Boot Lock Failure - Removal and Repair
The following instructions on the repair of the boot lid locking mechanism is the work of Michaela/MikkiJayne/D2 Doctor and is a single post extract from one of her threads. I've posted it as a separate thread to make it easier to find.
------------------------------------------------------------------ Also fixed the boot lock since it was seized completely solid Removed via the door for for the light cluster http://forum.a8parts.co.uk/attachmen...1&d=1524342355 Disassembled the main body http://forum.a8parts.co.uk/attachmen...1&d=1524342355 http://forum.a8parts.co.uk/attachmen...1&d=1524342355 http://forum.a8parts.co.uk/attachmen...1&d=1524342355 The lock barrel was completely seized in the housing. Lots of WD40 and wiggling and it finally came free. http://forum.a8parts.co.uk/attachmen...1&d=1524342355 Crusty! http://forum.a8parts.co.uk/attachmen...1&d=1524342355 Started removing the tumblers http://forum.a8parts.co.uk/attachmen...1&d=1524342355 http://forum.a8parts.co.uk/attachmen...1&d=1524342355 All disassembled. It took about half an hour cleaning schmutz out of the barrel with an assortment of pokey tools, degreaser and compressed air before the little door would close again! http://forum.a8parts.co.uk/attachmen...1&d=1524342355 Cleaned all the tumblers up http://forum.a8parts.co.uk/attachmen...1&d=1524342355 Reassembled prior to re-greasing http://forum.a8parts.co.uk/attachmen...1&d=1524342397 Going back together http://forum.a8parts.co.uk/attachmen...1&d=1524342397 http://forum.a8parts.co.uk/attachmen...1&d=1524342397 http://forum.a8parts.co.uk/attachmen...1&d=1524342397 You can see the cam which operates the central locking here via these two microswitches http://forum.a8parts.co.uk/attachmen...1&d=1524342397 All back together and ready to put back in http://forum.a8parts.co.uk/attachmen...1&d=1524342397 |
Thanks Sean +++
Refreshing my memory on how this goes together, I think the key just spinning may be caused by the tab on the end of the lock barrel not being engaged properly in the rest of the mechanism. Given that this whole thing is mostly lightweight pot-metal it could be that one or more pieces are actually broken, but if that is the case then either the barrel, or the individual tumblers could be swapped in to a used lock mechanism to resolve the problem while keeping the same key. If anyone wants to remove a spinning lock and send it down for diagnosis / repair then let me know :) |
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I've been having a look at David's lock over the weekend. Everything seemed in good order and nicely greased, but the barrel was stuck fast in the surround. After sitting overnight in WD40 I managed to get it apart and discovered that it was just corrosion on the first few mm of the barrel holding it place.
http://forum.a8parts.co.uk/attachmen...1&d=1613947807 After cleaning, it was clear why - the rubber seal was perished and disintegrated so moisture could get in. http://forum.a8parts.co.uk/attachmen...1&d=1613947807 The seal is a flat-ish moulded thing which is not available as a spare part. The thought occurred that an o-ring might work to replace it, and the oil cooler pipe o-ring appears to be just the right size http://forum.a8parts.co.uk/attachmen...1&d=1613947807 It actually goes together quite well, but its a little stiff to turn so it might need a smaller o-ring. http://forum.a8parts.co.uk/attachmen...1&d=1613947807 Or, I might see if I can print a polyurethane replacement for the original seal. |
Mine doesn’t have a seal there at all, and the barrel was corroded at the top end like David’s. I’ve got a load of different sized O-rings, so I’ll pop one in when I fit the last tumbler. Good job you pointed that out, otherwise I expect mine would have corroded again in no time!
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I'm about to try printing one. If it works, I'll post you one with the tiny spring which will be on its way this afternoon :)
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The printed part is perfect for the job +++ will post a pic later
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You’re a star! Thanks Michaela
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Thanks MJ, +++
Neat job .... and now youve shamed me with the state of the key (its lost the audi rings and generally looks old and battered like its owner), im going to have to get a new key!! |
The solution is cheap as chips for missing rings.... http://forum.a8parts.co.uk/showthread.php?t=15821
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