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-   -   Boot lock fix (spinning key syndrome). (https://www.the75andztclub.co.uk/forum/showthread.php?t=128721)

Unclefista 7th November 2012 15:49

Boot lock fix (spinning key syndrome).
 
After having issues with my boot not opening on the key, I eventually found a lock with the part I needed that wasn't broken and fixed it.
Since then I've answered a few threads explaining what to do, (stupidly I didn't take any photos) but it's not easy without pics.

I obtained a spare boot lock today because it was free :) and I've disassembled it and taken some photos of the process.

Hopefully I'll be able to point to this thread next time someone asks.

The symptoms:
Key rotates in the boot lock and doesn't unlock, the key can be spun around and around, usually there's a stop.

The cause:
Inside the lock there is a small intricate casting which cracks and breaks up.

The solution:
Replace the casting with a good one, the key is not needed for the donor lock. Finding a good one isn't easy, the one in the photos is the only one I've seen that's not cracked and/or broken at all.
I suggest taking the lock apart to check the parts before paying for it in the scrapyard.

To remove the lock you need to peel back the boot lid lining, undo the bar on the lock (red plastic clip) undo the 2 screws that secure it to the boot lid, rotate the lock and pull out, then undo the electrical plug.

You'll then have this
https://lh3.googleusercontent.com/-5...t+lock+002.JPG

Turn it upside down to reveal the end plate secured by a circlip.
https://lh4.googleusercontent.com/-Y...t+lock+003.JPG

Remove the circlip.
https://lh3.googleusercontent.com/-y...t+lock+004.JPG

The end can then come off, don't lose the spring.
https://lh3.googleusercontent.com/-Z...t+lock+005.JPG

Revealing the problem (there is no problem in the pic, the lock is fine).
https://lh6.googleusercontent.com/-b...t+lock+006.JPG

To get to the part, you need to remove the part holding it in place.
Where the slots are in the black plastic, you need to lever the cylinder up.
https://lh6.googleusercontent.com/-K...t+lock+007.JPG

Then remove it.
https://lh5.googleusercontent.com/-S...t+lock+008.JPG

https://lh4.googleusercontent.com/-H...t+lock+009.JPG

Which allows the part we're after to be removed.
https://lh4.googleusercontent.com/-P...t+lock+010.JPG
https://lh5.googleusercontent.com/-8...t+lock+011.JPG

Slide the pieces apart.
https://lh5.googleusercontent.com/-m...t+lock+012.JPG
https://lh5.googleusercontent.com/-w...t+lock+013.JPG

This is the part that breaks up, replace with a good one and reassemble.
https://lh3.googleusercontent.com/-G...t+lock+014.JPG
https://lh6.googleusercontent.com/-E...t+lock+015.JPG

Disclaimer:
You are responsible for any work or modifications carried out on your car and you undertake any such work at your own risk.
The 75 and ZT Owners Club nor the original author of this How-To can be held liable for anything that may happen as a result
of you following this How-To.

Dragrad 7th November 2012 21:30

Excellent job Tony and so has earned its place in the How To ;):bowdown::D:D

Dallas 11th April 2015 18:58

I have same problem with an added extra piece broken, the black plastic lugs on the triangle end piece.

http://www.the75andztclub.co.uk/foru...91c9c11b0c.jpg

http://www.the75andztclub.co.uk/foru...91c9b97784.jpg

http://www.the75andztclub.co.uk/foru...91c9c6c835.jpg

BaroqueMoon 12th April 2015 03:35

I'll be doing mine tomorrow.

Edit: Brilliant how to. Not only do I have the convenience of the lock working with the key again it also stopped an annoying trunk open alarm.
Hoorah! :D

Dallas 12th April 2015 09:24

Hi Matthew, Where did you get the parts ?

BaroqueMoon 13th April 2015 04:02

Hi Westly I just asked here in the parts wanted section.

geofftl1000r 18th October 2015 12:37

Decided to get my boot lock fixed today. I was lucky the plastic ears were not broken so didn't need the 'screw fix'. I didn't have a new metal part so resorted to using a small loop I got from an old key ring.
Unfortunately I couldn't get the oem return spring back in position but at least the boot lock is working again. Hopefully the pictures explain better then me! 

http://s1288.photobucket.com/user/ge...how/Rover%2075

Charles 10th June 2017 18:16

Thanks to Uncle Fiesta for a very helpful post. It certainly belongs on the "How to" page, although I couldn't find it there.

The problem with taking parts from old locks is that they are used and may be nearing the end of their lives. I did this fix three years ago but now need to do it again, and working locks are becoming more difficult to find.

It's a long shot, I know, but is it possible to buy a new cast piece to replace the broken one? Alternatively, does anyone know whether there is a vehicle currently in production which uses the same piece in its locks, so that I could buy a new lock to extract the relevant part?

Dallas 10th June 2017 18:56

You could try THIS remedy. :}

Charles 10th June 2017 19:53

I was going to try that, but the plastic lugs on my lock are not broken; it's only the casting which is defunct. Thanks for the suggestion, though.


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