Trunk Lock Replacement


Background

For what ever reason you may need to replace the trunk lock it’s a pretty easy process.

Costs

The barrel chrome is about £13

Grommet to the trunk £2

Trunk Catch £45

What’s in the box

This depends on what you need, from just the chrome, or a new catch it depends. But this is not an expensive change even for the whole lot.

Process

To Remove:

Of course if you wish to remove the part it’s a lot easier than fitting. If you are going to replace the part i use masking tape right to the edge of the mechanism. This will show the exact position to replace the part, and also stops any accidents on the paint. Two bolts on either side of the catch will release the complete locking mechanism and will simply lift away from the trunk metal work. Undo the nut to the barrel inside the trunk lid, I had to use a deep reach socket as the locking rod that fits into the mechanism is quite long.  With the nut out of the way remove with the large washer.

Push the barrel out and the inner mounting sleeve will slide of and drop into your hand. It’s as simple as that.

Optional Step

To remove the tumbler from the tube turn the key as if you were going to pen the lock. From the picture below you will see a small pin that sits in a recess. With a small screwdriver or punch press the pin down and the key tumbler will slide out. To fit is reverse process.

To install:

The trunk lock is made up of only a few parts, the barrel, sleeve, washer, nut, and the trunk catch. It is a good idea to service the locks while they are out from the car, grease the joins and working parts to ensure trouble free use. This is the old sleeve slightly pitted and marked up.

The first step is to fit the grommet to the barrel which can only be fitted one way due to the key way.

Then carefully pass the mechanism through the trunk so the key way at the top sits in recess cut out of the trunk.

With the barrel in place make sure the grommet is spaced evenly around the barrel on the paint work. holding the barrel in place there is an inner sleeve that is a tight push over the inner barrel that will hold it all in place. It goes without saying that the angle of the sleeve matches the inner profile of the trunk and needs to be fitted the correct way up. The sleeve gap should line up with the barrel key way at the bottom. You can see from the large assembled pic the sleeve behind the nut and washer.

Now you can let go of the barrel and add the washer then the nut to the thread of the barrel. You will need a deep reach large socket to tighten the nut back up again.

Now comes the only tricky part, fitting the catch. The catch only has two bolts one either side to hold it in place. The catch will need to be aligned up to the barrel bar which is flat on either side. Make sure the latch is over and vertical. I previously sprayed the catch a metallic silver for detail and protection before I started any fitting work.

Make sure the key is out of the lock so you can fit the trunk catch in the locked position.

Align the catch in place with the masking tape, insert the two bolts and tighten up to a nip. The adjustment is made on the fitting in the trunk. In theory you shouldn’t have to touch it, a simple job that finishes the back of the car. Shut the trunk to make sure all is correct, if so then undo the trunk and tighten up fully. Any adjustments to the catch are made on the bottom bracket in the trunk area.

Results:

It only took about half hour to change the chrome sleeve over. The result is so much better and reflects the nice paint job. A simple DIY job for the complete part, but if you want to change the key barrell only take a little more care to get the pin in the right place to remove the barrell.