures the pins in the locks used by Ford in the 1960s.

For me the new cylinders had a slightly smaller diameter pin size than my originals. This meant I couldn't just reuse the original pins (they were too fat). I managed to find the right combination but it was pretty painstaking without this tool because each time I replaced a pin it would sometimes initially feel correct only to have it fail after I jiggled the lock a bit (to simulate road rattle)... so the "guessing" process is pretty annoying...

It would definitely be a LOT easier to let a locksmith do it... but I really wanted to learn how it all works anyway so I just persevered (and indeed it is pretty interesting how they work).

[Lip Ripper]

Don't tell anyone but I have removed all the pins from door lock cylinders before. Sshhh!

Stacey

[lavron]

Don't tell anyone but I have removed all the pins from door lock cylinders before. Sshhh!

Stacey

I did that on the garage walk doors in our old house, actually I left some that matched the main house door key because I did not have enough matching pins.

See Ya,
Mike